Västervik is a city and the seat of Västervik Municipality , Kalmar County , Sweden , with 36,747 inhabitants in 2021. Västervik is one of three coastal towns with a notable population size in the province of Småland .
104-508: Västervik has a semi-continental type of the oceanic climate ( Cfb ) using the -3°C isotherm, and a true humid continental climate (Dfb) using the 0°C isotherm, with vast differences between seasons. The major weather station in the area is in Gladhammar 10 kilometres (6.2 mi) west of Västervik. Differences are likely to be minor, with precipitation normals being available in greater detail for Västervik's station. Overnight lows may be
208-756: A 335 m tall guyed mast used for FM/TV-transmission, which shares with three other masts the title of Sweden's tallest structure. Every year since 1966 there is a folk music festival in Västervik, at the ruins of the Stegeholm castle. The area has artistic talent by artists, potters, craft people and painters. Being a summer town popular with yachtspeople, campers, daytrippers, and returning former residents, Västervik experiences an annual revival in July. Västervik offers an outdoor life of climbing, canoeing and sailing or islands to visit and stay at. Björn Ulvaeus ,
312-410: A cycle of states of its working body. The engine takes in a quantity of heat Q 1 from a hot reservoir and passes out a lesser quantity of waste heat Q 2 < 0 to a cold reservoir. The net heat energy absorbed by the working body is passed, as thermodynamic work, to a work reservoir, and is considered to be the output of the engine. The cycle is imagined to run so slowly that at each point of
416-897: A few highland areas of Tasmania , and the Australian and Southern Alps . This type of climate is even found in very remote parts of the New Guinea Highlands . The classification used for this regime is Cfc. Temperatures above 30 °C (86 °F) and below −20 °C (−4 °F) are rare. In the most marine areas under this regime, temperatures above 20 °C (68 °F) are extreme weather events, even during summer. Small areas in Yunnan, Sichuan ; parts of Bolivia and Peru ; and parts of Mount Kilimanjaro in Tanzania have summers sufficiently short to be Cwc with fewer than four months over 10 °C (50 °F). This
520-402: A fixed volume and mass of an ideal gas is directly proportional to its temperature. Some natural gases show so nearly ideal properties over suitable temperature range that they can be used for thermometry; this was important during the development of thermodynamics and is still of practical importance today. The ideal gas thermometer is, however, not theoretically perfect for thermodynamics. This
624-488: A gas can be calculated theoretically from the gas's molecular character, temperature, pressure, and the Boltzmann constant. For a gas of known molecular character and pressure, this provides a relation between temperature and the Boltzmann constant. Those quantities can be known or measured more precisely than can the thermodynamic variables that define the state of a sample of water at its triple point. Consequently, taking
728-406: A linear relation between their numerical scale readings, but it does require that the relation between their numerical readings shall be strictly monotonic . A definite sense of greater hotness can be had, independently of calorimetry , of thermodynamics, and of properties of particular materials, from Wien's displacement law of thermal radiation : the temperature of a bath of thermal radiation
832-415: A loss of heat from a closed system, without phase change, without change of volume, and without a change in external force fields acting on it, decreases its temperature. While for bodies in their own thermodynamic equilibrium states, the notion of temperature requires that all empirical thermometers must agree as to which of two bodies is the hotter or that they are at the same temperature, this requirement
936-614: A member of the internationally successful pop group ABBA who grew up in Västervik, is building a complex consisting of hotel, restaurant, and apartments in the bay near Stegeholm castle, which will be a tourist attraction for Västervik. On the north western outskirts on the Stora Infartsvägen road, there is a speedway stadium known as the Ljungheden , where the Västervik Speedway team compete. Västervik
1040-514: A product and reflection of the cool ocean adjacent to them. In the autumn, winter, and early spring, when the polar jet stream is most active, the frequent passing of marine weather systems creates the frequent fog, cloudy skies, and light drizzle often associated with oceanic climates. They are typically found poleward of Mediterranean climates , except in Australia where they are poleward of both such climates and humid subtropical climates due to
1144-485: A reference temperature at the triple point of water, the numerical value of which is defined by measurements using the aforementioned internationally agreed Kelvin scale. Many scientific measurements use the Kelvin temperature scale (unit symbol: K), named in honor of the physicist who first defined it . It is an absolute scale. Its numerical zero point, 0 K , is at the absolute zero of temperature. Since May 2019,
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#17327906665381248-524: A reference temperature. It is known as the Kelvin scale , widely used in science and technology. The kelvin (the unit name is spelled with a lower-case 'k') is the unit of temperature in the International System of Units (SI). The temperature of a body in a state of thermodynamic equilibrium is always positive relative to absolute zero. Besides the internationally agreed Kelvin scale, there
1352-561: A relatively narrow annual temperature range and few extremes of temperature. Oceanic climates can be found in both hemispheres generally between 40 and 60 degrees latitude, with subpolar versions extending to 70 degrees latitude in some coastal areas. Other varieties of climates usually classified together with these include subtropical highland climates , represented as Cwb or Cfb , and subpolar oceanic or cold subtropical highland climates , represented as Cfc or Cwc . Subtropical highland climates occur in some mountainous parts of
