Wikipedia

Köppen climate classification

(Redirected from Continental air mass)

The Köppen climate classification divides climates into five main climate groups, with each group being divided based on patterns of seasonal precipitation and temperature. The five main groups are A (tropical), B (arid), C (temperate), D (continental), and E (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the E group are assigned a seasonal precipitation subgroup (the second letter). For example, Af indicates a tropical rainforest climate. The system assigns a temperature subgroup for all groups other than those in the A group, indicated by the third letter for climates in B, C, D, and the second letter for climates in E. For example, Cfb indicates an oceanic climate with warm summers as indicated by the ending b. Climates are classified based on specific criteria unique to each climate type.[1]

The Köppen climate classification is the most widely used climate classification scheme.[2] It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884,[3][4] with several later modifications by Köppen, notably in 1918 and 1936.[5][6] Later, German climatologist Rudolf Geiger (1894–1981) introduced some changes to the classification system in 1954 and 1961, which is thus sometimes called the Köppen–Geiger climate classification.[7][8]

As Köppen designed the system based on his experience as a botanist, his main climate groups are based on the types of vegetation occurring in a given climate classification region. In addition to identifying climates, the system can be used to analyze ecosystem conditions and identify the main types of vegetation within climates. Due to its association with the plant life of a given region, the system is useful in predicting future changes of plant life within that region.[9]

The Köppen climate classification system was modified further within the Trewartha climate classification system in 1966 (revised in 1980). The Trewartha system sought to create a more refined middle latitude climate zone, which was one of the criticisms of the Köppen system (the climate group C was too general).[10]: 200–1 

Köppen–Geiger climate map 1991–2020[9]
  Af
  Am
  Aw
  As
  BWh
  BWk
  BSh
  BSk
  Csa
  Csb
  Csc
  Cwa
  Cwb
  Cwc
  Cfa
  Cfb
  Cfc
  Dsa
  Dsb
  Dsc
  Dsd
  Dwa
  Dwb
  Dwc
  Dwd
  Dfa
  Dfb
  Dfc
  Dfd
  ET
  EF

Overview

edit
Köppen climate classification scheme symbols description table[9][1][11]
1st 2nd 3rd
A (Tropical)
  • f (Rainforest)
  • m (Monsoon)
  • w (Savanna, dry winter)
  • s (Savanna, dry summer)
B (Dry)
  • W (Arid desert)
  • S (Semi-arid steppe)
  • h (Hot)
  • k (Cold)
C (Temperate)
  • w (Dry winter)
  • f (No dry season)
  • s (Dry summer)
  • a (Hot summer)
  • b (Warm summer)
  • c (Cold summer)
D (Continental)
  • w (Dry winter)
  • f (No dry season)
  • s (Dry summer)
  • a (Hot summer)
  • b (Warm summer)
  • c (Cold summer)
  • d (Very cold winter)
E (Polar)
  • T (Tundra)
  • F (Ice cap)

The Köppen climate classification scheme divides climates into five main climate groups: A (tropical), B (arid), C (temperate), D (continental), and E (polar).[12] The second letter indicates the seasonal precipitation type, while the third letter indicates the level of heat.[13] Summers are defined as the six-month period that is warmer either from April to September and/or October to March, while winter is the six-month period that is cooler.[9][11]

Group A: Tropical climates

edit

Tropical climates have an average temperature of 18 °C (64.4 °F) or higher every month of the year, with significant precipitation.[9][11]

  • Af = Tropical rainforest climate; average precipitation of at least 60 mm (2.4 in) in every month.
  • Am = Tropical monsoon climate; driest month (which nearly always occurs at or soon after the "winter" solstice for that side of the equator) with precipitation less than 60 mm (2.4 in), but at least  .[9][11]
  • Aw or As = Tropical wet and dry or savanna climate; with the driest month having precipitation less than 60 mm (2.4 in) and less than  .[9][11]

Group B: Desert and semi-arid climates

edit

Desert and semi-arid climates are defined by low precipitation in a region that does not fit the polar (EF or ET) criteria of no month with an average temperature greater than 10 °C (50 °F).

The precipitation threshold in millimeters is determined by multiplying the average annual temperature in Celsius by 20, then adding:

  1. 280 if 70% or more of the total precipitation is in the spring and summer months (April–September in the Northern Hemisphere, or October–March in the Southern), or
  2. 140 if 30%–70% of the total precipitation is received during the spring and summer, or
  3. 0 if less than 30% of the total precipitation is received during the spring and summer.

If the annual precipitation is less than 50% of this threshold, the classification is BW (arid: desert climate); if it is in the range of 50%–100% of the threshold, the classification is BS (semi-arid: steppe climate).[9][11]

A third letter can be included to indicate temperature. Here, h signifies low-latitude climates (average annual temperature above 18 °C (64.4 °F)) while k signifies middle-latitude climates (average annual temperature less than 18 °C). In addition, n is used to denote a climate characterized by frequent fog and H for high altitudes.[14][15][16]

Group C: Temperate climates

edit

Temperate climates have the coldest month averaging between 0 °C (32 °F)[11] (or −3 °C (26.6 °F))[1] and 18 °C (64.4 °F) and at least one month averaging above 10 °C (50 °F).[11][1] For the distribution of precipitation in locations that both satisfy a dry summer (Cs) and a dry winter (Cw), a location is considered to have a wet summer (Cw) when more precipitation falls within the summer months than the winter months while a location is considered to have a dry summer (Cs) when more precipitation falls within the winter months.[11] This additional criterion applies to locations that satisfies both Ds and Dw as well.[11]

