Temperature trends in regions affected by increasing aridity/humidity

Details Temperature trends in regions affected by increasing aridity/humidity Temperature trends in regions affected by increasing aridity/humidity

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3919j&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 20, p. 3919-3922

Physics

2

Global Change, Global Change: Climate Dynamics, Global Change: Impact Phenomena, Hydrology: Desertification

Scientific paper

A paper in 1991 claimed that regions affected by desertification experience warming trends relative to neighboring areas. To assess this, an index of aridity/humidity based on the ratio of annual precipitation to annual potential evapotranspiration totals (P/PET) is developed. This index is used to define regions experiencing increases (and those where the increase is statistically significant) in aridity and humidity. We also consider regions always arid (average values of P/PET<0.5) and always humid (P/PET>2.0). Trends of average annual and summer surface air temperature are then calculated for regions in the various aridity/humidity categories and compared to most of the rest of the world's land areas equatorward of 60°. The results indicate that most of the differences in trends between categories are not statistically significant.

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