Increased diurnal temperature range in global drylands in more recent decades

Author:

Daramola Mojolaoluwa T.12ORCID,Li Renqiang1,Xu Ming134

Affiliation:

1. Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China

2. University of Chinese Academy of Sciences Beijing China

3. BNU‐HKUST Laboratory for Green Innovation, Advanced Institute of Natural Sciences Beijing Normal University at Zhuhai Zhuhai China

4. Jiangmen Laboratory of Carbon Science and Technology Hong Kong University of Science and Technology Jiangmen China

Abstract

AbstractThe diurnal temperature range (DTR) has generally decreased at global scale according to the IPCC reports and previous publications. Here, we examined the change in DTR within the past four decades and found that DTR decreased in wet areas, but it increased in dry areas. This is because the daily minimum air temperature (Tmin) increased at a slower rate than the daily maximum air temperature (Tmax) in the dry areas, while it increased more rapidly in the wet areas. The changes in cloud cover, water vapour and moisture flux were observed to have contributed to the observed change in DTR. The change in moisture flux largely contributed to this change through the indirect effect on the change in water vapour across the aridity gradient. The significant impact of moisture flux is linked to the differential change in moisture flux between the dry and wet zones.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Publisher

Wiley

Subject

Atmospheric Science

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