  • Cfa = Humid subtropical climate; coldest month averaging above 0 °C (32 °F) (or −3 °C (26.6 °F)), at least one month's average temperature above 22 °C (71.6 °F), and at least four months averaging above 10 °C (50 °F). No significant precipitation difference between seasons (neither the abovementioned set of conditions fulfilled).
  • Cfb = Temperate oceanic climate or subtropical highland climate; coldest month averaging above 0 °C (32 °F) (or −3 °C (26.6 °F)), all months with average temperatures below 22 °C (71.6 °F), and at least four months averaging above 10 °C (50 °F). No significant precipitation difference between seasons (neither the abovementioned set of conditions fulfilled).
  • Cfc = Subpolar oceanic climate; coldest month averaging above 0 °C (32 °F) (or −3 °C (26.6 °F)) and 1–3 months averaging above 10 °C (50 °F). No significant precipitation difference between seasons (neither the abovementioned set of conditions fulfilled).
  • Cwa = Monsoon-influenced humid subtropical climate; coldest month averaging above 0 °C (32 °F) (or −3 °C (26.6 °F)), at least one month's average temperature above 22 °C (71.6 °F), and at least four months averaging above 10 °C (50 °F). At least ten times as much rain in the wettest month of summer as in the driest month of winter.
  • Cwb = Subtropical highland climate or Monsoon-influenced temperate oceanic climate; coldest month averaging above 0 °C (32 °F) (or −3 °C (26.6 °F)), all months with average temperatures below 22 °C (71.6 °F), and at least four months averaging above 10 °C (50 °F). At least ten times as much rain in the wettest month of summer as in the driest month of winter.
  • Cwc = Cold subtropical highland climate or Monsoon-influenced subpolar oceanic climate; coldest month averaging above 0 °C (32 °F) (or −3 °C (26.6 °F)) and 1–3 months averaging above 10 °C (50 °F). At least ten times as much rain in the wettest month of summer as in the driest month of winter.
  • Csa = Hot-summer Mediterranean climate; coldest month averaging above 0 °C (32 °F) (or −3 °C (26.6 °F)), at least one month's average temperature above 22 °C (71.6 °F), and at least four months averaging above 10 °C (50 °F). At least three times as much precipitation in the wettest month of winter as in the driest month of summer, and the driest month of summer receives less than 40 mm (1.6 in).[9]
  • Csb = Warm-summer Mediterranean climate; coldest month averaging above 0 °C (32 °F) (or −3 °C (26.6 °F)), all months with average temperatures below 22 °C (71.6 °F), and at least four months averaging above 10 °C (50 °F). At least three times as much precipitation in the wettest month of winter as in the driest month of summer, and the driest month of summer receives less than 40 mm (1.6 in).[9]
  • Csc = Cold-summer Mediterranean climate; coldest month averaging above 0 °C (32 °F) (or −3 °C (26.6 °F)) and 1–3 months averaging above 10 °C (50 °F). At least three times as much precipitation in the wettest month of winter as in the driest month of summer, and the driest month of summer receives less than 40 mm (1.6 in).[9]

Group D: Continental climates

edit

Continental climates have at least one month averaging below 0 °C (32 °F) (or −3 °C (26.6 °F)) and at least one month averaging above 10 °C (50 °F).[11][1]

  • Dfa = Hot-summer humid continental climate; coldest month averaging below 0 °C (32 °F) (or −3 °C (26.6 °F)), at least one month's average temperature above 22 °C (71.6 °F), and at least four months averaging above 10 °C (50 °F). No significant precipitation difference between seasons (neither the abovementioned set of conditions fulfilled).
  • Dfb = Warm-summer humid continental climate; coldest month averaging below 0 °C (32 °F) (or −3 °C (26.6 °F)), all months with average temperatures below 22 °C (71.6 °F), and at least four months averaging above 10 °C (50 °F). No significant precipitation difference between seasons (neither the abovementioned set of conditions fulfilled).
  • Dfc = Subarctic climate; coldest month averaging below 0 °C (32 °F) (or −3 °C (26.6 °F)) and 1–3 months averaging above 10 °C (50 °F). No significant precipitation difference between seasons (neither the abovementioned set of conditions fulfilled).
  • Dfd = Extremely cold subarctic climate; coldest month averaging below −38 °C (−36.4 °F) and 1–3 months averaging above 10 °C (50 °F). No significant precipitation difference between seasons (neither the abovementioned set of conditions fulfilled).
  • Dwa = Monsoon-influenced hot-summer humid continental climate; coldest month averaging below 0 °C (32 °F) (or −3 °C (26.6 °F)), at least one month's average temperature above 22 °C (71.6 °F), and at least four months averaging above 10 °C (50 °F). At least ten times as much rain in the wettest month of summer as in the driest month of winter.
  • Dwb = Monsoon-influenced warm-summer humid continental climate; coldest month averaging below 0 °C (32 °F) (or −3 °C (26.6 °F)), all months with average temperatures below 22 °C (71.6 °F), and at least four months averaging above 10 °C (50 °F). At least ten times as much rain in the wettest month of summer as in the driest month of winter.
  • Dwc = Monsoon-influenced subarctic climate; coldest month averaging below 0 °C (32 °F) (or −3 °C (26.6 °F)) and 1–3 months averaging above 10 °C (50 °F). At least ten times as much rain in the wettest month of summer as in the driest month of winter.
  • Dwd = Monsoon-influenced extremely cold subarctic climate; coldest month averaging below −38 °C (−36.4 °F) and 1–3 months averaging above 10 °C (50 °F). At least ten times as much rain in the wettest month of summer as in the driest month of winter.
  • Dsa = Mediterranean-influenced hot-summer humid continental climate; coldest month averaging below 0 °C (32 °F) (or −3 °C (26.6 °F)), average temperature of the warmest month above 22 °C (71.6 °F) and at least four months averaging above 10 °C (50 °F). At least three times as much precipitation in the wettest month of winter as in the driest month of summer, and the driest month of summer receives less than 30 mm (1.2 in).
  • Dsb = Mediterranean-influenced warm-summer humid continental climate; coldest month averaging below 0 °C (32 °F) (or −3 °C (26.6 °F)), average temperature of the warmest month below 22 °C (71.6 °F) and at least four months averaging above 10 °C (50 °F). At least three times as much precipitation in the wettest month of winter as in the driest month of summer, and the driest month of summer receives less than 30 mm (1.2 in).
  • Dsc = Mediterranean-influenced subarctic climate; coldest month averaging below 0 °C (32 °F) (or −3 °C (26.6 °F)) and 1–3 months averaging above 10 °C (50 °F). At least three times as much precipitation in the wettest month of winter as in the driest month of summer, and the driest month of summer receives less than 30 mm (1.2 in).
  • Dsd = Mediterranean-influenced extremely cold subarctic climate; coldest month averaging below −38 °C (−36.4 °F) and 1–3 months averaging above 10 °C (50 °F). At least three times as much precipitation in the wettest month of winter as in the driest month of summer, and the driest month of summer receives less than 30 mm (1.2 in).