1456-612: A result of their location, these regions tend to be on the cool end of oceanic climates, approaching polar regions . Snowfall tends to be more common here than in other oceanic climates. Subpolar oceanic climates are less prone to temperature extremes than subarctic climates or continental climates , featuring milder winters than these climates. Subpolar oceanic climates feature only one to three months of average monthly temperatures of at least 10 °C (50 °F). As with oceanic climates, none of its average monthly temperatures fall below -3.0 °C (26.6 °F) or 0 °C depending on
1560-462: A spatially varying local property in that body, and this is because the temperature is an intensive variable. Temperature is a measure of a quality of a state of a material. The quality may be regarded as a more abstract entity than any particular temperature scale that measures it, and is called hotness by some writers. The quality of hotness refers to the state of material only in a particular locality, and in general, apart from bodies held in
1664-551: A species being all alike. It explains macroscopic phenomena through the classical mechanics of the microscopic particles. The equipartition theorem of kinetic theory asserts that each classical degree of freedom of a freely moving particle has an average kinetic energy of k B T /2 where k B denotes the Boltzmann constant . The translational motion of the particle has three degrees of freedom, so that, except at very low temperatures where quantum effects predominate,
1768-415: A specific intensive variable. An example is a diathermic wall that is permeable only to heat; the intensive variable for this case is temperature. When the two bodies have been connected through the specifically permeable wall for a very long time, and have settled to a permanent steady state, the relevant intensive variables are equal in the two bodies; for a diathermal wall, this statement is sometimes called
1872-400: A steady state of thermodynamic equilibrium, hotness varies from place to place. It is not necessarily the case that a material in a particular place is in a state that is steady and nearly homogeneous enough to allow it to have a well-defined hotness or temperature. Hotness may be represented abstractly as a one-dimensional manifold . Every valid temperature scale has its own one-to-one map into
1976-750: A strict air-mass sense, not oceanic: they are affected by southerlies directly from the Mediterranean, and polar intrusions from Siberia. Yet their position near the Black Sea makes them too wet in summer to be Mediterranean , too mild during winter to be humid continental , and not hot enough in summer to be humid subtropical ; therefore Köppen classifies them as oceanic. Despite their anomalous position, however, their temperatures, around 4–5 °C (39–41 °F) in winter and 20–22 °C (68–72 °F) in summer, are not wholly atypical for European oceanic climates. Some Eastern European regions such as
2080-435: A system undergoing a first-order phase change such as the melting of ice, as a closed system receives heat, without a change in its volume and without a change in external force fields acting on it, its temperature rises. For a system undergoing such a phase change so slowly that departure from thermodynamic equilibrium can be neglected, its temperature remains constant as the system is supplied with latent heat . Conversely,
2184-511: Is proportional , by a universal constant, to the frequency of the maximum of its frequency spectrum ; this frequency is always positive, but can have values that tend to zero . Thermal radiation is initially defined for a cavity in thermodynamic equilibrium. These physical facts justify a mathematical statement that hotness exists on an ordered one-dimensional manifold . This is a fundamental character of temperature and thermometers for bodies in their own thermodynamic equilibrium. Except for
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#17327906665382288-425: Is a climate variety, often grouped together with oceanic climates, which exists in some mountainous or elevated portions of the world in either the subtropics or tropics. Despite the latitude, the higher elevations of these regions mean that the climate shares characteristics with oceanic climates. Subtropical highland climates with uniform rainfall ( Cfb ) usually have rainfall spread relatively evenly throughout
2392-604: Is also a thermodynamic temperature scale , invented by Lord Kelvin , also with its numerical zero at the absolute zero of temperature, but directly relating to purely macroscopic thermodynamic concepts, including the macroscopic entropy , though microscopically referable to the Gibbs statistical mechanical definition of entropy for the canonical ensemble , that takes interparticle potential energy into account, as well as independent particle motion so that it can account for measurements of temperatures near absolute zero. This scale has
2496-569: Is also the name of a small village 8 km north of Vaasa , Finland . The name just means "western bay", so there could be more minor localities by that name. Oceanic climate An oceanic climate , also known as a marine climate or maritime climate , is the temperate climate sub-type in Köppen classification represented as Cfb , typical of west coasts in higher middle latitudes of continents, generally featuring cool to warm summers and cool to mild winters (for their latitude), with
2600-409: Is an intensive variable because it is equal to a differential coefficient of one extensive variable with respect to another, for a given body. It thus has the dimensions of a ratio of two extensive variables. In thermodynamics, two bodies are often considered as connected by contact with a common wall, which has some specific permeability properties. Such specific permeability can be referred to
2704-518: Is arbitrary, and an alternate, less widely used absolute temperature scale exists called the Rankine scale , made to be aligned with the Fahrenheit scale as Kelvin is with Celsius. The thermodynamic definition of temperature is due to Kelvin. It is framed in terms of an idealized device called a Carnot engine , imagined to run in a fictive continuous cycle of successive processes that traverse
