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An aridity index (AI) is a numerical indicator of the degree of dryness of the climate at a given location. The American Meteorological Society defined it in meteorology and climatology, as "the degree to which a climate lacks effective, life-promoting moisture".
De Martonne was also secretary of the Comité D'études, which worked on fixing boundary issues following the war, especially in Romania and the Balkans. [8] [10] He was familiar with Central Europe and Romania, as he had conducted studies in the Southern Carpathians earlier in his life. [8] After that, he taught at the University of Cluj in ...
The origin of the aridity of the northern part of the diagonal is linked to two geologic events: a) the rise of the Andes — an event that led to the permanent block of both the westward flow of moisture along the tropics, and the eastward flow of moisture in Patagonia [6] and b) the permanent intrusion of cold Antarctic waters (the Humboldt ...
The ratio, Precipitation/PET, is the aridity index (AI), with an AI<0.2 indicating arid/hyperarid, and AI<0.5 indicating dry. [ 6 ] The coldest regions have not much evapotranspiration nor precipitation as there is not enough heat to evaporate much water, hence polar deserts .
Aridity ("drought") indexes that can be included in the article (after ): De Martonne Aridity Index; Emberger Aridity Index; UNEP Aridity Index; Thornthwaite Classification; Gaussen-Bagnouls Classification— Preceding unsigned comment added by 177.9.10.163 04:11, 2 September 2016 (UTC)
Thornthwaite developed four indices: the Moisture Index (Im), the aridity and humidity indexes (Ia/Ih), the Thermal Efficiency Index (TE) and the Summer Concentration of Thermal Efficiency (SCTE). Each of the four climatic types can be described by an English alphabet letter and are arranged exactly by the order shown previously. [5]
The ratio of the two, P/PET, is the aridity index. A humid subtropical climate is a zone of climate with hot and humid summers, and cold to mild winters. Subarctic regions, between 50°N [2] and 70°N latitude, have short, mild summers and freezing winters depending on local climates. Precipitation and evapotranspiration is low (compared to ...
Rules are provided for combining the stress (table 3) and humidity groups (table 2) to check a box classifying the humidity and aridity for each month. For each of six possible indicators, the number of months where that indicator was checked are added up, giving a yearly total. Schematic Design Recommendations. The yearly totals in table 4 ...