Group E: Polar and alpine climates

edit

Polar and alpine climates has every month of the year with an average temperature below 10 °C (50 °F).[9][11]

  • ET = Tundra climate; average temperature of warmest month between 0 °C (32 °F) and 10 °C (50 °F).[9][11]
  • EF = Ice cap climate; eternal winter, with all 12 months of the year with average temperatures below 0 °C (32 °F).[9][11]

Group A: Tropical/megathermal climates

edit
 
Tropical climate distribution

Tropical climates are characterized by constant high temperatures (at sea level and low elevations); all 12 months of the year have average temperatures of 18 °C (64.4 °F) or higher; and generally high annual precipitation. They are subdivided as follows:

Af: Tropical rainforest climate

edit
Main article: Tropical rainforest climate

All 12 months have an average precipitation of at least 60 mm (2.4 in). These climates usually occur within 10° latitude of the equator. This climate has no natural seasons in terms of thermal and moisture changes.[10] When it is dominated most of the year by the doldrums low-pressure system due to the presence of the Intertropical Convergence Zone (ITCZ) and when there are no cyclones then the climate is qualified as equatorial. When the trade winds dominate most of the year, the climate is a tropical trade-wind rainforest climate.[17]

Examples

Some of the places with this climate are indeed uniformly and monotonously wet throughout the year (e.g., the northwest Pacific coast of South and Central America, from Ecuador to Costa Rica; see, for instance, Andagoya, Colombia), but in many cases, the period of higher sun and longer days is distinctly wettest (as at Palembang, Indonesia) or the time of lower sun and shorter days may have more rain (as at Sitiawan, Malaysia). Among these places, some have a pure equatorial climate (Balikpapan, Kuala Lumpur, Kuching, Lae, Medan, Paramaribo, Pontianak, and Singapore) with the dominant ITCZ aerological mechanism and no cyclones or a subequatorial climate with occasional hurricanes (Davao, Ratnapura, Victoria).

(Note. The term aseasonal refers to the lack in the tropical zone of large differences in daylight hours and mean monthly (or daily) temperature throughout the year. Annual cyclic changes occur in the tropics, but not as predictably as those in the temperate zone, albeit unrelated to temperature, but to water availability whether as rain, mist, soil, or groundwater. Plant response (e.g., phenology), animal (feeding, migration, reproduction, etc.), and human activities (plant sowing, harvesting, hunting, fishing, etc.) are tuned to this 'seasonality'. Indeed, in tropical South America and Central America, the 'rainy season' (and the 'high water season') is called invierno (Spanish) or inverno (Portuguese), though it could occur in the Northern Hemisphere summer; likewise, the 'dry season (and 'low water season') is called verano or verão, and can occur in the Northern Hemisphere winter).

Am: Tropical monsoon climate

edit
Main article: Tropical monsoon climate

This type of climate results from the monsoon winds which change direction according to the seasons. This climate has a driest month (which nearly always occurs at or soon after the "winter" solstice for that side of the equator) with rainfall less than 60 mm (2.4 in), but at least   of average monthly precipitation.[10]: 208 

Examples

Aw/As: Tropical savanna climate

edit
Main article: Tropical savanna climate

Aw: Tropical savanna climate with dry winters

edit

Aw climates have a pronounced dry season, with the driest month having precipitation less than 60 mm (2.4 in) and less than   of average monthly precipitation.[10]: 208–211 

Examples

Most places that have this climate are found at the outer margins of the tropical zone from the low teens to the mid-20s latitudes, but occasionally an inner-tropical location (e.g., San Marcos, Antioquia, Colombia) also qualifies. The Caribbean coast, eastward from the Gulf of Urabá on the Colombia–Panama border to the Orinoco River delta, on the Atlantic Ocean (about 4,000  km), have long dry periods (the extreme is the BWh climate (see below), characterized by very low, unreliable precipitation, present, for instance, in extensive areas in the Guajira, and Coro, western Venezuela, the northernmost peninsulas in South America, which receive <300  mm total annual precipitation, practically all in two or three months).

This condition extends to the Lesser Antilles and Greater Antilles forming the circum-Caribbean dry belt. The length and severity of the dry season diminish inland (southward); at the latitude of the Amazon River—which flows eastward, just south of the equatorial line—the climate is Af. East from the Andes, between the dry, arid Caribbean and the ever-wet Amazon are the Orinoco River's Llanos or savannas, from where this climate takes its name.

As: Tropical savanna climate with dry-summers

edit

Sometimes As is used in place of Aw if the dry season occurs during the time of higher sun and longer days (during summer).[1][25] This is the case in parts of Hawaii, northwestern Dominican Republic, East Africa, southeast India and northeast Sri Lanka, and the Brazilian Northeastern Coast. In places that have this climate type, the dry season occurs during the time of lower sun and shorter days generally because of rain shadow effects during the 'high-sun' part of the year.

