118-641: The Laohu Valley Reserve (LVR) is a nature reserve located near Philippolis in the Free State and near Vanderkloof Dam in the Northern Cape of South Africa . It is a roughly 350-square-kilometre private reserve. It has been created with the aims of nurturing captive-born South China tigers ( Panthera tigris tigris ) in South Africa and eventually releasing them into the wild in China . It
236-580: A wildlife reserve that is beneficial to the South African ecosystem. This can be considered the contribution of the South China tigers to the biodiversity of South Africa. Without the Chinese tigers, the land for the project in South Africa would never have been purchased. Save China's Tigers do not believe there will be any side-effect to the local ecology. The Laohu Valley Reserve is one of
354-467: A UNESCO World Heritage Site since 1 December 1999. In Kosovo, there are 2 national parks , 11 nature reserves, 99 natural monuments and 3 protected landscapes . The national parks are Bjeshkët e Nemuna National Park and Sharr Mountains National Park . As of 2011, Poland has 1469 nature reserves. Nature reserves are one of the 11 types of protected areas in Portugal. As of 2012, Portugal had
472-943: A federal government, Canada recognizes 55 National Wildlife Areas, containing species of ecological significance. This area is protected by legislation known as the Canada Wildlife Act, which is overseen by the Ministry of Environment and Climate Change. About half of the habitat is marine habitat, and the remainder is terrestrial habitat. Nature Conservancy Canada, Ducks Unlimited, and Escarpment Biosphere Conservancy, among others, protect nature reserves in Canada as well. As part of Canada's Ecological Gifts Program, these charities protect wilderness on privately owned lands. There are 30 nature reserves in Egypt which cover 12% of Egyptian land. Those nature reserves were built according to
590-583: A few weeks before an agreement was due to be signed with Chinese authorities after the Chinese Wildlife Department began to recognize the project's conservation value, the Vartys pulled out of the project. Due to the action spearheaded by Save China's Tigers (SCT), other efforts to convert defunct sheep farms into wildlife farms in this area have been gaining speed. In other words, SCT is a leader in restoring South African biodiversity to
708-529: A field study published in 2021 by researchers at Stockholm University found that they are often transferred from water to air when waves reach land, are a significant source of air pollution , and eventually get into rain. The researchers concluded that pollution may impact large areas. In 2024, a worldwide study of 45,000 groundwater samples found that 31% of samples contained levels of PFAS that were harmful to human health; these samples were taken from areas not near any obvious source of contamination. Rain
826-632: A general system for sanctuaries to follow. Among them, the American Sanctuary Association monitors and aids in various facilities to care for exotic wildlife. The number of sanctuaries has substantially increased over the past few years. In Australia , a nature reserve is the title of a type of protected area used in the jurisdictions of the Australian Capital Territory , New South Wales , Tasmania and Western Australia . The term "nature reserve"
944-483: A long duration. The final droplet size distribution is an exponential distribution . The number of droplets with diameter between d {\displaystyle d} and D + d D {\displaystyle D+dD} per unit volume of space is n ( d ) = n 0 e − d / ⟨ d ⟩ d D {\displaystyle n(d)=n_{0}e^{-d/\langle d\rangle }dD} . This
1062-460: A particular air temperature. How much water vapor a parcel of air can contain before it becomes saturated (100% relative humidity) and forms into a cloud (a group of visible tiny water or ice particles suspended above the Earth's surface) depends on its temperature. Warmer air can contain more water vapor than cooler air before becoming saturated. Therefore, one way to saturate a parcel of air
1180-410: A physical barrier such as a mountain ( orographic lift ). Conductive cooling occurs when the air comes into contact with a colder surface, usually by being blown from one surface to another, for example from a liquid water surface to colder land. Radiational cooling occurs due to the emission of infrared radiation , either by the air or by the surface underneath. Evaporative cooling occurs when moisture
1298-543: A point are estimated by using the value of reflectivity data at individual grid points. A radar equation is then used, which is Z = A R b , {\displaystyle Z=AR^{b},} where Z represents the radar reflectivity, R represents the rainfall rate, and A and b are constants. Satellite-derived rainfall estimates use passive microwave instruments aboard polar orbiting as well as geostationary weather satellites to indirectly measure rainfall rates. If one wants an accumulated rainfall over
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#17327723743211416-406: A rare rainfall event occurring on average once every 10 years. The rainfall will be greater and the flooding will be worse than the worst storm expected in any single year. A 100-year storm describes an extremely rare rainfall event occurring on average once in a century. The rainfall will be extreme and flooding worse than a 10-year event. The probability of an event in any year is the inverse of
1534-407: A result of this warming, monthly rainfall is about 28% greater between 32 and 64 km (20 and 40 mi) downwind of cities, compared with upwind. Some cities induce a total precipitation increase of 51%. Increasing temperatures tend to increase evaporation which can lead to more precipitation. Precipitation generally increased over land north of 30°N from 1900 through 2005 but has declined over
1652-649: A teardrop. The biggest raindrops on Earth were recorded over Brazil and the Marshall Islands in 2004 — some of them were as large as 10 mm (0.39 in). The large size is explained by condensation on large smoke particles or by collisions between drops in small regions with particularly high content of liquid water. Raindrops associated with melting hail tend to be larger than other raindrops. Intensity and duration of rainfall are usually inversely related, i.e., high-intensity storms are likely to be of short duration and low-intensity storms can have
1770-425: A tendency to break up at larger sizes. Smaller drops are called cloud droplets, and their shape is spherical. As a raindrop increases in size, its shape becomes more oblate, with its largest cross-section facing the oncoming airflow. Large rain drops become increasingly flattened on the bottom, like hamburger buns; very large ones are shaped like parachutes . Contrary to popular belief, their shape does not resemble
