Humidity province: Difference between revisions
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<div class="definition"><div class="short_definition">In C. W. Thornthwaite's 1931 [[climatic classification]], a region in which the [[precipitation effectiveness]] of its [[climate]] produces a definite type of biological consequence, in particular the climatic climax formations of vegetation ([[rain forest]], [[tundra]], etc.).</div><br/> <div class="paragraph">Five main classes of humidity province are distinguished, bounded by values of precipitation effectiveness index (P–E index): 1) [[wet]] or rain forest; 2) [[humid]] or forest; 3) [[subhumid]] or grassland; 4) [[semiarid]] or steppe; and 5) [[arid]] or desert. Thornthwaite (1948) used values of [[moisture index]] to limit similar but purely climatic (nonbiological) zones as follows: 1) [[perhumid]]; 2) humid; 3) subhumid; 4) semiarid; and 5) arid. The [[moist climates]] are those with a positive moisture index; [[dry climates]] have negative values. <br/>''Compare'' [[hyetal region]], [[climatic province]], [[temperature province]].</div><br/></div><div class="reference">Thornthwaite, C. W. 1931. The climates of North America according to a new classification. Geogr. Rev.. 21. 633–655. </div><br/> <div class="reference">Thornthwaite, C. W. 1948. An approach toward a rational classification of climate. Geogr. Rev.. 38. 55–94. </div><br/> | <div class="definition"><div class="short_definition">In C. W. Thornthwaite's 1931 [[climatic classification]], a region in which the [[precipitation effectiveness]] of its [[climate]] produces a definite type of biological consequence, in particular the climatic climax formations of vegetation ([[rain forest]], [[tundra]], etc.).</div><br/> <div class="paragraph">Five main classes of humidity province are distinguished, bounded by values of precipitation effectiveness index (P–E index): 1) [[wet climate|wet]] or rain forest; 2) [[humid climate|humid]] or forest; 3) [[subhumid climate|subhumid]] or grassland; 4) [[semiarid climate|semiarid]] or steppe; and 5) [[arid climate|arid]] or desert. Thornthwaite (1948) used values of [[moisture index]] to limit similar but purely climatic (nonbiological) zones as follows: 1) [[perhumid climate|perhumid]]; 2) humid; 3) subhumid; 4) semiarid; and 5) arid. The [[moist climates]] are those with a positive moisture index; [[dry climates]] have negative values. <br/>''Compare'' [[hyetal region]], [[climatic province]], [[temperature province]].</div><br/></div><div class="reference">Thornthwaite, C. W. 1931. The climates of North America according to a new classification. Geogr. Rev.. 21. 633–655. </div><br/> <div class="reference">Thornthwaite, C. W. 1948. An approach toward a rational classification of climate. Geogr. Rev.. 38. 55–94. </div><br/> | ||
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Latest revision as of 16:09, 25 April 2012
humidity province
In C. W. Thornthwaite's 1931 climatic classification, a region in which the precipitation effectiveness of its climate produces a definite type of biological consequence, in particular the climatic climax formations of vegetation (rain forest, tundra, etc.).
Five main classes of humidity province are distinguished, bounded by values of precipitation effectiveness index (P–E index): 1) wet or rain forest; 2) humid or forest; 3) subhumid or grassland; 4) semiarid or steppe; and 5) arid or desert. Thornthwaite (1948) used values of moisture index to limit similar but purely climatic (nonbiological) zones as follows: 1) perhumid; 2) humid; 3) subhumid; 4) semiarid; and 5) arid. The moist climates are those with a positive moisture index; dry climates have negative values.
Compare hyetal region, climatic province, temperature province.
Compare hyetal region, climatic province, temperature province.
Thornthwaite, C. W. 1931. The climates of North America according to a new classification. Geogr. Rev.. 21. 633–655.
Thornthwaite, C. W. 1948. An approach toward a rational classification of climate. Geogr. Rev.. 38. 55–94.