Examples

Group B: Arid (desert and semi-arid) climates

edit
Main articles: Desert climate and Semi-arid climate
 
Arid climate distribution

These climates are characterized by the amount of annual precipitation less than a threshold value that approximates the potential evapotranspiration.[10]: 212  The threshold value (in millimeters) is calculated as follows:

Multiply the average annual temperature in °C by 20, then add

  1. 280 if 70% or more of the total precipitation is in the high-sun half of the year (April through September in the Northern Hemisphere, or October through March in the Southern), or
  2. 140 if 30%–70% of the total precipitation is received during the applicable period, or
  3. 0 if less than 30% of the total precipitation is so received.

According to the modified Köppen classification system used by modern climatologists, total precipitation in the warmest six months of the year is taken as a reference instead of the total precipitation in the high-sun half of the year.[26]

If the annual precipitation is less than 50% of this threshold, the classification is BW (arid: desert climate); if it is in the range of 50%–100% of the threshold, the classification is BS (semi-arid: steppe climate).

A third letter can be included to indicate temperature. Here, h signifies low-latitude climate (average annual temperature above 18 °C) while k signified middle-latitude climate (average annual temperature below 18 °C).

Desert areas situated along the west coasts of continents at tropical or near-tropical locations characterized by frequent fog and low clouds, although these places rank among the driest on earth in terms of actual precipitation received, can be labeled BWn with the n denoting a climate characterized by frequent fog.[14][15][16] An equivalent BSn category can be found in foggy coastal steppes.[27]

BW: Arid climates

edit
Main article: Desert climate

BWh: Hot deserts

edit

BWk: Cold deserts

edit

BS: Semi-arid (steppe) climates

edit
Main article: Semi-arid climate

BSh: Hot semi-arid

edit

BSk: Cold semi-arid

edit

Group C: Temperate/mesothermal climates

edit
Main article: Temperate climate
 
Temperate climate distribution

In the Köppen climate system, temperate climates are defined as having an average temperature above 0 °C (32 °F) (or −3 °C (26.6 °F), as noted previously) in their coldest month but below 18 °C (64.4 °F). The average temperature of −3 °C (26.6 °F) roughly coincides with the equatorward limit of frozen ground and snow cover lasting for a month or more.

The second letter indicates the precipitation pattern—w indicates dry winters (driest winter month average precipitation less than one-tenth wettest summer month average precipitation). s indicates at least three times as much rain in the wettest month of winter as in the driest month of summer. f means significant precipitation in all seasons (neither above-mentioned set of conditions fulfilled).[9]

The third letter indicates the degree of summer heat—a indicates warmest month average temperature above 22 °C (71.6 °F) while b indicates warmest month averaging below 22 °C but with at least four months averaging above 10 °C (50.0 °F), and c indicates one to three months averaging above 10 °C (50.0 °F).[9][11][1]

Cs: Mediterranean-type climates

edit
Main article: Mediterranean climate

Csa: Hot-summer Mediterranean climates

edit

These climates usually occur on the western sides of continents between the latitudes of 30° and 45°.[40] These climates are in the polar front region in winter, and thus have moderate temperatures and changeable, rainy weather. Summers are hot and dry, due to the domination of the subtropical high-pressure systems, except in the immediate coastal areas, where summers are milder due to the nearby presence of cold ocean currents that may bring fog but prevent rain.[10]: 221–223 

Examples

Csb: Warm-summer Mediterranean climates

edit

Dry-summer climates sometimes extend to additional areas where the warmest month average temperatures do not reach 22 °C (71.6 °F), most often in the 40s latitudes. These climates are classified as Csb.[9]

Examples

Csc: Cold-summer Mediterranean climates

edit

Cold summer Mediterranean climates (Csc) exist in high-elevation areas adjacent to coastal Csb climate areas, where the strong maritime influence prevents the average winter monthly temperature from dropping below 0 °C. This climate is rare and is predominantly found in climate fringes and isolated areas of the Cascades and Andes Mountains, as the dry-summer climate extends further poleward in the Americas than elsewhere.[10] Rare instances of this climate can be found in some coastal locations in the North Atlantic and at high altitudes in Hawaii.

Examples

Cfa: Humid subtropical climates

edit
Main article: Humid subtropical climate

These climates usually occur on the eastern coasts and eastern sides of continents, usually in the high 20s and 30s latitudes. Unlike the dry summer Mediterranean climates, humid subtropical climates have a warm and wet flow from the tropics that creates warm and moist conditions in the summer months. As such, summer (not winter as is the case in Mediterranean climates) is often the wettest season.

The flow out of the subtropical highs and the summer monsoon creates a southerly flow from the tropics that brings warm and moist air to the lower east sides of continents. This flow is often what brings the frequent and strong but short-lived summer thundershowers so typical of the more southerly subtropical climates like the southeast United States, southern China, and Japan.[10]: 223–226 

Examples

Cfb: Oceanic climates

edit

Marine west coast climate

edit

Cfb climates usually occur in the higher middle latitudes on the western sides of continents; they are typically situated immediately poleward of the Mediterranean climates in the 40s and 50s latitudes. However, in southeast Australia, southeast South America, and extreme southern Africa this climate is found immediately poleward of temperate climates, on places near the coast and at a somewhat lower latitude. In western Europe, this climate occurs in coastal areas up to 68°N in Norway.

These climates are dominated all year round by the polar front, leading to changeable, often overcast weather. Summers are mild due to cool ocean currents. Winters are milder than other climates in similar latitudes, but usually very cloudy, and frequently wet. Cfb climates are also encountered at high elevations in certain subtropical and tropical areas, where the climate would be that of a subtropical/tropical rainforest if not for the altitude. These climates are called "highlands".[10]: 226–229 

Examples

Subtropical highland climate with uniform rainfall

edit
Main article: Oceanic climate § Subtropical highland variety (Cfb, Cwb)

Subtropical highland climates with uniform rainfall (Cfb) are a type of oceanic climate mainly found in the highlands of Australia, such as in or around the Great Dividing Range in the north of the state of New South Wales, and also sparsely in other continents, such as in South America, among others. Unlike a typical Cwb climate, they tend to have rainfall spread evenly throughout the year. They have characteristics of both the Cfb and Cfa climates, but unlike these climates, they have a high diurnal temperature variation and low humidity, owing to their inland location and relatively high elevation.

