Spatial dependence of diurnal temperature range trends on precipitation from 1950 to 2004

Liming Zhou, Aiguo Dai, Yongjiu Dai, Russell S. Vose, Cheng Zhi Zou, Yuhong Tian, Haishan Chen

Research output: Contribution to journalArticlepeer-review

159 Scopus citations

Abstract

This paper analyzes the spatial dependence of annual diurnal temperature range (DTR) trends from 1950-2004 on the annual climatology of three variables: Precipitation, cloud cover, and leaf area index (LAI), by classifying the global land into various climatic regions based on the climatological annual precipitation. The regional average trends for annual minimum temperature (Tmin) and DTR exhibit significant spatial correlations with the climatological values of these three variables, while such correlation for annual maximum temperature (Tmax) is very weak. In general, the magnitude of the downward trend of DTR and the warming trend of Tmin decreases with increasing precipitation amount, cloud cover, and LAI, i.e., with stronger DTR decreasing trends over drier regions. Such spatial dependence of Tmin and DTR trends on the climatological precipitation possibly reflects large-scale effects of increased global greenhouse gases and aerosols (and associated changes in cloudiness, soil moisture, and water vapor) during the later half of the twentieth century.

Original languageEnglish
Pages (from-to)429-440
Number of pages12
JournalClimate Dynamics
Volume32
Issue number2-3
DOIs
StatePublished - 2009

Keywords

  • Climate change and variability
  • Cloud cover
  • DTR
  • Land cover
  • Precipitation

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