1888-470: A time period, one has to add up all the accumulations from each grid box within the images during that time. Rainfall intensity is classified according to the rate of precipitation, which depends on the considered time. The following categories are used to classify rainfall intensity: Terms used for a heavy or violent rain include gully washer, trash-mover and toad-strangler. The intensity can also be expressed by rainfall erosivity R-factor or in terms of
2006-769: A total area of approximately 1,330 km (510 sq mi). Section 21 of the National Parks and Access to the Countryside Act 1949 gives local authorities the exclusive statutory power to establish a local nature reserve in consultation with the SNH. The biosphere reserves of Iran have a total land area of 1.64 million km . The "reserves" support more than 8,000 recorded species of plants (almost 2,421 are endemic ), 502 species of birds , 164 species of mammals , 209 species of reptiles , and 375 species of butterflies . India 's 18 biospheres extend over
2124-656: A total of 46 protected areas, which represented 6,807.89 km (2,628.54 sq mi) of land and 463.94 km (179.13 sq mi) of marine surfaces. Among the protected areas, nine are classified as nature reserve ( Portuguese : reserva natural ). About 5.18% of the area of Romania has a protected status (12,360 km (4,770 sq mi)), including the Danube Delta , which makes up half of this area (2.43% of Romania's total area). There are 15 National Parks, and around 90 Natural Parks in Spain. Spain
2242-693: A total of 85,940 km (33,180 sq mi) and protect larger areas than typical national parks in other countries. The first national reserve of India was established in 1986. Israel 's national parks are declared historic sites or nature reserves, which are mostly operated and maintained by the National Nature and Parks Authority. As of 2019, Israel maintains more than 490 nature reserves that protect 2,500 species of indigenous wild plants, 20 species of fish, 530 species of birds and 70 species of mammals. In total, they cover 6,400 km (2,500 sq mi) of nature reserves, approximately 28% of
2360-630: A wildlife refuge since very few people live in the area. Wildlife has flourished in the zone since the Chernobyl nuclear accident in 1986. South Africa is well known for its many nature reserves. The oldest nature reserve in the country (and oldest conservation area in the world) is the Groenkloof Nature Reserve that was established in 1892 in the capital city Pretoria in the old South African Republic and current Republic of South Africa. The country has many national parks but
2478-837: Is Rye Harbour Nature Reserve in East Sussex, where a network of footpaths enables visitors to explore shingle, saltmarsh, saline lagoon, reedbed, and grazing marsh habitats. Through the Natural Heritage (Scotland) Act 1991 the Scottish Natural Heritage (SNH) was established in 1992 as a government body, responsible to the Scottish Government Ministers and through them to the Scottish Parliament. At 31 March 2008, there were 65 Scottish national nature reserves with
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#17327723743212596-472: Is a grassland biome located in semi-arid to semi-humid climate regions of subtropical and tropical latitudes , with rainfall between 750 and 1,270 mm (30 and 50 in) a year. They are widespread on Africa, and are also found in India, the northern parts of South America, Malaysia , and Australia. The humid subtropical climate zone is where winter rainfall is associated with large storms that
2714-455: Is a protected area of importance for flora , fauna , funga , or features of geological or other special interest, which is reserved and managed for purposes of conservation and to provide special opportunities for study or research . They may be designated by government institutions in some countries, or by private landowners, such as charities and research institutions . Nature reserves fall into different IUCN categories depending on
2832-511: Is a time when air quality improves, freshwater quality improves, and vegetation grows significantly. Tropical cyclones , a source of very heavy rainfall, consist of large air masses several hundred miles across with low pressure at the centre and with winds blowing inward towards the centre in either a clockwise direction (southern hemisphere) or counterclockwise (northern hemisphere). Although cyclones can take an enormous toll in lives and personal property, they may be important factors in
2950-654: Is accompanied by plentiful precipitation year-round. The Mediterranean climate regime resembles the climate of the lands in the Mediterranean Basin , parts of western North America, parts of Western and South Australia , in southwestern South Africa and in parts of central Chile . The climate is characterized by hot, dry summers and cool, wet winters. A steppe is a dry grassland . Subarctic climates are cold with continuous permafrost and little precipitation. In 2022, levels of at least four perfluoroalkyl acids (PFAAs) in rain water worldwide greatly exceeded
3068-718: Is added to the air through evaporation, which forces the air temperature to cool to its wet-bulb temperature , or until it reaches saturation. The main ways water vapor is added to the air are wind convergence into areas of upward motion, precipitation or virga falling from above, daytime heating evaporating water from the surface of oceans, water bodies or wet land, transpiration from plants, cool or dry air moving over warmer water, and lifting air over mountains. Water vapor normally begins to condense on condensation nuclei such as dust, ice, and salt in order to form clouds. Elevated portions of weather fronts (which are three-dimensional in nature) force broad areas of upward motion within
3186-403: Is also aimed to restore South African biodiversity in the parts of the reserve not populated by tigers. The Laohu Valley Reserve was created in 2002 out of 17 defunct sheep farms , and efforts to return the overgrazed land to natural status are ongoing. The South China tigers at LVR for rewinding are kept confined to a tiger-proof camp complex of roughly 1.8 square kilometers, with other areas of
3304-563: Is also causing changes in the precipitation pattern, including wetter conditions across eastern North America and drier conditions in the tropics. Antarctica is the driest continent. The globally averaged annual precipitation over land is 715 mm (28.1 in), but over the whole Earth, it is much higher at 990 mm (39 in). Climate classification systems such as the Köppen classification system use average annual rainfall to help differentiate between differing climate regimes. Rainfall
3422-457: Is also protected, and hunting is not allowed, but products and by-products from research may be sold. Wildlife refuges in Brazil have as their objective the protection of natural flora and fauna where conditions are assured for the existence and reproduction of species or communities of the local flora and the resident or migratory fauna. The refuges can consist of privately owned land, as long as