Examples

Cfc: Subpolar oceanic climate

edit

Subpolar oceanic climates (Cfc) occur poleward of or at higher elevations than the maritime temperate climates and are mostly confined either to narrow coastal strips on the western poleward margins of the continents, or, especially in the Northern Hemisphere, to islands off such coasts. They occur in both hemispheres, generally in the high 50s and 60s latitudes in the Northern Hemisphere and the 50s latitudes in the Southern Hemisphere.[10]

Examples

Cw: Dry-winter subtropical climates

edit

Cwa: Dry-winter humid subtropical climate

edit

Cwa is a monsoonal influenced version of the humid subtropical climate, having the classic dry winter–wet summer pattern associated with tropical monsoonal climates. They are found at similar latitudes as the Cfa climates, except in regions where monsoons are more prevalent. These regions are in the Southern Cone of South America, the Gangetic Plain of South Asia, southeastern Africa, parts of East Asia and Mexico, and Northern Vietnam of Southeast Asia.

Examples

Cwb: Dry-winter subtropical highland climate

edit

Dry-winter subtropical highland climate (Cwb) is a type of climate mainly found in highlands inside the tropics of Central America, South America, Africa, and South and Southeast Asia or areas in the subtropics. Winters are noticeable and dry, and summers can be very rainy. In the tropics, the monsoon is provoked by the tropical air masses and the dry winters by subtropical high pressure.

Examples

Cwc: Dry-winter cold subtropical highland climate

edit

Dry-winter cold subtropical highland climates (Cwc) exist in high-elevation areas adjacent to Cwb climates. This climate is rare and is found mainly in isolated locations mostly in the Andes in Bolivia and Peru, as well as in sparse mountain locations in Southeast Asia.

Group D: Continental/microthermal climates

edit
Main article: Continental climate
 
Continental climate distribution

These climates have an average temperature above 10 °C (50 °F) in their warmest months, and the coldest month average below 0 °C (or −3 °C (26.6 °F), as noted previously). These usually occur in the interiors of continents and on their upper east coasts, normally north of 40°N. In the Southern Hemisphere, group D climates are extremely rare due to the smaller land masses in the middle latitudes and the almost complete absence of land at 40–60°S, existing only in some highland locations.

Dfa/Dwa/Dsa: Hot summer humid continental climates

edit
Main article: Hot-summer humid continental climate

Dfa climates usually occur in the high 30s and low 40s latitudes, with a qualifying average temperature in the warmest month of greater than 22 °C (72 °F). In Europe, these climates tend to be much drier than in North America. Dsa exists at higher elevations adjacent to areas with hot summer Mediterranean (Csa) climates.[10]: 231–32 

These climates exist only in the Northern Hemisphere because the Southern Hemisphere has no large landmasses isolated from the moderating effects of the sea within the middle latitudes.

Examples

In eastern Asia, Dwa climates extend further south into the mid-30s latitudes due to the influence of the Siberian high-pressure system, which also causes winters there to be dry, and summers can be very wet because of monsoon circulation.

Examples

Dsa exists only at higher elevations adjacent to areas with hot summer Mediterranean (Csa) climates.

Examples

Dfb/Dwb/Dsb: Warm summer humid continental/hemiboreal climates

edit
Main article: Warm-summer humid continental climate

Dfb climates are immediately poleward of hot summer continental climates, generally in the high 40s and low 50s latitudes in North America and Asia, and also extending to higher latitudes into the high 50s and low 60s latitudes in central and eastern Europe, between the maritime temperate and continental subarctic climates.[10]

Examples

Like with all Group D climates, Dwb climates mostly only occur in the northern hemisphere.

Examples

Dsb arises from the same scenario as Dsa, but at even higher altitudes or latitudes, and chiefly in North America, since the Mediterranean climates extend further poleward than in Eurasia.

Examples

Dfc/Dwc/Dsc: Subarctic/boreal climates

edit
Main article: Subarctic climate

Dfc, Dsc and Dwc climates occur poleward of the other group D climates, or at higher altitudes, generally in the 50s and 60s latitudes.[10]: 232–235 

Examples:

Dfd/Dwd/Dsd: Subarctic/boreal climates with severe winters

edit

Places with this climate have severe winters, with the temperature in their coldest month lower than −38 °C. These climates occur only in eastern Siberia, and are the second coldest, before EF. The coldest recorded temperatures in the Northern Hemisphere belonged to this climate. The names of some of the places with this climate have become veritable synonyms for the extreme, severe winter cold.[68]

Examples

Group E: Polar climates

edit
 
Polar climate distribution

In the Köppen climate system, polar climates are defined as the warmest temperature of any month being below 10 °C (50 °F). Polar climates are further divided into two types, tundra climates and icecap climates:

ET: Tundra climate

edit

Tundra climate (ET): warmest month has an average temperature between 0 and 10 °C. These climates occur on the northern edges of the North American and Eurasian land masses (generally north of 70 °N although they may be found farther south depending on local conditions), and on nearby islands. ET climates are also found on some islands near the Antarctic Convergence, and at high elevations outside the polar regions, above the tree line.

Examples

EF: Ice cap climate

edit

Ice cap climate (EF): this climate is dominant in Antarctica, inner Greenland, and summits of many high mountains, even at lower latitudes. Monthly average temperatures never exceed 0 °C (32 °F).