2808-454: Is because the entropy of an ideal gas at its absolute zero of temperature is not a positive semi-definite quantity, which puts the gas in violation of the third law of thermodynamics. In contrast to real materials, the ideal gas does not liquefy or solidify, no matter how cold it is. Alternatively thinking, the ideal gas law, refers to the limit of infinitely high temperature and zero pressure; these conditions guarantee non-interactive motions of
2912-463: Is below 18 °C (64 °F). Without their elevation, many of these regions would likely feature either humid subtropical or tropical climates. This type of climate exists in parts of east, south and southeastern Africa , interior southern Africa and elevated portions of eastern Africa as far north as Ethiopia and of western Africa (west region of Cameroon) up to the southwestern Angola highlands also share this climate type. It also exists in
3016-571: Is climatically Mediterranean , some parts of Southern Europe also have oceanic climates. However, these instances of the climate are highly variable, and often somewhat anomalous. The north coast of Spain , the western Azores off the coast of Portugal are too wet in summer to be Mediterranean, and too mild in summer to be humid subtropical , though they often have winter means above 9 °C (48 °F), unusual for European oceanic climates. Another anomalous case can be found in northwestern Turkey, including northern Istanbul . These places are, in
3120-547: Is directly proportional to the temperature of the black body; this is known as Wien's displacement law and has a theoretical explanation in Planck's law and the Bose–Einstein law . Measurement of the spectrum of noise-power produced by an electrical resistor can also provide accurate temperature measurement. The resistor has two terminals and is in effect a one-dimensional body. The Bose-Einstein law for this case indicates that
3224-436: Is disregarded. In an ideal gas , and in other theoretically understood bodies, the Kelvin temperature is defined to be proportional to the average kinetic energy of non-interactively moving microscopic particles, which can be measured by suitable techniques. The proportionality constant is a simple multiple of the Boltzmann constant. If molecules, atoms, or electrons are emitted from material and their velocities are measured,
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3328-617: Is found in parts of coastal Iceland , the Faroe Islands , upland/mountainous parts of Scotland and Northern England , northwestern coastal areas of Norway (most of Lofoten , Vesterålen , warmest part of Tromsø reaching to 71°N on some islands), uplands/highlands in western Norway, the Aleutian Islands of Alaska and northern parts of the Alaskan Panhandle , the southwest of Argentina and Chile , and
3432-434: Is important in all fields of natural science , including physics , chemistry , Earth science , astronomy , medicine , biology , ecology , material science , metallurgy , mechanical engineering and geography as well as most aspects of daily life. Many physical processes are related to temperature; some of them are given below: Temperature scales need two values for definition: the point chosen as zero degrees and
3536-735: Is in South Africa from Mossel Bay on the Western Cape coast to Plettenberg Bay (the Garden Route ), with additional pockets of this climate inland of the Eastern Cape and KwaZulu-Natal coast. It is usually warm most of the year with no pronounced rainy season, but slightly more rain in autumn and spring. The Tristan da Cunha archipelago in the South Atlantic also has an oceanic climate. Although oceanic climate
3640-400: Is more frequent and commonplace in the subpolar oceanic climates due to the colder weather in those locations. Overall temperature characteristics of the oceanic climates feature cool temperatures and infrequent extremes of temperature. In the Köppen climate classification , oceanic climates have a mean temperature of 0 °C (32 °F) or higher (or −3 °C (27 °F) or higher) in
3744-455: Is not safe for bodies that are in steady states though not in thermodynamic equilibrium. It can then well be that different empirical thermometers disagree about which is hotter, and if this is so, then at least one of the bodies does not have a well-defined absolute thermodynamic temperature. Nevertheless, any one given body and any one suitable empirical thermometer can still support notions of empirical, non-absolute, hotness, and temperature, for
3848-418: Is one of the seven base units in the International System of Units (SI). Absolute zero , i.e., zero kelvin or −273.15 °C, is the lowest point in the thermodynamic temperature scale. Experimentally, it can be approached very closely but not actually reached, as recognized in the third law of thermodynamics . It would be impossible to extract energy as heat from a body at that temperature. Temperature
3952-551: Is only one degree of freedom left to arbitrary choice, rather than two as in relative scales. For the Kelvin scale since May 2019, by international convention, the choice has been made to use knowledge of modes of operation of various thermometric devices, relying on microscopic kinetic theories about molecular motion. The numerical scale is settled by a conventional definition of the value of the Boltzmann constant , which relates macroscopic temperature to average microscopic kinetic energy of particles such as molecules. Its numerical value
4056-715: Is rare in Asia, subtropical highland climates and cold subtropical highland climates can be found in parts of Southwestern China , and the Himalayan regions of the northern Indian subcontinent . The oceanic climate is prevalent in the more southerly parts of Oceania . A mild maritime climate is in existence in New Zealand. In Australia, the climate is found in Tasmania , southern half of Victoria and southeastern New South Wales (southwards from Wollongong ). Some parts of