3540-842: Is commonly referred to as the Marshall–Palmer law after the researchers who first characterized it. The parameters are somewhat temperature-dependent, and the slope also scales with the rate of rainfall ⟨ d ⟩ − 1 = 41 R − 0.21 {\displaystyle \langle d\rangle ^{-1}=41R^{-0.21}} (d in centimeters and R in millimeters per hour). Deviations can occur for small droplets and during different rainfall conditions. The distribution tends to fit averaged rainfall, while instantaneous size spectra often deviate and have been modeled as gamma distributions . The distribution has an upper limit due to droplet fragmentation. Raindrops impact at their terminal velocity , which
3658-881: Is defined in the relevant statutes used in those states and territories rather than by a single national statute. As of 2016, 1767 out of a total of 11044 protected areas listed within the Australian National Reserve System used the term "nature reserve" in their names. In Brazil, nature reserves are classified by the National System of Nature Conservation Units as ecological stations ( Portuguese : estações ecológicas ) or biological reserves ( Portuguese : reservas biológicas ). Their main objectives are preserving fauna and flora and other natural attributes, excluding direct human interference. Visits are allowed only with permission, and only for educational or scientific purposes. Changes to
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3776-410: Is derived from natural sources such as volcanoes, and wetlands (sulfate-reducing bacteria); and anthropogenic sources such as the combustion of fossil fuels , and mining where H 2 S is present. Nitric acid is produced by natural sources such as lightning, soil bacteria, and natural fires; while also produced anthropogenically by the combustion of fossil fuels and from power plants. In the past 20 years,
3894-487: Is equally distributed through the year. Some areas with pronounced rainy seasons will see a break in rainfall mid-season when the Intertropical Convergence Zone or monsoon trough move poleward of their location during the middle of the warm season. When the wet season occurs during the warm season, or summer , rain falls mainly during the late afternoon and early evening hours. The wet season
4012-498: Is greater for larger drops due to their larger mass-to-drag ratio. At sea level and without wind, 0.5 mm (0.020 in) drizzle impacts at 2 m/s (6.6 ft/s) or 7.2 km/h (4.5 mph), while large 5 mm (0.20 in) drops impact at around 9 m/s (30 ft/s) or 32 km/h (20 mph). Rain falling on loosely packed material such as newly fallen ash can produce dimples that can be fossilized, called raindrop impressions . The air density dependence of
4130-564: Is maximized within windward sides of the terrain at elevation which forces moist air to condense and fall out as rainfall along the sides of mountains. On the leeward side of mountains, desert climates can exist due to the dry air caused by downslope flow which causes heating and drying of the air mass . The movement of the monsoon trough , or Intertropical Convergence Zone , brings rainy seasons to savannah climes . The urban heat island effect leads to increased rainfall, both in amounts and intensity, downwind of cities. Global warming
4248-497: Is measured in units of length per unit time, typically in millimeters per hour, or in countries where imperial units are more common, inches per hour. The "length", or more accurately, "depth" being measured is the depth of rain water that would accumulate on a flat, horizontal and impermeable surface during a given amount of time, typically an hour. One millimeter of rainfall is the equivalent of one liter of water per square meter. The standard way of measuring rainfall or snowfall
4366-408: Is measured using rain gauges . Rainfall amounts can be estimated by weather radar . Air contains water vapor, and the amount of water in a given mass of dry air, known as the mixing ratio , is measured in grams of water per kilogram of dry air (g/kg). The amount of moisture in the air is also commonly reported as relative humidity ; which is the percentage of the total water vapor air can hold at
4484-410: Is moisture moving along three-dimensional zones of temperature and moisture contrasts known as weather fronts . If enough moisture and upward motion is present, precipitation falls from convective clouds (those with strong upward vertical motion) such as cumulonimbus (thunder clouds) which can organize into narrow rainbands . In mountainous areas, heavy precipitation is possible where upslope flow
4602-424: Is referred to as banded structure. Rainbands in advance of warm occluded fronts and warm fronts are associated with weak upward motion, and tend to be wide and stratiform in nature. Rainbands spawned near and ahead of cold fronts can be squall lines which are able to produce tornadoes . Rainbands associated with cold fronts can be warped by mountain barriers perpendicular to the front's orientation due to
4720-569: Is specifically defined in the Reserves Act to mean a reserve that prioritizes the protection of rare flora and fauna, to the extent that public access is by permit only. Some of these reserves include Ecological Islands , a comparatively new concept in wildlife preservation, pioneered in New Zealand to help rebuild the populations of nearly extinct birds, and other species that are heavily threatened by introduced predators. In Nicaragua ,
4838-624: Is the country with the most sites listed in the World Network of Biosphere Reserves . There are 4 biosphere reserves (two of them are dated 1927 and 1874) and 17 nature reserves in Ukraine, covering 160,000 ha (400,000 acres). Ukraine administers 40 national parks , 2632 habitat management areas, 3025 nature monuments, and 1430 other preservations. There are some differences between the regulations for England , Northern Ireland , Scotland and Wales , which are separately managed. At
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4956-561: Is the expected amount of liquid precipitation accumulated over a specified time period over a specified area. A QPF will be specified when a measurable precipitation type reaching a minimum threshold is forecast for any hour during a QPF valid period. Precipitation forecasts tend to be bound by synoptic hours such as 0000, 0600, 1200 and 1800 GMT . Terrain is considered in QPFs by use of topography or based upon climatological precipitation patterns from observations with fine detail. Starting in
5074-411: Is the presence of a thick layer of air aloft which is above the melting point of water, which melts the frozen precipitation well before it reaches the ground. If there is a shallow near-surface layer that is below freezing, freezing rain (rain which freezes on contact with surfaces in subfreezing environments) will result. Hail becomes an increasingly infrequent occurrence when the freezing level within
5192-440: Is the standard rain gauge, which can be found in 100-mm (4-in) plastic and 200-mm (8-in) metal varieties. The inner cylinder is filled by 25 mm (0.98 in) of rain, with overflow flowing into the outer cylinder. Plastic gauges have markings on the inner cylinder down to 0.25 mm (0.0098 in) resolution, while metal gauges require use of a stick designed with the appropriate 0.25 mm (0.0098 in) markings. After
