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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".
Martonne was born on 1 April 1873 in Chabris, Indre, France, [1] and was the son-in-law of Paul Vidal de la Blache. [2] In 1892, he entered the École Normale Supérieure. [3] He graduated three years later with a degree in history and geography. [1] After that, he worked with Ferdinand von Richthofen and Albrecht Penck. [1]
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 ...
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)
Figure 3.20 on p. 175 of the IPCC Second Assessment Report Comparison of MBH99 40-year average from proxy records, as used in IPCC TAR 2001 (blue), with IPCC 1990 schematic Figure 7.1.c (red) [based on Lamb 1965 extrapolating from central England temperatures and other historical records]; central England temperatures to 2007 shown from Jones ...
Desertification is a gradual process of increased soil aridity.Desertification has been defined in the text of the United Nations Convention to Combat Desertification (UNCCD) as "land degradation in arid, semi-arid and dry sub-humid regions resulting from various factors, including climatic variations and human activities."
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 ...