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- Microthermal abstract "In climatology, the term microthermal is used to denote the continental climates of Eurasia and North America.The word microthermal is derived from two Greek words meaning "small" and "heat". This is misleading, however, since the term is intended to describe only the temperature conditions that prevail during the winter months, rather than those of the entire year.The characteristic feature of the microthermal climate is cold winters — specifically, winters that are cold enough to ensure that snow will remain on the ground continuously for a fixed period of time every year. Conceptually, an average temperature of 0°C or colder is assumed to be necessary to bring this about; thus the climate of a location where at least one full month is this cold is classified as microthermal (however, at least one month in the summer must average 10°C or higher; otherwise the climate would be reckoned as polar). This definition places all of the world's microthermal climates in the Northern Hemisphere, as the absence of broad land masses at upper-middle latitudes in the Southern Hemisphere precludes the existence of such temperature conditions there.Microthermal climates are typically subdivided into three categories based on the temperature characteristics of the summer season. The southernmost of the three is frequently referred to as the temperate continental climate, and has hot summers — that is to say, at least one month has an average temperature of 22°C (71.6°F) or above. The middle zone is often labelled hemiboreal, and no summer month there has an average temperature as warm as 22°C, but at least four months will average 10°C (50°F) or higher. The northernmost of the three microthermal zones is the subarctic, or boreal zone; there only one to three months will have average temperatures of at least 10°C.In North America, microthermal climates commence north of Boston along the Atlantic seaboard, this line drifting gradually southward further inland, reaching approximately 38° at the eastern edge of the Rocky Mountains, then curving dramatically northward near the Pacific coast, reaching the Pacific Ocean just south of Juneau, Alaska. In Asia, the latitude at which these climates begin is several degrees lower due to the pervasive influence of the vast Siberian anticyclone, or high-pressure system, and in continental Europe the line actually runs longitudinally rather than latitudinally, cutting through central Poland after beginning north of the Arctic Circle along the Norwegian coast, thereafter moving diagonally across Scandinavia.The boundary between the microthermal and polar climate zones is farthest north in western Europe (actually within the Arctic Circle there), and farthest south along the east coast of North America (at about 56° North latitude on the central coast of Labrador); it then trends northward across Canada before dropping south again as it courses through Alaska. Throughout most of Siberia, the boundary tends to follow the Arctic Circle fairly closely.In addition to having various summer temperature regimes, microthermal climates also differ from one another in how much precipitation they receive — such climates may be humid, semiarid or arid. Most of the Turkestan-Gobi desert system has an arid microthermal climate, while the best-known example of the semiarid microthermal climate can be found in the "steppes of Central Asia" immortalized by Russian classical music composer Alexander Borodin.".
- Microthermal wikiPageExternalLink x5375e02.htm.
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- Microthermal wikiPageOutDegree "40".
- Microthermal wikiPageRevisionID "640539892".
- Microthermal wikiPageWikiLink Alaska.
- Microthermal wikiPageWikiLink Alexander_Borodin.
- Microthermal wikiPageWikiLink Arctic_Circle.
- Microthermal wikiPageWikiLink Arid.
- Microthermal wikiPageWikiLink Asia.
- Microthermal wikiPageWikiLink Boreal_ecosystem.
- Microthermal wikiPageWikiLink Canada.
- Microthermal wikiPageWikiLink Category:Climatology.
- Microthermal wikiPageWikiLink Central_Asia.
- Microthermal wikiPageWikiLink Classical_music.
- Microthermal wikiPageWikiLink Climatology.
- Microthermal wikiPageWikiLink Composer.
- Microthermal wikiPageWikiLink Continental_climate.
- Microthermal wikiPageWikiLink Eurasia.
- Microthermal wikiPageWikiLink Europe.
- Microthermal wikiPageWikiLink European_classical_music.
- Microthermal wikiPageWikiLink Gobi_Desert.
- Microthermal wikiPageWikiLink Greek_language.
- Microthermal wikiPageWikiLink Hemiboreal.
- Microthermal wikiPageWikiLink Humid.
- Microthermal wikiPageWikiLink Humid_continental.
- Microthermal wikiPageWikiLink Humid_continental_climate.
- Microthermal wikiPageWikiLink Humidity.
- Microthermal wikiPageWikiLink Juneau,_Alaska.
- Microthermal wikiPageWikiLink Köppen_climate_classification.
- Microthermal wikiPageWikiLink Labrador.
- Microthermal wikiPageWikiLink Megathermal.
- Microthermal wikiPageWikiLink Mesothermal.
- Microthermal wikiPageWikiLink North_America.
- Microthermal wikiPageWikiLink Northern_Hemisphere.
- Microthermal wikiPageWikiLink Pacific_Ocean.
- Microthermal wikiPageWikiLink Poland.
- Microthermal wikiPageWikiLink Polar_climate.
- Microthermal wikiPageWikiLink Precipitation.
- Microthermal wikiPageWikiLink Precipitation_(meteorology).
- Microthermal wikiPageWikiLink Rocky_Mountains.
- Microthermal wikiPageWikiLink Russia.
- Microthermal wikiPageWikiLink Scandinavia.
- Microthermal wikiPageWikiLink Semi-arid_climate.
- Microthermal wikiPageWikiLink Semiarid.
- Microthermal wikiPageWikiLink Siberia.
- Microthermal wikiPageWikiLink Snow.
- Microthermal wikiPageWikiLink Southern_Hemisphere.
- Microthermal wikiPageWikiLink Steppe.
- Microthermal wikiPageWikiLink Temperature.
- Microthermal wikiPageWikiLinkText "Microthermal".
- Microthermal wikiPageWikiLinkText "microthermal".
- Microthermal hasPhotoCollection Microthermal.
- Microthermal subject Category:Climatology.
- Microthermal type Science.
- Microthermal comment "In climatology, the term microthermal is used to denote the continental climates of Eurasia and North America.The word microthermal is derived from two Greek words meaning "small" and "heat".".
- Microthermal label "Microthermal".
- Microthermal sameAs m.04xpgn.
- Microthermal sameAs Q6840413.
- Microthermal sameAs Q6840413.
- Microthermal wasDerivedFrom Microthermal?oldid=640539892.
- Microthermal isPrimaryTopicOf Microthermal.