5310-399: Is to cool it. The dew point is the temperature to which a parcel must be cooled in order to become saturated. There are four main mechanisms for cooling the air to its dew point: adiabatic cooling, conductive cooling, radiational cooling, and evaporative cooling. Adiabatic cooling occurs when air rises and expands. The air can rise due to convection , large-scale atmospheric motions, or
5428-647: Is yet to be officially classified), and seven specific types of "reserve", each of which prioritize various degrees of protection to different amenities such as scenery, recreation, flora and fauna, scientific value, or history. Land is often sub-categorised beneath its general classification, as defined in law between the Reserves Act of 1977 , the National Parks Act of 1980 , and the Conservation Act of 1987 . Under these classifications,
5546-470: The Department of Conservation administers more than 80,000 square kilometres (31,000 sq mi)—nearly 30% of the nation's total area—with at least some degree of protection. This land is composed of 14 National Parks, 30 Conservation Parks, and approximately 8,900 discrete areas of land in total. Although the most public land is strongly protected for natural preservation, the term nature reserve
5664-694: The Endangered Wildlife Trust (EWT), two male South African cheetahs ( Acinonyx jubatus jubatus ) were relocated by being taken from the Amakhala Game Reserve and released into the Laohu Valley Reserve. It is noted to be first time that wild cheetahs have been reintroduced to the Free State after a hundred years of regional extinction. In early 2016, an adult female South African cheetah was introduced to
5782-589: The Great Basin and Mojave Deserts . The wet, or rainy, season is the time of year, covering one or more months, when most of the average annual rainfall in a region falls. The term green season is also sometimes used as a euphemism by tourist authorities. Areas with wet seasons are dispersed across portions of the tropics and subtropics . Savanna climates and areas with monsoon regimes have wet summers and dry winters. Tropical rainforests technically do not have dry or wet seasons, since their rainfall
5900-651: The Ministry of the Environment and Natural Resources (MARENA) is in charge of environmental protection and of the study, planning, and management of Nicaragua's natural resources. Nearly one-fifth of the territory is designated as protected areas like national parks, nature reserves (including the Bosawás Biosphere Reserve ), and biological reserves. Nicaragua has 78 protected areas that cover 22,422 km (8,657 sq mi), about 17.3% of
6018-545: The Vanderkloof Dam ) in the Northern Cape section, which consists of approximately 146 square kilometres (56 sq mi) on the southern side. The Free State side of the reserve consists of tiger camps bordered by 6,000 kilometres (3,700 mi) of fence. Mean annual rainfall is about 400 mm. About 60% of the annual rainfall occurs in the form of thunderstorms during January-April. The maximum amount of rain generally falls during March, with June generally being
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#17327723743216136-409: The tropics appears to be convective; however, it has been suggested that stratiform precipitation also occurs. Graupel and hail indicate convection. In mid-latitudes, convective precipitation is intermittent and often associated with baroclinic boundaries such as cold fronts , squall lines , and warm fronts. Orographic precipitation occurs on the windward side of mountains and is caused by
6254-455: The westerlies steer from west to east. Most summer rainfall occurs during thunderstorms and from occasional tropical cyclones. Humid subtropical climates lie on the east side continents, roughly between latitudes 20° and 40° degrees away from the equator. An oceanic (or maritime) climate is typically found along the west coasts at the middle latitudes of all the world's continents, bordering cool oceans, as well as southeastern Australia, and
6372-581: The British established the Yob Wildlife Reserve in northern Eritrea specifically to protect significant populations of Nubian ibex in the area. Denmark has three national parks and several nature reserves, some of them inside the national park areas. The largest single reserve is Hanstholm Nature Reserve, which covers 40 km (9,900 acres) and is part of Thy National Park . In Sweden , there are 30 national parks . The first of them
6490-461: The EPA's lifetime drinking water health advisories as well as comparable Danish, Dutch, and European Union safety standards, leading to the conclusion that "the global spread of these four PFAAs in the atmosphere has led to the planetary boundary for chemical pollution being exceeded". It had been thought that PFAAs would eventually end up in the oceans, where they would be diluted over decades, but
6608-404: The Earth's atmosphere which form clouds decks such as altostratus or cirrostratus . Stratus is a stable cloud deck which tends to form when a cool, stable air mass is trapped underneath a warm air mass. It can also form due to the lifting of advection fog during breezy conditions. Coalescence occurs when water droplets fuse to create larger water droplets. Air resistance typically causes
6726-678: The Internet, such as CoCoRAHS or GLOBE. If a network is not available in the area where one lives, the nearest local weather or met office will likely be interested in the measurement. One of the main uses of weather radar is to be able to assess the amount of precipitations fallen over large basins for hydrological purposes. For instance, river flood control , sewer management and dam construction are all areas where planners use rainfall accumulation data. Radar-derived rainfall estimates complement surface station data which can be used for calibration. To produce radar accumulations, rain rates over
6844-889: The Northeast and Midwest, which in the past decade, have seen 31 and 16 percent more heavy downpours compared to the 1950s. Rhode Island is the state with the largest increase, 104%. McAllen, Texas is the city with the largest increase, 700%. Heavy downpour in the analysis are the days where total precipitation exceeded the top one percent of all rain and snow days during the years 1950–2014. The most successful attempts at influencing weather involve cloud seeding , which include techniques used to increase winter precipitation over mountains and suppress hail . Rainbands are cloud and precipitation areas which are significantly elongated. Rainbands can be stratiform or convective , and are generated by differences in temperature. When noted on weather radar imagery, this precipitation elongation
