Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD029533 |
Changes in Evapotranspiration Over Global Semiarid Regions 1984-2013 | |
Yang, Zesu1; Zhang, Qiang2,3; Hao, Xiaocui4; Yue, Ping2,3 | |
2019-03-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:6页码:2946-2963 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Global mean evapotranspiration (ET) has been increasing in recent decades under climate warming. Yet the magnitude and spatial distribution of ET variation remain highly uncertain. ET changes in different regions are still poorly understood due to limitations in observation records, especially in semiarid regions with undeveloped economic systems and sparse observations. Based on the Priestley-Taylor Jet Propulsion Laboratory model, ET was estimated over global typical semiarid regions for 1984-2013. All of these regions show a decreasing ET trend, which is opposite to the trend in global mean ET. In particular, North Africa has the fastest decreasing trend, 8.6 mm/year, while South Africa has the slowest decreasing trend, 0.7 mm/year. North America, South America, northern Africa, and Australia have declining trends in ET during both warm and cold seasons, while the Loess Plateau, East Asia, central Asia, and South Africa have declining trends in ET only during warm seasons. Accounting for basic factors controlling ET, three important results are identified: First, atmospheric demand is increasing over all semiarid regions due to climate warming; second, the effect of atmospheric composition and cloud weakening radiation is strengthening over all semiarid regions; and finally, annual precipitation is decreasing over all semiarid regions except for South Africa. Factorial experiments indicate that the remarkable declining trend in relative air humidity forces the decreasing trend in ET over all semiarid regions. These results imply a slowing water cycle in global semiarid regions. |
英文关键词 | climate change evapotranspiration trend PT-JPL model global semiarid areas |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000464653500006 |
WOS关键词 | TERRESTRIAL EVAPOTRANSPIRATION ; EDDY-COVARIANCE ; CLIMATE-CHANGE ; ELEVATED CO2 ; HEAT-FLUX ; LAND ; CARBON ; TEMPERATURE ; DYNAMICS ; RAINFALL |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/181706 |
专题 | 气候变化 |
作者单位 | 1.Chengdu Univ Informat Technol, Plateau Atmospher & Environm Key Lab Sichuan Prov, Coll Atmospher Sci, Chengdu, Sichuan, Peoples R China; 2.China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Reducing Disaster Ga, Lanzhou, Gansu, Peoples R China; 3.Key Open Lab Arid Climat Change & Disaster Reduct, Lanzhou, Gansu, Peoples R China; 4.Sichuan Acad Environm Sci, Chengdu, Sichuan, Peoples R China |
推荐引用方式 GB/T 7714 | Yang, Zesu,Zhang, Qiang,Hao, Xiaocui,et al. Changes in Evapotranspiration Over Global Semiarid Regions 1984-2013[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(6):2946-2963. |
APA | Yang, Zesu,Zhang, Qiang,Hao, Xiaocui,&Yue, Ping.(2019).Changes in Evapotranspiration Over Global Semiarid Regions 1984-2013.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(6),2946-2963. |
MLA | Yang, Zesu,et al."Changes in Evapotranspiration Over Global Semiarid Regions 1984-2013".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.6(2019):2946-2963. |
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