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DOI: 10.1002/joc.5781
Scopus ID: 2-s2.0-85052938417
Title:
Changes in aridity and its driving factors in China during 1961–2016
Author: Liu L.; Wang Y.; You N.; Liang Z.; Qin D.; Li S.
Source Publication: International Journal of Climatology
ISSN: 8998418
Indexed By: SCI ; SCI-E ; EI
Publishing Year: 2019
Volume: 39, Issue:1
pages begin: 50
pages end: 60
Language: 英语
Keyword: aridity ; China ; climate change ; contribution ; Penman–Monteith equation ; potential evapotranspiration
Scopus Keyword: Wetting ; Wind ; aridity ; China ; Climatic drivers ; contribution ; NorthWest China ; Potential evapotranspiration ; Potential impacts ; Relative contribution ; Climate change ; aridity ; climate change ; climate effect ; climate variation ; computer simulation ; equation ; numerical model ; trend analysis ; uncertainty analysis ; China
English Abstract: Understanding the changes in aridity is crucial because of the substantial impacts it can have on human society. However, realistic aridity changes and their underlying climatic mechanisms demonstrate large uncertainties in China. Here we adopted the aridity index (AI) to assess the aridity changes in China, and we quantified the relative contributions of various climatic drivers (the precipitation, net radiation, wind speed, relative humidity, and air temperature) to AI changes based on the station data during 1961–2016. Our results showed that the arid/semi-arid northwest China and Tibet Plateau experienced wetting trends, while western sub-humid north and northeast China and western humid south China exhibited drying trends during 1961–2016. The dominant climatic drivers involved in the changing AI trends changed from arid to humid regions. In arid northwest China, increasing precipitation and decreasing wind speeds contributed the most to the wetting trends (0.024 and 0.017 in 56 years, respectively). In the semi-arid Tibet Plateau, increasing precipitation dominated the wetting trends (0.045 in 56 years). However, in sub-humid/humid north and northeast China and south China, decreasing wind speed and net radiation dominated the annual AI changes (0.061 and 0.092 in 56 years, respectively). In addition, AI of northwest China and the Tibet Plateau exhibited a significant abrupt change in 1987 and exhibited wetter states afterwards, which could be caused by the abrupt increase in precipitation in 1987. This study could improve current understanding of the aridity changes in China and help adapt its potential impacts. © 2018 Royal Meteorological Society
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Document Type: 期刊论文
Identifier: http://119.78.100.177/globalchange/handle/2HF3EXSE/116659
Appears in Collections:全球变化的国际研究计划

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Affiliation: College of Urban and Environmental Sciences, Peking University, Beijing, China; Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, China; National Climate Center, China Meteorological Administration, Beijing, China; State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China

Recommended Citation:
Liu L.,Wang Y.,You N.,et al. Changes in aridity and its driving factors in China during 1961–2016[J]. International Journal of Climatology,2019-01-01,39(1)
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