Examples

Ecological significance

edit

Biomass

edit

The Köppen climate classification is based on the empirical relationship between climate and vegetation. This classification provides an efficient way to describe climatic conditions defined by temperature and precipitation and their seasonality with a single metric. Because climatic conditions identified by the Köppen classification are ecologically relevant, it has been widely used to map the geographic distribution of long-term climate and associated ecosystem conditions.[74]

Climate change

edit

Over recent years, there has been an increasing interest in using the classification to identify changes in climate and potential changes in vegetation over time.[13] The most important ecological significance of the Köppen climate classification is that it helps to predict the dominant vegetation type based on the climatic data and vice versa.[75]

In 2015, a Nanjing University paper published in Scientific Reports analyzing climate classifications found that between 1950 and 2010, approximately 5.7% of all land area worldwide had moved from wetter and colder classifications to drier and hotter classifications. The authors also found that the change "cannot be explained as natural variations but are driven by anthropogenic factors".[76]

A 2018 study provides detailed maps for present and future Köppen-Geiger climate classification maps at 1-km resolution.[77]

Other Köppen climate maps

edit

All maps use the ≥0 °C definition for the temperate-continental border.[9]

  •  
    North America
  •  
    Europe
  •  
    Russia
  •  
    Central Asia
  •  
    East Asia
  •  
    South America
  •  
    Africa
  •  
    Western Asia
  •  
    South Asia
  •  
    Southeast Asia
  •  
    Melanesia/Oceania
  •  
    Australia
  •  
    New Zealand
  •  
    World (1991–2020)
  •  
    World (2071–2099, SSP245)