4160-419: Is said to prevail throughout the body. It makes good sense, for example, to say of the extensive variable U , or of the extensive variable S , that it has a density per unit volume or a quantity per unit mass of the system, but it makes no sense to speak of the density of temperature per unit volume or quantity of temperature per unit mass of the system. On the other hand, it makes no sense to speak of
4264-416: Is the cold variant of the monsoon-influenced subtropical highland climate. El Alto, Bolivia is one of the few confirmed towns that features this variation of the subtropical highland climate. Temperature Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness. Temperature is measured with a thermometer . It reflects the average kinetic energy of
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4368-572: The Boltzmann constant , to the Maxwell–Boltzmann distribution , and to the Boltzmann statistical mechanical definition of entropy , as distinct from the Gibbs definition, for independently moving microscopic particles, disregarding interparticle potential energy, by international agreement, a temperature scale is defined and said to be absolute because it is independent of the characteristics of particular thermometric substances and thermometer mechanisms. Apart from absolute zero, it does not have
4472-525: The Boltzmann constant . That constant refers to chosen kinds of motion of microscopic particles in the constitution of the body. In those kinds of motion, the particles move individually, without mutual interaction. Such motions are typically interrupted by inter-particle collisions, but for temperature measurement, the motions are chosen so that, between collisions, the non-interactive segments of their trajectories are known to be accessible to accurate measurement. For this purpose, interparticle potential energy
4576-705: The Grand Banks of Newfoundland , is thought to greatly modify the climate of northwest Europe. As a result of the North Atlantic Current , west coast areas located in high latitudes like Ireland, the UK, and Norway have much milder winters (for their latitude) than would otherwise be the case. The lowland attributes of western Europe also help drive marine air masses into continental areas, enabling cities such as Dresden , Prague , and Vienna to have maritime climates in spite of being located well inland from
4680-846: The Guiana Shield , The highest elevations of the Brazilian Highlands , and due to variations in rainfall and temperature patterns in some places of the Tropical Andes in Bolivia, Perú, Ecuador, Colombia and Venezuela. Most of Yunnan and mountainous areas across Southeast Asia , parts of the Himalayas , parts of Sri Lanka , and parts of the Hawaiian Islands of Maui and Hawaii . In the Caribbean , only
4784-793: The Northern Hemisphere include parts of coastal Iceland , the coast of Norway north of Bodø , the Scottish Highlands , the mountains of Vancouver Island , and Haida Gwaii in Canada . In the Southern Hemisphere examples include extreme southern Chile and Argentina (such as Punta Arenas and Ushuaia ), the Tasmanian Central Highlands , and parts of New Zealand . Oceanic climates are not necessarily found in coastal locations on
4888-425: The subtropics or tropics , some of which have monsoon influence, while their cold variants and subpolar oceanic climates occur near polar or tundra regions. Locations with oceanic climates tend to feature frequent cloudy conditions with precipitation, low hanging clouds, and frequent fronts and storms. Thunderstorms are normally few, since strong daytime heating and hot and cold air masses meet infrequently in
4992-893: The subtropics . It exists in both hemispheres between 35° and 60°: at low altitudes between Mediterranean , humid continental , and subarctic climates. Western sea breezes ease temperatures and moderates the winter, especially if warm sea currents are present, and cause cloudy weather to predominate. Precipitation is constant, especially in colder months, when temperatures are warmer than elsewhere at comparable latitudes. This climate can occur farther inland if no mountain ranges are present or nearby. As this climate causes sufficient moisture year-round without permitting deep snow cover, vegetation typically prospers in this climate. Deciduous trees are predominant in this climate region. However, conifers such as spruce , pine , and cedar are also common in few areas, and fruits such as apples , pears , and grapes can often be cultivated here. In
5096-464: The zeroth law of thermodynamics says that they all measure the same quality. This means that for a body in its own state of internal thermodynamic equilibrium, every correctly calibrated thermometer, of whatever kind, that measures the temperature of the body, records one and the same temperature. For a body that is not in its own state of internal thermodynamic equilibrium, different thermometers can record different temperatures, depending respectively on
5200-483: The 100-degree interval. Since the standardization of the kelvin in the International System of Units, it has subsequently been redefined in terms of the equivalent fixing points on the Kelvin scale, so that a temperature increment of one degree Celsius is the same as an increment of one kelvin, though numerically the scales differ by an exact offset of 273.15. The Fahrenheit scale is in common use in
5304-409: The Boltzmann constant. Taking the value of the Boltzmann constant as a primarily defined reference of exactly defined value, a measurement of the speed of sound can provide a more precise measurement of the temperature of the gas. It is possible to measure the average kinetic energy of constituent microscopic particles if they are allowed to escape from the bulk of the system, through a small hole in