6962-557: The Orange River. The Laohu Valley Reserve is known to breed South China tigers ( Panthera tigris amoyensis ). At the end of 2015, there were 20 wild individuals living in the reserve, representing about 20% of the world's population of this critically endangered subspecies. Two cubs were among those individuals. However, in February 2016, one of the two South China tiger cubs born in late 2015 died, leaving 19 South China tigers in
7080-571: The United States is Pelican Island National Wildlife Refuge and was established by Theodore Roosevelt in 1903 as part of his Square Deal campaign to improve the country. At the time, setting aside land for wildlife was not a constitutional right of the president. In 2006, a bi-partisan group of US House of Representatives members established the Congressional Wildlife Refuge Caucus to further support
7198-642: The ancient world. According to stone inscriptions found in the vicinity, the king commanded the people not to harm animals or destroy trees within the area. In the United States, the U.S. Fish and Wildlife Service , managed by the Secretary of the Interior , is responsible for managing many of the federal nature reserves including the National Wildlife Refuge System . The National Wildlife Refuge System includes areas administered for
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#17327723743217316-462: The area around Phillippolis in the Free State. There are people who oppose the project because they are afraid that the tigers, being considered an alien species, will affect the South African biodiversity negatively. However, the project organisers argue it will not cause such a problem as Laohu Valley Reserve has been converted from 17 pieces of defunct sheep farms that were overgrazed; thus no healthy ecosystems existed there at all. In addition,
7434-405: The atmosphere exceeds 3,400 m (11,000 ft) above ground level. Convective rain , or showery precipitation, occurs from convective clouds (e.g., cumulonimbus or cumulus congestus ). It falls as showers with rapidly changing intensity. Convective precipitation falls over a certain area for a relatively short time, as convective clouds have limited horizontal extent. Most precipitation in
7552-809: The best-known is the Kruger National Park , which was announced in 1898, and is the largest, at nearly 2,000,000 ha (20,000 km ). The Kruger Park and Table Mountain National Park are two of South Africa's most visited tourist attractions, along with the Addo Elephant National Park . South Africa also has 10 World Heritage Sites , including four natural sites and one mixed site. And it has provincial game reserves including Shamwari , Londolozi , Sanbona and Lalibela. The country currently has 20 national parks covering 3,700,000 ha (37,000 km ), about 3% of
7670-517: The concentrations of nitric and sulfuric acid has decreased in presence of rainwater, which may be due to the significant increase in ammonium (most likely as ammonia from livestock production), which acts as a buffer in acid rain and raises the pH. The Köppen classification depends on average monthly values of temperature and precipitation. The most commonly used form of the Köppen classification has five primary types labeled A through E. Specifically,
7788-612: The contiguous United States, total annual precipitation increased at an average rate of 6.1 percent since 1900, with the greatest increases within the East North Central climate region (11.6 percent per century) and the South (11.1 percent). Hawaii was the only region to show a decrease (−9.25 percent). Analysis of 65 years of United States of America rainfall records show the lower 48 states have an increase in heavy downpours since 1950. The largest increases are in
7906-856: The country's land area. In 1984, the two areas with the highest number of nature reserves were the South (15.2%) and Samaria (the Shomron, 13.5%). Under the Nature Conservation Law, places can be designated as 'wilderness areas', 'nature conservation areas' and 'prefectural nature conservation areas'. In 1995, when the Japanese Government published its information in English, there were 5 wilderness areas, 10 nature conservation areas and 516 prefectural nature conservation areas. There are seven nature reserves in Jordan . In 1966
8024-646: The country's total area. A few of them predate the October Revolution of 1917, but most have been created during the Soviet Union era. There are also natural protected areas where only certain species are protected, or only certain activities are prohibited; those are known as zakaznik (Russian: заказник ). Unofficial sanctuaries can also occur as a result of human accidents; the Chernobyl Exclusion Zone has in practice become
8142-647: The course of the week, the likelihood of rain increases: it peaks by Saturday, after five days of weekday pollution has been built up. In heavily populated areas that are near the coast, such as the United States' Eastern Seaboard , the effect can be dramatic: there is a 22% higher chance of rain on Saturdays than on Mondays. The urban heat island effect warms cities 0.6 to 5.6 °C (33.1 to 42.1 °F) above surrounding suburbs and rural areas. This extra heat leads to greater upward motion, which can induce additional shower and thunderstorm activity. Rainfall rates downwind of cities are increased between 48% and 116%. Partly as
8260-412: The crystal and neighboring water droplets. This process is temperature dependent, as supercooled water droplets only exist in a cloud that is below freezing. In addition, because of the great temperature difference between cloud and ground level, these ice crystals may melt as they fall and become rain. Raindrops have sizes ranging from 0.1 to 9 mm (0.0039 to 0.3543 in) mean diameter but develop
8378-559: The descending and generally warming, leeward side where a rain shadow is observed. In Hawaii , Mount Waiʻaleʻale , on the island of Kauai, is notable for its extreme rainfall, as it is amongst the places in the world with the highest levels of rainfall, with 9,500 mm (373 in). Systems known as Kona storms affect the state with heavy rains between October and April. Local climates vary considerably on each island due to their topography, divisible into windward ( Koʻolau ) and leeward ( Kona ) regions based upon location relative to
8496-450: The driest month. Summer days are hot, but frost is common during winter, with occasional snowfall. The grasslands of Laohu Valley occur on the lower-lying flat areas, with karroid shrubs on the rocky hill slopes on Karoo dolerite making up roughly 40% of the total area. Fairly dense stands of shrubs and trees occur along rivers and in ravines. Extensive stands of closed, dense Acacia karoo woodlands are found along stretches of
8614-424: The ecosystems in both types of reserve are allowed to restore and preserve the natural balance, biological diversity and natural ecological processes. Ecological stations are also allowed to change the environment within strictly defined limits (e.g. affecting no more than three percent of the area or 1,500 hectares (3,700 acres), whichever is less) for the purpose of scientific research. A wildlife reserve in Brazil
