期刊
CLIMATE DYNAMICS
卷 32, 期 2-3, 页码 429-440出版社
SPRINGER
DOI: 10.1007/s00382-008-0387-5
关键词
Climate change and variability; DTR; Cloud cover; Precipitation; Land cover
资金
- NSF [ATM-0720619]
- DOE [DE-FG02-01ER63198]
- National Natural Science Foundation of China [40405018, 40225013]
- Foundation of Jiangsu Key Laboratory of Meteorological Disaster [KLME050205]
- NUIST, China
- Ministry of Education and State Administration for Foreign Experts Affairs of China
- National Center for Atmospheric Research
- National Science Foundation
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 (T (min)) and DTR exhibit significant spatial correlations with the climatological values of these three variables, while such correlation for annual maximum temperature (T (max)) is very weak. In general, the magnitude of the downward trend of DTR and the warming trend of T (min) decreases with increasing precipitation amount, cloud cover, and LAI, i.e., with stronger DTR decreasing trends over drier regions. Such spatial dependence of T (min) 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.
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