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#17327906665385408-760: The International System of Units defined a scale and unit for the kelvin as a thermodynamic temperature , by using the reliably reproducible temperature of the triple point of water as a second reference point, the first reference point being 0 K at absolute zero. Historically, the temperature of the triple point of water was defined as exactly 273.16 K. Today it is an empirically measured quantity. The freezing point of water at sea-level atmospheric pressure occurs at very close to 273.15 K ( 0 °C ). There are various kinds of temperature scale. It may be convenient to classify them as empirically and theoretically based. Empirical temperature scales are historically older, while theoretically based scales arose in
5512-515: The United States. Water freezes at 32 °F and boils at 212 °F at sea-level atmospheric pressure. At the absolute zero of temperature, no energy can be removed from matter as heat, a fact expressed in the third law of thermodynamics . At this temperature, matter contains no macroscopic thermal energy, but still has quantum-mechanical zero-point energy as predicted by the uncertainty principle , although this does not enter into
5616-424: The aforementioned parallels; however, in most cases oceanic climates parallel higher middle latitude oceans. The polar jet stream , which moves in a west to east direction across the middle latitudes, advances low pressure systems, storms, and fronts. In coastal areas of the higher middle latitudes (45–60° latitude), the prevailing onshore flow creates the basic structure of most oceanic climates. Oceanic climates are
5720-412: The average translational kinetic energy of a freely moving particle in a system with temperature T will be 3 k B T /2 . Molecules, such as oxygen (O 2 ), have more degrees of freedom than single spherical atoms: they undergo rotational and vibrational motions as well as translations. Heating results in an increase of temperature due to an increase in the average translational kinetic energy of
5824-405: The biggest difference, due Västervik's coastal position. The city still bases much of its industry on its harbour, and on the industries that were established as a result of it in the late 19th century. Västervik has suffered the closure of certain factories, notably Electrolux , with associated job losses. Just outside Västervik, there is the static inverter of HVDC Gotland and Fårhultsmasten ,
5928-411: The body is described by stating its entropy S as a function of its internal energy U , and other state variables V , N , with S = S ( U , V , N ) , then the reciprocal of the temperature is equal to the partial derivative of the entropy with respect to the internal energy: The above definition, equation (1), of the absolute temperature, is due to Kelvin. It refers to systems closed to
6032-483: The boiling point of mercury , a mercury-in-glass thermometer is impracticable. Most materials expand with temperature increase, but some materials, such as water, contract with temperature increase over some specific range, and then they are hardly useful as thermometric materials. A material is of no use as a thermometer near one of its phase-change temperatures, for example, its boiling-point. In spite of these limitations, most generally used practical thermometers are of
6136-570: The coldest month, compared to continental climates where the coldest month has a mean temperature of below 0 °C (32 °F) (or −3 °C (27 °F)) in the coldest month. Summers are warm but not hot, with the warmest month having a mean temperature below 22 °C (72 °F). Poleward of the latter is a subtype of it, the subpolar oceanic climate (Köppen Cfc ), with long but relatively mild (for their latitude) winters, and cool and short summers with average temperatures of at least 10 °C (50 °F) for one to three months. Examples in
6240-408: The constituent molecules. The magnitude of the kelvin is now defined in terms of kinetic theory, derived from the value of the Boltzmann constant . Kinetic theory provides a microscopic account of temperature for some bodies of material, especially gases, based on macroscopic systems' being composed of many microscopic particles, such as molecules and ions of various species, the particles of
6344-501: The constituent particles of matter, so that they have a limiting specific heat of zero for zero temperature, according to the third law of thermodynamics. Nevertheless, a thermodynamic temperature does in fact have a definite numerical value that has been arbitrarily chosen by tradition and is dependent on the property of particular materials; it is simply less arbitrary than relative "degrees" scales such as Celsius and Fahrenheit . Being an absolute scale with one fixed point (zero), there
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#17327906665386448-410: The containing wall. The spectrum of velocities has to be measured, and the average calculated from that. It is not necessarily the case that the particles that escape and are measured have the same velocity distribution as the particles that remain in the bulk of the system, but sometimes a good sample is possible. Temperature is one of the principal quantities in the study of thermodynamics . Formerly,
6552-426: The cycle the working body is in a state of thermodynamic equilibrium. The successive processes of the cycle are thus imagined to run reversibly with no entropy production . Then the quantity of entropy taken in from the hot reservoir when the working body is heated is equal to that passed to the cold reservoir when the working body is cooled. Then the absolute or thermodynamic temperatures, T 1 and T 2 , of
6656-442: The definition just stated, was printed in 1853, a paper read in 1851. Numerical details were formerly settled by making one of the heat reservoirs a cell at the triple point of water, which was defined to have an absolute temperature of 273.16 K. Nowadays, the numerical value is instead obtained from measurement through the microscopic statistical mechanical international definition, as above. In thermodynamic terms, temperature
6760-472: The definition of absolute temperature. Experimentally, absolute zero can be approached only very closely; it can never be reached (the lowest temperature attained by experiment is 38 pK). Theoretically, in a body at a temperature of absolute zero, all classical motion of its particles has ceased and they are at complete rest in this classical sense. Absolute zero, defined as 0 K , is exactly equal to −273.15 °C , or −459.67 °F . Referring to