8732-709: The end of March 2004, there were 215 national nature reserves in England with a total area of 879 km (339 sq mi). The reserves are scattered through England, from Lindisfarne in Northumberland to The Lizard in Cornwall . Nearly every rural county has at least one. Many national nature reserves contain nationally important populations of rare flowers , ferns and mosses , butterflies and other insects , and nesting and wintering birds . Examples include unique alpine plants at Upper Teesdale and
8850-504: The field of snake's head fritillaries at North Meadow, Cricklade , Wiltshire . There are now over 1,050 local nature reserves in England. They range from windswept coastal headlands, ancient woodlands and flower-rich meadows to former inner-city railways, long-abandoned landfill sites and industrial areas now re-colonized by wildlife. In total, they cover almost 40,000 ha (99,000 acres)—a natural resource which makes an important contribution to England's biodiversity . A good example
8968-511: The formation of a low-level barrier jet . Bands of thunderstorms can form with sea breeze and land breeze boundaries if enough moisture is present. If sea breeze rainbands become active enough just ahead of a cold front, they can mask the location of the cold front itself. Once a cyclone occludes an occluded front (a trough of warm air aloft) will be caused by strong southerly winds on its eastern periphery rotating aloft around its northeast, and ultimately northwestern, periphery (also termed
9086-482: The front is unstable enough for convection. Banding within the comma head precipitation pattern of an extratropical cyclone can yield significant amounts of rain. Behind extratropical cyclones during fall and winter, rainbands can form downwind of relative warm bodies of water such as the Great Lakes . Downwind of islands, bands of showers and thunderstorms can develop due to low-level wind convergence downwind of
9204-400: The ground. This is termed virga and is more often seen in hot and dry climates. Stratiform (a broad shield of precipitation with a relatively similar intensity) and dynamic precipitation (convective precipitation which is showery in nature with large changes in intensity over short distances) occur as a consequence of slow ascent of air in synoptic systems (on the order of cm/s), such as in
9322-552: The higher mountains. Windward sides face the east to northeast trade winds and receive much more rainfall; leeward sides are drier and sunnier, with less rain and less cloud cover. In South America, the Andes mountain range blocks Pacific moisture that arrives in that continent, resulting in a desert-like climate just downwind across western Argentina. The Sierra Nevada range creates the same effect in North America forming
9440-438: The inner cylinder is filled, the amount inside it is discarded, then filled with the remaining rainfall in the outer cylinder until all the fluid in the outer cylinder is gone, adding to the overall total until the outer cylinder is empty. Other types of gauges include the popular wedge gauge (the cheapest rain gauge and most fragile), the tipping bucket rain gauge, and the weighing rain gauge. For those looking to measure rainfall
9558-422: The island edges. Offshore California , this has been noted in the wake of cold fronts. Rainbands within tropical cyclones are curved in orientation. Tropical cyclone rainbands contain showers and thunderstorms that, together with the eyewall and the eye, constitute a hurricane or tropical storm . The extent of rainbands around a tropical cyclone can help determine the cyclone's intensity. The phrase acid rain
9676-470: The largest protected areas in South Africa , comprising an area of approximately 378 square kilometres (146 sq mi). It is located in the central region of the country. It takes in land near Philippolis in the Free State section, which consists of approximately 232 square kilometres (90 sq mi) on the northern side, and spans part of the Orange River (including the upper reaches of
9794-585: The largest total areas being in Bavaria with 1,416 km (547 sq mi) and Lower Saxony with 1,275 km (492 sq mi). In Hungary, there are 10 national parks , more than 15 nature reserves and more than 250 protected areas. Hortobágy National Park is the largest continuous natural grassland in Europe and the oldest national park in Hungary. It is situated on the eastern part of Hungary, on
9912-564: The laws no. 102/1983 and 4/1994 for protection of the Egyptian nature reserve. Egypt announced a plan from to build 40 nature reserves from 1997 to 2017, to help protect the natural resources and the culture and history of those areas. The largest nature reserve in Egypt is Gebel Elba (35,600 square kilometres (13,700 sq mi)) in the southeast, on the Red Sea coast. On 16 March 1959,
10030-506: The level of protection afforded by local laws. Normally it is more strictly protected than a nature park . Various jurisdictions may use other terminology, such as ecological protection area or private protected area in legislation and in official titles of the reserves. Cultural practices that roughly equate to the establishment and maintenance of reserved areas for animals date back to antiquity, with King Devanampiya Tissa of Sri Lanka establishing Mihintale wildlife sanctuary, one of
10148-427: The maximum raindrop diameter together with fossil raindrop imprints has been used to constrain the density of the air 2.7 billion years ago. The sound of raindrops hitting water is caused by bubbles of air oscillating underwater . The METAR code for rain is RA, while the coding for rain showers is SHRA. In certain conditions, precipitation may fall from a cloud but then evaporate or sublime before reaching
10266-428: The most inexpensively, a can that is cylindrical with straight sides will act as a rain gauge if left out in the open, but its accuracy will depend on what ruler is used to measure the rain with. Any of the above rain gauges can be made at home, with enough know-how. When a precipitation measurement is made, various networks exist across the United States and elsewhere where rainfall measurements can be submitted through
10384-549: The nation's landmass. Private nature reserves exist with land excluded from private land trusts and maintained at the sole cost of the proprietor. For example, O Parks, WildLife, and Recreation, Or El Ostional Private Wildlife Reserve, was established within the Mesoamerican Biological Corridor by retired FDNY firefighter Kevin Michael Shea, who purchased 46 acres (0.19 km ) of land for
10502-623: The needs of the National Wildlife Refuge System in Congress . Rainfall Rain is water droplets that have condensed from atmospheric water vapor and then fall under gravity . Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides water for hydroelectric power plants , crop irrigation , and suitable conditions for many types of ecosystems . The major cause of rain production
