DOI: 10.1002/joc.5682
论文题名: Decadal changes in summer precipitation over arid northwest China and associated atmospheric circulations
作者: Li M. ; Ma Z.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 12 起始页码: 4496
结束页码: 4508
语种: 英语
英文关键词: arid northwest China
; decadal variability
; moisture transport
; summer precipitation
Scopus关键词: Arid regions
; Climatology
; Moisture
; Precipitation (meteorology)
; Water vapor
; Anticyclonic circulation
; Atmospheric circulation
; Decadal variability
; Large-scale circulation
; Moisture transport
; NorthWest China
; Precipitation variability
; Summer precipitation
; Environmental impact
; arid region
; atmospheric circulation
; atmospheric transport
; decadal variation
; moisture transfer
; precipitation (climatology)
; precipitation assessment
; regional climate
; seasonality
; summer
; water vapor
; China
; Indian Ocean
英文摘要: The precipitation over arid regions may be low, but its environmental impacts can be very dramatic. The decadal variability in precipitation can also effectively disturb climatic environmental regimes. To advance the understanding of precipitation variability over arid regions, this paper focuses on decadal variability in summer precipitation over arid northwest China and its associated atmospheric circulations, using observation-based data and atmospheric reanalysis during the period 1961–2016. The results show that climatologically, precipitation over this region has a strong seasonality and that 60.2% falls in summer. The summer precipitation increased 15.5 mm, accounting for 52.4% of the total annual increase in this part of China from 1961 to 2016. Decadal changes in summer precipitation occurred in approximately 1991 with a north–south difference structure modulated by large-scale circulation anomalies over the Indian Ocean and central Asia as well as a shift in water vapour transport. In a positive phase, anticyclonic circulation anomalies occupy the Indian Ocean with cyclonic anomalies over central Asia, favouring stronger northwards moisture transport towards northwest China, and vice versa. Moreover, the significantly enhanced northwards water vapour transport from low-latitude seas is also critical to the decadal changes approximately in 1991 summer precipitation in arid northwest China. These findings contribute to the understanding of decadal precipitation variability over arid regions, especially the increasing influence of low-latitude circulations and moisture transport processes. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116786
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Li M.,Ma Z.. Decadal changes in summer precipitation over arid northwest China and associated atmospheric circulations[J]. International Journal of Climatology,2018-01-01,38(12)