6864-551: The east, and (in some locations) summers become hotter. The line between oceanic Europe and Mediterranean Europe normally runs west to east and is related to changes in precipitation patterns and differences to seasonal temperatures; although intrusions of polar air, remnants of marine air-masses, and higher summer precipitation can create oceanic climates in Eastern Europe and transcontinental regions as far south as 40°N. The oceanic climate exists in an arc spreading across
6968-863: The empirically based kind. Especially, it was used for calorimetry , which contributed greatly to the discovery of thermodynamics. Nevertheless, empirical thermometry has serious drawbacks when judged as a basis for theoretical physics. Empirically based thermometers, beyond their base as simple direct measurements of ordinary physical properties of thermometric materials, can be re-calibrated, by use of theoretical physical reasoning, and this can extend their range of adequacy. Theoretically based temperature scales are based directly on theoretical arguments, especially those of kinetic theory and thermodynamics. They are more or less ideally realized in practically feasible physical devices and materials. Theoretically based temperature scales are used to provide calibrating standards for practical empirically based thermometers. In physics,
7072-635: The exposed areas of the High Atlas , some mountainous areas across southern Europe , mountainous sections of North America , including parts of the southern Appalachians and the Central America Volcanic Arc . In South America , it can be found mainly in temperate mountainous areas in the Tropical Andes , Venezuelan Coastal Range , the highest elevations of Serra do Mar in Southeastern Brazil , and tepuis of
7176-455: The formulation of the first law of thermodynamics. Carnot had no sound understanding of heat and no specific concept of entropy. He wrote of 'caloric' and said that all the caloric that passed from the hot reservoir was passed into the cold reservoir. Kelvin wrote in his 1848 paper that his scale was absolute in the sense that it was defined "independently of the properties of any particular kind of matter". His definitive publication, which sets out
7280-494: The hotness manifold. When two systems in thermal contact are at the same temperature no heat transfers between them. When a temperature difference does exist heat flows spontaneously from the warmer system to the colder system until they are in thermal equilibrium . Such heat transfer occurs by conduction or by thermal radiation. Experimental physicists, for example Galileo and Newton , found that there are indefinitely many empirical temperature scales . Nevertheless,
7384-817: The hottest month, the average temperature is below 22 °C (72 °F), and at least four months feature average temperatures higher than 10 °C (50 °F). The average temperature of the coldest month must not be colder than −3–0 °C (27–32 °F), or the climate will be classified as continental. The average temperature variations in the year are between 10–15 °C (50–59 °F), with average annual temperatures between 6–13 °C (43–55 °F). Rain values can vary from 50–500 cm (20–197 in), depending on whether mountains cause orographic precipitation . Frontal cyclones can be common in marine west coast regions, with some areas experiencing more than 150 rainy days annually, but strong storms are rare. Cfb climates are predominant in most of Europe except
7488-765: The immediate west and northwest in transition for humid continental , the remainder of Cape Cod ) and northeastern Georgia both in the eastern United States . It is also found in the highest portions of the Brazilian state of Bahia and Roraima (in transition or strongly influenced for Cwb ), Brønnøy Municipality in Nordland at 65.28 °N ( Norway north-central coast), the provinces of Sabah (northeastern Malaysia ), and Baluchistan , Pakistan . Although there are more or less rare places associated with relatively isolated mountainous regions (e.g., North Oceania islands and China ). The subtropical highland climate
7592-419: The internal energy at a point, while when local thermodynamic equilibrium prevails, it makes good sense to speak of the temperature at a point. Consequently, the temperature can vary from point to point in a medium that is not in global thermodynamic equilibrium, but in which there is local thermodynamic equilibrium. Thus, when local thermodynamic equilibrium prevails in a body, the temperature can be regarded as
7696-409: The internationally agreed conventional temperature scale is called the Kelvin scale. It is calibrated through the internationally agreed and prescribed value of the Boltzmann constant, referring to motions of microscopic particles, such as atoms, molecules, and electrons, constituent in the body whose temperature is to be measured. In contrast with the thermodynamic temperature scale invented by Kelvin,
7800-561: The isotherm used. Typically, these areas in the warmest month experience daytime maximum temperatures below 17 °C (63 °F), while the coldest month features highs slightly above freezing and lows near or just below freezing while keeping the average warm enough. It typically carries a Cfc designation, though very small areas in Argentina and Chile have summers sufficiently short to be Cwc with fewer than four months over 10 °C (50 °F). This variant of an oceanic climate
7904-453: The kelvin has been defined through particle kinetic theory , and statistical mechanics. In the International System of Units (SI), the magnitude of the kelvin is defined in terms of the Boltzmann constant , the value of which is defined as fixed by international convention. Since May 2019, the magnitude of the kelvin is defined in relation to microscopic phenomena, characterized in terms of statistical mechanics. Previously, but since 1954,
8008-428: The magnitude of the kelvin was defined in thermodynamic terms, but nowadays, as mentioned above, it is defined in terms of kinetic theory. The thermodynamic temperature is said to be absolute for two reasons. One is that its formal character is independent of the properties of particular materials. The other reason is that its zero is, in a sense, absolute, in that it indicates absence of microscopic classical motion of