10620-462: The number of heavy precipitation events over many areas during the past century, as well as an increase since the 1970s in the prevalence of droughts—especially in the tropics and subtropics. Changes in precipitation and evaporation over the oceans are suggested by the decreased salinity of mid- and high-latitude waters (implying more precipitation), along with increased salinity in lower latitudes (implying less precipitation and/or more evaporation). Over
10738-557: The objectives of the unit are compatible with the landowners' usage of the land and natural resources. Public visits are subject to the conditions and restrictions established by the management plan of the unit and are subject to authorisation by and regulations of the main administrative and scientific research body. The Niagara Escarpment and the St. Lawrence River in Ontario are among the 18 nature reserves recognized by UNESCO in Canada. As
10856-563: The organization that would later start Jordan's nature reserves, the Royal Society for the Conservation of Nature , was founded. RSCN's first efforts involved bringing back severely endangered species. In 1973, RSCN was given the right to issue hunting licenses, giving RSCN an upper hand in preventing extinction. The first step was the founding of Jordan's first nature reserve, Shaumari Wildlife Reserve , in 1975. The primary purpose
10974-585: The plain of the Alföld. It was established in 1972. There are alkaline grasslands interrupted by marshes. They have a sizable importance because there are the fishponds. One of the most spectacular sights of the park is the autumn migration of cranes. Some famous Hungarian animal species live in Hortobágy National Park, such as the grey cattle, racka long-wool sheep living only in Hungary, Hungarian horses and buffalo. Hortobágy National Park has been
11092-478: The precipitation regimes of places they impact, as they may bring much-needed precipitation to otherwise dry regions. Areas in their path can receive a year's worth of rainfall from a tropical cyclone passage. The fine particulate matter produced by car exhaust and other human sources of pollution forms cloud condensation nuclei leads to the production of clouds and increases the likelihood of rain. As commuters and commercial traffic cause pollution to build up over
11210-579: The primary types are A, tropical; B, dry; C, mild mid-latitude; D, cold mid-latitude; and E, polar. The five primary classifications can be further divided into secondary classifications such as rain forest , monsoon , tropical savanna , humid subtropical , humid continental , oceanic climate , Mediterranean climate , steppe , subarctic climate , tundra , polar ice cap , and desert . Rain forests are characterized by high rainfall, with definitions setting minimum normal annual rainfall between 1,750 and 2,000 mm (69 and 79 in). A tropical savanna
11328-596: The project's funds to buy land for themselves. Later, in July 2002, the Vartys admitted to borrowing a small portion of Bray's money. After a legal audit, it was discovered that over R5-million had been borrowed by the Vartys, having been used to pay off the Vartys' Londolozi Productions debt on unauthorized salaries. Some of the money was also said to have gone into the Vartys' personal loan accounts and towards paying off their Betty's Bay seaside property. Finally, in October 2002,
11446-499: The protection and conservation of fish and wildlife that are threatened with extinction, as well as wildlife ranges, game ranges, wildlife management areas, and waterfowl production areas. The first North American wildlife refuge, Lake Merritt Wildlife sanctuary at Lake Merritt , was established by Samuel Merritt and enacted in California state law in 1870 as the first government owned refuge. The first federally owned refuge in
11564-531: The purpose of restoring the ecological system of a dry tropical forest , ravaged during the Nicaraguan Revolution . The park provides a private nature reserve, wildlife corridor and verified carbon credits . There are around 100 nature reserves ( Russian : заповедник , romanized : zapovednik ) in Russia, covering some 330,000 km (130,000 sq mi), or about 1.4% of
11682-399: The rainfall time-structure n-index . The average time between occurrences of an event with a specified intensity and duration is called the return period . The intensity of a storm can be predicted for any return period and storm duration, from charts based on historic data for the location. The return period is often expressed as an n -year event. For instance, a 10-year storm describes
11800-419: The reserve being used to protect native South African species. The word "laohu" is a Chinese term for tiger. Wildlife conservationist Li Quan initially enlisted the help of John Varty (wildlife filmmaker) and Dave Varty (eco-tourism developer) in South Africa to assist in the rehabilitation process. However, Li Quan and her husband, investment banker Stuart Bray, became concerned that the Vartys were misusing
11918-705: The reserve too. It is also home to birds such as crested guineafowl ( Guttera pucherani ), Egyptian geese ( Alopochen aegyptiaca ) and South African ostriches ( Struthio camelus australis ). The prey menus of tiger and lion are similar. The South China tigers prey on blesboks ( Damaliscus pygargus phillipsi ), springboks ( Antidorcas marsupialis ), gemsboks ( Oryx gazella ), black wildebeest ( Connochaetes gnou ), blue wildebeest ( Connochaetes taurinus ), common elands ( Taurotragus oryx ), impalas ( Aepyceros melampus ), waterbucks ( Kobus ellipsiprymnus ), common warthogs ( Phacochoerus africanus ) and cape hares ( Lepus capensis ). In 2013, in partnership with
12036-900: The reserve. At some point in that year, the South China tigers made a quick recovery with the birth of six healthy cubs at Laohu Valley Reserve, most of which are confirmed to be males. Three cubs were born to Madonna: Hunter, Ivan, and Jay. Two cubs to Cathay: Felix and Gilbert. And one cub to Princess known as K, although the cub's gender has yet to be determined. Other than tigers, predators such as African wild dogs ( Lycaon pictus ), lions ( Panthera leo ), African leopards ( Panthera pardus pardus ), spotted hyenas ( Crocuta crocuta ), cheetahs ( Acinonyx jubatus ), Nile crocodiles ( Crocodylus niloticus ), African wildcats ( Felis silvestris ), caracals ( Caracal caracal ), bat-eared foxes ( Otocyon megalotis megalotis ) and black-backed jackals ( Canis mesomelas ), and herbivorous mammals such as Blesbuck , and plains zebras ( Equus quagga ), live within
12154-441: The reserve. Three wild cheetah cubs were born in Laohu Valley Reserve in February 2017, the first cheetahs born in the wild in the Free State since their disappearance from the province over a century ago. Download coordinates as: Nature reserve A nature reserve (also known as a wildlife refuge , wildlife sanctuary , biosphere reserve or bioreserve , natural or nature preserve , or nature conservation area )