See also

edit

References

edit
  1. ^ a b c d e f g Kottek, Markus; Grieser, Jürgen; Beck, Christoph; Rudolf, Bruno; Rubel, Franz (2006). "World Map of the Köppen-Geiger climate classification updated" (PDF). Meteorologische Zeitschrift. 15 (3): 259–263. Bibcode:2006MetZe..15..259K. doi:10.1127/0941-2948/2006/0130.
  2. ^ https://bigladdersoftware.com/epx/docs/9-4/auxiliary-programs/k-ppen-climate-classification.html#:~:text=The%20modified%20K%C3%B6ppen%20Climate%20Classification,averages%20of%20temperature%20and%20precipitation
  3. ^ Köppen, Wladimir (1884). "Die Wärmezonen der Erde, nach der Dauer der heissen, gemässigten und kalten Zeit und nach der Wirkung der Wärme auf die organische Welt betrachtet" [The thermal zones of the earth according to the duration of hot, moderate and cold periods and to the impact of heat on the organic world)]. Meteorologische Zeitschrift. 20 (3). Translated by Volken, E.; Brönnimann, S (published 2011): 351–360. Bibcode:2011MetZe..20..351K. doi:10.1127/0941-2948/2011/105. S2CID 209855204. Archived from the original on 8 September 2016. Retrieved 2 September 2016.
  4. ^ Rubel, F.; Kottek, M (2011). "Comments on: 'The thermal zones of the Earth' by Wladimir Köppen (1884)". Meteorologische Zeitschrift. 20 (3): 361–365. Bibcode:2011MetZe..20..361R. doi:10.1127/0941-2948/2011/0285.
  5. ^ Köppen, Wladimir (1918). "Klassification der Klimate nach Temperatur, Niederschlag and Jahreslauf". Petermanns Geographische Mitteilungen. Vol. 64. pp. 193–203, 243–248 – via koeppen-geiger.Vu-Wien.ac.at/Koeppen.htm.
  6. ^ Köppen, Wladimir (1936). "C". In Köppen, Wladimir; Geiger (publisher), Rudolf (eds.). Das geographische System der Klimate [The geographic system of climates] (PDF). Vol. 1. Berlin: Borntraeger. Archived (PDF) from the original on 4 March 2016. Retrieved 2 September 2016.
  7. ^ Geiger, Rudolf (1954). "Klassifikation der Klimate nach W. Köppen" [Classification of climates after W. Köppen]. Landolt-Börnstein – Zahlenwerte und Funktionen aus Physik, Chemie, Astronomie, Geophysik und Technik, alte Serie. Vol. 3. Berlin: Springer. pp. 603–607.
  8. ^ Geiger, Rudolf (1961). Überarbeitete Neuausgabe von Geiger, R.: Köppen-Geiger / Klima der Erde. (Wandkarte 1:16 Mill.) – Klett-Perthes, Gotha.
  9. ^ a b c d e f g h i j k l m n o p q r Beck, Hylke E.; Zimmermann, Niklaus E.; McVicar, Tim R.; Vergopolan, Noemi; Berg, Alexis; Wood, Eric F. (30 October 2018). "Present and future Köppen-Geiger climate classification maps at 1-km resolution". Scientific Data. 5: 180214. Bibcode:2018NatSD...580214B. doi:10.1038/sdata.2018.214. ISSN 2052-4463. PMC 6207062. PMID 30375988.
  10. ^ a b c d e f g h i j k l m McKnight, Tom L; Hess, Darrel (2000). "Climate Zones and Types". Physical Geography: A Landscape Appreciation. Upper Saddle River, NJ: Prentice Hall. ISBN 978-0-13-020263-5.
  11. ^ a b c d e f g h i j k l m n o Peel, M. C.; Finlayson, B. L. & McMahon, T. A. (2007). "Updated world map of the Köppen–Geiger climate classification" (PDF). Hydrology and Earth System Sciences. 11 (5): 1633–1644. Bibcode:2007HESS...11.1633P. doi:10.5194/Hess-11-1633-2007. ISSN 1027-5606.
  12. ^ "Koppen climate classification | climatology". Encyclopædia Britannica. Archived from the original on 4 August 2017. Retrieved 4 August 2017.
  13. ^ a b Chen, Hans; Chen, Deliang. "Köppen climate classification". hanschen.org. Archived from the original on 14 August 2017. Retrieved 4 August 2017.
  14. ^ a b Cereceda, P.; Larrain, H.; osses, P.; Farias, M.; Egaña, I. (2008). "The climate of the coast and fog zone in the Tarapacá Region, Atacama Desert, Chile". Atmospheric Research. 87 (3–4): 301–311. Bibcode:2008AtmRe..87..301C. doi:10.1016/j.atmosres.2007.11.011. hdl:10533/139314.
  15. ^ a b "Clasificación climática de Köppen" (in Spanish). University of Chile. Archived from the original on 22 January 2018. Retrieved 21 January 2018.
  16. ^ a b Inzunza, Juan. "Capitulo 15. Climas de Chile" (PDF). Meteorología Descriptiva y Aplicaciones en Chile (in Spanish). p. 427. Archived from the original (PDF) on 22 January 2018. Retrieved 22 January 2018.
  17. ^ Estienne, Pierre; Godard, Alain. "Chapitre XVI". Climatologie (in French). Éditions Armand Colin. pp. 308–323. ISBN 2-200-31042-0.
  18. ^ Linacre, Edward; Geerts, Bart (1997). Climates and Weather Explained. London: Routledge. p. 379. ISBN 978-0-415-12519-2.
  19. ^ "Climate Data Book of Bhutan, 2018" (PDF). National Center for Hydrology and Meteorology. Retrieved 13 July 2021.
  20. ^ "Puerto Maldonado Climate Normals 1961–1990". National Oceanic and Atmospheric Administration. Retrieved 23 April 2015.
  21. ^ a b "Experience Template" 中国气象数据网 (in Simplified Chinese). China Meteorological Administration. Retrieved 17 June 2023.
  22. ^ "Estado de Morelos-Estacion: Cuernavaca". Normales Climatologicas 1951–2010 (in Spanish). Servicio Meteorologico Nacional. Archived from the original on 3 March 2016. Retrieved 25 April 2015.
  23. ^ a b "Pure tabular statistics". ArcGIS Experience Builder. China Meteorological Administration. Retrieved 2 August 2023.
  24. ^ "World Meteorological Organization Climate Normals for 1991–2020 — Ziguinchor". National Oceanic and Atmospheric Administration. Retrieved 10 January 2024.
  25. ^ "JetStream Max: Addition Köppen-Geiger Climate Subdivisions". National Weather Service. Archived from the original on 24 December 2018. Retrieved 24 December 2018.
  26. ^ Critchfield, H.J. (1983). "Criteria for classification of major climatic types in modified Köppen system" (4 ed.). University of Idaho. Archived from the original on 30 September 2009.
  27. ^ "Atlas Agroclimático de Chile–Estado Actual y Tendencias del Clima (Tomo I: Regiones de Arica Y Parinacota, Tarapacá y Antofagasta" (in Spanish). Universidad de Chile. 2017. Archived from the original on 22 December 2018. Retrieved 9 December 2018.
  28. ^ "World Weather Information Service". worldweather.wmo.int. WMO. Retrieved 28 July 2023.
  29. ^ a b c d e f g "Valores Climatológicos Normales – España 1981–2010". Agencia Estatal de Meteorologia. AEMET. Retrieved 4 January 2024.
  30. ^ a b "Evolución de los climas de Koppen en España: 1951–2020" (PDF). Agencia Estatal de Meteorologia. AEMET. Retrieved 16 February 2024.
  31. ^ КЛИМАТ УЛАН-БАТОРА (in Russian). Pogoda.ru.net. Retrieved 4 January 2015.
  32. ^ "Estado de Nuevo Leon-Estacion: Monterrey". Normales Climatologicas 1951–2010 (in Spanish). Servicio Meteorológico Nacional. Retrieved 16 October 2021.
  33. ^ "World Weather Information Service". worldweather.wmo.int. WMO. Retrieved 27 October 2023.