8112-427: The magnitudes of the incremental unit of temperature. The Celsius scale (°C) is used for common temperature measurements in most of the world. It is an empirical scale that developed historically, which led to its zero point 0 °C being defined as the freezing point of water , and 100 °C as the boiling point of water, both at atmospheric pressure at sea level. It was called a centigrade scale because of
8216-419: The mechanisms of operation of the thermometers. For experimental physics, hotness means that, when comparing any two given bodies in their respective separate thermodynamic equilibria , any two suitably given empirical thermometers with numerical scale readings will agree as to which is the hotter of the two given bodies, or that they have the same temperature. This does not require the two thermometers to have
8320-444: The middle of the nineteenth century. Empirically based temperature scales rely directly on measurements of simple macroscopic physical properties of materials. For example, the length of a column of mercury, confined in a glass-walled capillary tube, is dependent largely on temperature and is the basis of the very useful mercury-in-glass thermometer. Such scales are valid only within convenient ranges of temperature. For example, above
8424-435: The molecules. Heating will also cause, through equipartitioning , the energy associated with vibrational and rotational modes to increase. Thus a diatomic gas will require more energy input to increase its temperature by a certain amount, i.e. it will have a greater heat capacity than a monatomic gas. As noted above, the speed of sound in a gas can be calculated from the gas's molecular character, temperature, pressure, and
8528-400: The noise-power is directly proportional to the temperature of the resistor and to the value of its resistance and to the noise bandwidth. In a given frequency band, the noise-power has equal contributions from every frequency and is called Johnson noise . If the value of the resistance is known then the temperature can be found. Historically, till May 2019, the definition of the Kelvin scale
8632-542: The north of Croatia and Serbia and some parts of the Czech Republic , also have oceanic climates; these are generally near the boundary for being humid continental . The line between oceanic and continental climates in Europe runs in a generally north to south direction. For example, western Germany is more impacted by milder Atlantic air masses than eastern Germany. Thus, winters across Europe become colder to
8736-818: The northeast, as global temperatures became warmer towards late 20th and early 21st century. They are the main climate type in New Zealand and the Australian states of Tasmania , Victoria , and southeastern New South Wales (starting from the Illawarra region). In North America, they are found mainly in Vancouver Island and neighbouring parts of British Columbia , as well as many coastal areas of southeast Alaska . There are pockets of this iteration of Cfb climates in South American countries, mostly in regions of southern Chile and Argentina, parts of
8840-655: The northeastern coast of Honshu , such as Mutsu, Aomori in Japan, feature this climate, which is rare in Asia due to the lack of a west coast in the middle latitudes. Île Amsterdam and Île Saint-Paul , both part of the French Southern and Antarctic Lands , are located in the subtropics and have an oceanic climate (akin to Tristan da Cunha; see above). Temperate oceanic climates, also known as "marine mild winter" climates or simply oceanic climates, are found either at middle latitudes . They are often found on or near
8944-620: The northwestern coast of North America from the Alaskan panhandle to northern Washington . In addition, some east coast areas such as Block Island , Cape Cod , Martha's Vineyard , and Nantucket have a similar climate. And in the highlands of Central and South America with the variant Cfb. An extensive area of oceanic climates distinguishes the coastal regions of southern Chile and extends into bordering Argentina . The only noteworthy area of maritime climate at or near sea-level within Africa
9048-763: The ocean. Oceanic climates in Europe occupy a large stretch of land, from Norway 's Atlantic coast, Ireland and the United Kingdom and southeast to some parts of Turkey . Western Europe is almost exclusively oceanic between 45°N to 54.913°N; including most of France (away from the Mediterranean), nearly all of Belgium , the Netherlands , Austria , most of Luxembourg , most of Denmark , western Germany , northwestern Switzerland , south coast and western areas of Norway north to Skrova and extreme southern Sweden . While most of Southern Europe
9152-842: The peaks in the highest mountain ranges have this climate (including the Blue Mountains in Jamaica and Cerro Maravilla in Puerto Rico ), with only Hispaniola 's Cordillera Central and Chaîne de la Selle having significant urban settlements under this climate zone, such as cities like Kenscoff in Haiti and Constanza in the Dominican Republic . Areas with subpolar oceanic climates feature an oceanic climate but are usually located closer to polar regions, with long but relatively mild winters and short, cool summers. As
9256-454: The presently conventional Kelvin temperature is not defined through comparison with the temperature of a reference state of a standard body, nor in terms of macroscopic thermodynamics. Apart from the absolute zero of temperature, the Kelvin temperature of a body in a state of internal thermodynamic equilibrium is defined by measurements of suitably chosen of its physical properties, such as have precisely known theoretical explanations in terms of
9360-650: The provinces of Chubut , Santa Cruz , and southeast Buenos Aires province in Argentina. In Western Asia , the climate can be found on the Black Sea coast of northern Turkey and Georgia , often transitional to humid subtropical . While Cfb zones are rare in Africa, one dominates the coastline of the Eastern Cape in South Africa . The climate subtype can also be found in Nantucket , Massachusetts (in
