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A New Perspective on Recent Global Warming: Asymmetric Trends of Daily Maximum and Minimum Temperature

A New Perspective on Recent Global Warming: Asymmetric Trends of Daily Maximum and Minimum... Monthly mean maximum and minimum temperatures for over 50 (10) of the Northern (Southern) Hemisphere landmass, accounting for 37 of the global landmass, indicate that the rise of the minimum temperature has occurred at a rate three times that of the maximum temperature during the period 195190 (0.84C versus 0.28C). The decrease of the diurnal temperature range is approximately equal to the increase of mean temperature. The asymmetry is detectable in all seasons and in most of the regions studied.The decrease in the daily temperature range is partially related to increases in cloud cover. Furthermore, a large number of atmospheric and surface boundary conditions are shown to differentially affect the maximum and minimum temperature. Linkages of the observed changes in the diurnal temperature range to large-scale climate forcings, such as anthropogenic increases in sulfate aerosols, greenhouse gases, or biomass burning (smoke), remain tentative. Nonetheless, the observed decrease of the diurnal temperature range is clearly important, both scientifically and practically. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the American Meteorological Society American Meteorological Society

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References (28)

Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0477
DOI
10.1175/1520-0477(1993)074<1007:ANPORG>2.0.CO;2
Publisher site
See Article on Publisher Site

Abstract

Monthly mean maximum and minimum temperatures for over 50 (10) of the Northern (Southern) Hemisphere landmass, accounting for 37 of the global landmass, indicate that the rise of the minimum temperature has occurred at a rate three times that of the maximum temperature during the period 195190 (0.84C versus 0.28C). The decrease of the diurnal temperature range is approximately equal to the increase of mean temperature. The asymmetry is detectable in all seasons and in most of the regions studied.The decrease in the daily temperature range is partially related to increases in cloud cover. Furthermore, a large number of atmospheric and surface boundary conditions are shown to differentially affect the maximum and minimum temperature. Linkages of the observed changes in the diurnal temperature range to large-scale climate forcings, such as anthropogenic increases in sulfate aerosols, greenhouse gases, or biomass burning (smoke), remain tentative. Nonetheless, the observed decrease of the diurnal temperature range is clearly important, both scientifically and practically.

Journal

Bulletin of the American Meteorological SocietyAmerican Meteorological Society

Published: Jun 1, 1993

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