12272-428: The return period (assuming the probability remains the same for each year). For instance, a 10-year storm has a probability of occurring of 10 percent in any given year, and a 100-year storm occurs with a 1 percent probability in a year. As with all probability events, it is possible, though improbable, to have multiple 100-year storms in a single year. The Quantitative Precipitation Forecast (abbreviated QPF)
12390-442: The rising air motion of a large-scale flow of moist air across the mountain ridge, resulting in adiabatic cooling and condensation. In mountainous parts of the world subjected to relatively consistent winds (for example, the trade winds ), a more moist climate usually prevails on the windward side of a mountain than on the leeward or downwind side. Moisture is removed by orographic lift, leaving drier air (see katabatic wind ) on
12508-411: The tigers are in fenced-off camps – hence the South China tigers never roam outside Laohu Valley Reserve and there is, therefore, no contact between them and any healthy ecosystem that exists nearby. On the contrary, instead of having negative effects on South Africa's biodiversity, the project actually has positive effects on it. This is because the defunct sheep farms have been restored and converted into
12626-468: The total area of South Africa. The Prince Edward Islands , which are South African territories in the Southern Ocean , have been declared a special nature reserve. It is a highly protected area from which all human activity is excluded, except for conservation and scientific research. The area around Mihintale , Sri Lanka , was a sanctuary for wildlife, probably the first of its generation in
12744-492: The tropics since the 1970s. Globally there has been no statistically significant overall trend in precipitation over the past century, although trends have varied widely by region and over time. Eastern portions of North and South America, northern Europe, and northern and central Asia have become wetter. The Sahel, the Mediterranean, southern Africa and parts of southern Asia have become drier. There has been an increase in
12862-543: The vicinity of cold fronts and near and poleward of surface warm fronts . Similar ascent is seen around tropical cyclones outside the eyewall , and in comma-head precipitation patterns around mid-latitude cyclones . A wide variety of weather can be found along an occluded front, with thunderstorms possible, but usually, their passage is associated with a drying of the air mass. Occluded fronts usually form around mature low-pressure areas. What separates rainfall from other precipitation types, such as ice pellets and snow,
12980-408: The warm conveyor belt), forcing a surface trough to continue into the cold sector on a similar curve to the occluded front. The front creates the portion of an occluded cyclone known as its comma head , due to the comma -like shape of the mid-tropospheric cloudiness that accompanies the feature. It can also be the focus of locally heavy precipitation, with thunderstorms possible if the atmosphere along
13098-555: The water droplets in a cloud to remain stationary. When air turbulence occurs, water droplets collide, producing larger droplets. As these larger water droplets descend, coalescence continues, so that drops become heavy enough to overcome air resistance and fall as rain. Coalescence generally happens most often in clouds above freezing (in their top) and is also known as the warm rain process. In clouds below freezing, when ice crystals gain enough mass they begin to fall. This generally requires more mass than coalescence when occurring between
13216-441: The world's earliest wildlife sanctuaries , in the 3rd-century-BC Anuradhapura Ancient Kingdom. Early reservations often had a religious underpinning, such as the 'evil forest' areas of West Africa which were forbidden to humans, who were threatened with spiritual attack if they went there. Sacred areas taboo from human entry to fishing and hunting are known by many ancient cultures worldwide. The world's first modern nature reserve
13334-627: Was Yellowstone National Park in Wyoming, United States , followed by the Royal National Park near Sydney , Australia, and the Barguzin Nature Reserve of Imperial Russia , the first of zapovedniks set up by a federal government entirely for the scientific study of nature. There are several national and international organizations that oversee the numerous non-profit animal sanctuaries and refuges to provide
13452-505: Was described by David Attenborough as "one of the first people anywhere to recognise not only that the natural world was of great importance but that it needed protection as humanity made more and more demands on it". Drachenfels was protected as the first state-designated nature reserve in modern-day Germany; the site was bought by the Prussian State in 1836 to protect it from further quarrying. The first major nature reserve
13570-634: Was established in 1821 by the naturalist and explorer Charles Waterton around his estate in Walton Hall, West Yorkshire . He spent £9000 on the construction of a three-mile long, 9 ft tall wall to enclose his park against poachers . He tried to encourage bird life by planting trees and hollowing out trunks for owls to nest in. Waterton invented artificial nest boxes to house starlings , western jackdaws and sand martins ; and unsuccessfully attempted to introduce little owls from Italy. Waterton allowed local people access to his reserve and
13688-829: Was established in 1909. There are almost 4,000 nature reserves in Sweden. They comprise about 85% of the surface that is protected by the Swedish Environmental Code. In Estonia, there are five national parks , more than 100 nature reserves, and around 130 landscape protection areas. The largest nature reserve in Estonia is Alam-Pedja Nature Reserve , which covers 342 km (85,000 acres). As of 2017, France counts 10 national parks , around 50 regional nature parks , and 8 marine parks . In 1995 Germany had 5,314 nature reserves ( German : Naturschutzgebiete ) covering 6,845 km (2,643 sq mi),
13806-558: Was first used by Scottish chemist Robert Augus Smith in 1852. The pH of rain varies, especially due to its origin. On America's East Coast, rain that is derived from the Atlantic Ocean typically has a pH of 5.0–5.6; rain that comes across the continental from the west has a pH of 3.8–4.8; and local thunderstorms can have a pH as low as 2.0. Rain becomes acidic primarily due to the presence of two strong acids, sulfuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ). Sulfuric acid
13924-615: Was to create means to breed endangered species, specifically: the Arabian oryx , gazelles , ostriches , and Persian onagers in their natural environment. By the end of 2009 there were 10 nature reserves ( Kyrgyz : корук , koruk ) in Kyrgyzstan covering 600,000 hectares (6,000 km ) or about three percent of the total area of the country. New Zealand has a variety of types of reserve, including national parks , various types of conservation areas (including stewardship land that
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