  34. ^ "Clima en la Argentina: Guia Climática por Santiago del Estero Aero". Caracterización: Estadísticas de largo plazo (in Spanish). Servicio Meteorológico Nacional. Retrieved 5 April 2023.
  35. ^ "Climate Normals for Batna". Retrieved 11 February 2013.
  36. ^ "Climate data for Bloemfontein". South African Weather Service. Archived from the original on 15 March 2012. Retrieved 7 March 2010.
  37. ^ "Bolivia – Cochabamba". Sistema de Clasificación Bioclimática Mundial. Retrieved 28 January 2014.
  38. ^ "World Weather Information Service". World Weather. WMO. Retrieved 13 November 2023.
  39. ^ "World Meteorological Organization Climate Normals for 1991–2020: Sulina" (CSV). ncei.noaa.gov. NOAA. Retrieved 14 February 2024.
  40. ^ George, Melvin R. "Mediterranean Climate". UCRangelands. University of California. Archived from the original on 4 March 2016. Retrieved 26 January 2015.
  41. ^ "World Weather Information service". World Weather. WMO. Retrieved 13 November 2023.
  42. ^ "FORM 1: STATION ILAM". Iranian Meteorological Organization. Archived from the original on 8 May 2012. Retrieved 18 November 2011.
  43. ^ "Weather Information for Irbid". Jordan Meteorological. Retrieved 27 November 2016.
  44. ^ "World Meteorological Organization Climate Normals for 1991–2020: Bulgaria-Kardzhali" (CSV). NOAA. Retrieved 3 January 2024.
  45. ^ "World Weather Information Service–Tlemcen". World Meteorological Organization. Retrieved 21 October 2016.
  46. ^ "Korçë Climate Normals 1961–1990". National Oceanic and Atmospheric Administration. Retrieved 22 January 2023.
  47. ^ "Global Surface Summary of the Day – GSOD". National Oceanic and Atmospheric Administration. Retrieved 22 January 2023.
  48. ^ "Resmi İstatistikler: İllerimize Ait Mevism Normalleri (1991–2020)" (in Turkish). Turkish State Meteorological Service. Retrieved 1 May 2021.
  49. ^ "World Meteorological Organization Climate Normals for 1991–2020: Ijevan" (CSV). NOAA. Retrieved 6 March 2024.
  50. ^ "Κλιματικά Δεδομένα ανά Πόλη- ΜΕΤΕΩΓΡΑΜΜΑΤΑ, ΕΜΥ, Εθνική Μετεωρολογική Υπηρεσία". emy.gr. Retrieved 17 August 2023.
  51. ^ "Prizren: Monthly and annual means, maximum and minimum values of meteorological elements for the period 1961 – 1990". Republic Hydrometeorological Service of Serbia. Archived from the original on 20 July 2021. Retrieved 3 October 2021.
  52. ^ "Zagatala Climate Normals 1961–1990". National Oceanic and Atmospheric Administration. Retrieved 22 March 2015.
  53. ^ "Resmi İstatistikler: İllerimize Ait Genel İstatistik Verileri" (in Turkish). Turkish State Meteorological Service. Archived from the original on 22 January 2019. Retrieved 11 December 2021.
  54. ^ "World Meteorological Organization Climate Normals for 1991–2020 — Trevico". National Oceanic and Atmospheric Administration. Retrieved 3 February 2024.
  55. ^ "Pure tabular statistics". ArcGIS Experience Builder. China Meteorological Data Service Center. Retrieved 2 August 2023.
  56. ^ "World Meteorological Organization". Retrieved 7 December 2022.
  57. ^ "Pogoda.ru.net" (in Russian). Retrieved 8 November 2021.
  58. ^ "Климат Благовещенска" (in Russian). Погода и Климат. Retrieved 8 November 2021.
  59. ^ "Chirchiq, Uzbekistan Travel Weather Averages (Weatherbase)". Weatherbase. Retrieved 12 August 2024.
  60. ^ "Faiz abad Climate Normals for 1964–1983". NOAA. Retrieved 7 May 2024.
  61. ^ "Briceni Climate Normals 1991–2020". World Meteorological Organization Climatological Standard Normals (1991–2020). National Oceanic and Atmospheric Administration. Archived from the original on 21 August 2023. Retrieved 21 August 2023.
  62. ^ "World Meteorological Organization Climate Normals for 1981–2010: Dobbiaco-16033" (XLS). ncei.noaa.gov (Excel). National Oceanic and Atmosoheric Administration. Retrieved 28 February 2024.
  63. ^ I.R of Iran Shahrekord Meteorological Organization ( in Persian ).
  64. ^ "World Meteorological Organization Climate Normals for 1991–2020 – Jermuk" (CSV). NCEI. Retrieved 6 March 2024.
  65. ^ "Lysa hora Climate Normals 1991–2020". National Oceanic and Atmospheric Administration. Archived from the original on 28 August 2023. Retrieved 28 August 2023.
  66. ^ "Štrbské Pleso Climate Normals 1991–2020". World Meteorological Organization Climatological Standard Normals (1991–2020). National Oceanic and Atmospheric Administration. Archived from the original on 20 August 2023. Retrieved 20 August 2023.
  67. ^ "Tsetserleg Climate Normals 1961–1990". National Oceanic and Atmospheric Administration. Retrieved 13 January 2013.
  68. ^ "Climate Types: Types of Climate | Climatology". Geography Notes. 9 August 2017. Retrieved 17 June 2022.
  69. ^ "Anexos" (PDF). National Meteorology and Hydrology Service of Peru. Retrieved 2 January 2023.
  70. ^ "Lomnický štít Climate Normals 1991–2020". World Meteorological Organization Climatological Standard Normals (1991–2020). National Oceanic and Atmospheric Administration. Archived from the original on 20 August 2023. Retrieved 20 August 2023.
  71. ^ "Musala Peak Climate Normals 1991–2020". National Oceanic and Atmospheric Administration. Retrieved 29 August 2023.
  72. ^ "Simulated historical climate & weather data for Shimshal". meteoblue.com. Meteoblue. Retrieved 8 September 2024.
  73. ^ "World Meteorological Organization Climate Normals for 1991–2020: Sonnblick". ncei.noaa.gov. NOAA. Retrieved 16 February 2024.
  74. ^ Chen, D.; Chen, H. W. (2013). "Using the Köppen classification to quantify climate variation and change: An example for 1901–2010" (PDF). Environmental Development. 6: 69–79. doi:10.1016/j.envdev.2013.03.007. Archived (PDF) from the original on 31 October 2014. Retrieved 29 October 2014.
  75. ^ Critchfield, Howard J (1983). General Climatology (4th ed.). New Delhi: Prentice Hall. pp. 154–161. ISBN 978-81-203-0476-5.
  76. ^ Chan, D.; Wu, Q. (2015). "Significant anthropogenic-induced changes of climate classes since 1950". Scientific Reports. 5 (13487): 13487. Bibcode:2015NatSR...513487C. doi:10.1038/srep13487. PMC 4551970. PMID 26316255.
  77. ^ Beck, Hylke E.; Zimmermann, Niklaus E.; McVicar, Tim R.; Vergopolan, Noemi; Berg, Alexis; Wood, Eric F. (30 October 2018). "Present and future Köppen-Geiger climate classification maps at 1-km resolution". Scientific Data. 5 (1): 180214. Bibcode:2018NatSD...580214B. doi:10.1038/sdata.2018.214. ISSN 2052-4463. PMC 6207062. PMID 30375988. S2CID 53111021.
edit
 
Wikimedia Commons has media related to Köppen-Geiger.

Climate records

edit
Retrieved from "https://en.wikipedia.org/w/index.php?title=Köppen_climate_classification&oldid=1263517014#Group_D:_Continental/microthermal_climates"