9464-419: The regions, but are more common in subtropical highland climates where these air masses meet more frequently due to the influence of hotter weather in the subtropics or tropics, especially in monsoon-influenced climates. In most areas with an oceanic climate, precipitation comes in the form of rain for the majority of the year. Most oceanic climate zones, however, experience at least one snowfall per year. Snowfall
9568-403: The reservoirs are defined such that The zeroth law of thermodynamics allows this definition to be used to measure the absolute or thermodynamic temperature of an arbitrary body of interest, by making the other heat reservoir have the same temperature as the body of interest. Kelvin's original work postulating absolute temperature was published in 1848. It was based on the work of Carnot, before
9672-552: The shape of the continent. Only in Europe do they penetrate far inland, where they eventually transition into warm-summer humid continental climates ; in other continents, they are blocked by a large mountain range or limited by nearby oceans. The North Atlantic Gulf Stream , a tropical oceanic current that passes north of the Caribbean and up the East Coast of the United States to North Carolina , then heads east-northeast to
9776-453: The spectrum of their velocities often nearly obeys a theoretical law called the Maxwell–Boltzmann distribution , which gives a well-founded measurement of temperatures for which the law holds. There have not yet been successful experiments of this same kind that directly use the Fermi–Dirac distribution for thermometry, but perhaps that will be achieved in the future. The speed of sound in
9880-407: The study by methods of classical irreversible thermodynamics, a body is usually spatially and temporally divided conceptually into 'cells' of small size. If classical thermodynamic equilibrium conditions for matter are fulfilled to good approximation in such a 'cell', then it is homogeneous and a temperature exists for it. If this is so for every 'cell' of the body, then local thermodynamic equilibrium
9984-428: The transfer of matter and has a special emphasis on directly experimental procedures. A presentation of thermodynamics by Gibbs starts at a more abstract level and deals with systems open to the transfer of matter; in this development of thermodynamics, the equations (2) and (3) above are actually alternative definitions of temperature. Real-world bodies are often not in thermodynamic equilibrium and not homogeneous. For
10088-448: The tropics, a subtropical highland climate typically features mild weather year-round. Temperatures there remain relatively constant throughout the year and snowfall is seldom seen due to warmer winters than most oceanic climates. Areas with this climate feature monthly averages below 22 °C (72 °F) but above either 0 °C (32 °F) or −3 °C (27 °F) depending on isotherm used. At least one month's average temperature
10192-428: The value of the Boltzmann constant as a primarily defined reference of exactly defined value, a measurement of the speed of sound can provide a more precise measurement of the temperature of the gas. Measurement of the spectrum of electromagnetic radiation from an ideal three-dimensional black body can provide an accurate temperature measurement because the frequency of maximum spectral radiance of black-body radiation
10296-570: The vibrating and colliding atoms making up a substance. Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition. The most common scales are the Celsius scale with the unit symbol °C (formerly called centigrade ), the Fahrenheit scale (°F), and the Kelvin scale (K), with the third being used predominantly for scientific purposes. The kelvin
10400-414: The west coast of continents; hence another name for Cfb, "marine west coast climates". In addition to moderate temperatures year-round, one of the characteristics is the absence of a dry season. Except for Europe , this type of climate is confined to narrow bands of territory, largely in mid or high latitudes, although it can appear in elevated areas of continental terrain in low latitudes, e.g. plateaus in
10504-571: The year, similar to other oceanic climates, but unlike these climates, they have a high diurnal temperature variation and low humidity, owing to their inland location and relatively high elevation. Subtropical highland climates with monsoon influence ( Cwb ) have distinctive wet summers and dry winters . In locations outside the tropics, other than the drying trend in the winter, subtropical highland climates tend to be essentially identical to an oceanic climate, with mild summers and noticeably cooler winters, plus, in some instances, some snowfall. In
10608-411: The zeroth law of thermodynamics. In particular, when the body is described by stating its internal energy U , an extensive variable, as a function of its entropy S , also an extensive variable, and other state variables V , N , with U = U ( S , V , N ), then the temperature is equal to the partial derivative of the internal energy with respect to the entropy: Likewise, when
10712-421: Was defined to be exactly 273.16 K . Since May 2019, that value has not been fixed by definition but is to be measured through microscopic phenomena, involving the Boltzmann constant, as described above. The microscopic statistical mechanical definition does not have a reference temperature. A material on which a macroscopically defined temperature scale may be based is the ideal gas . The pressure exerted by
10816-411: Was that invented by Kelvin, based on a ratio of quantities of energy in processes in an ideal Carnot engine, entirely in terms of macroscopic thermodynamics. That Carnot engine was to work between two temperatures, that of the body whose temperature was to be measured, and a reference, that of a body at the temperature of the triple point of water. Then the reference temperature, that of the triple point,
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