DOI: 10.1175/JCLI-D-17-0569.1
Scopus记录号: 2-s2.0-85052784081
论文题名: Global monsoon precipitation: Trends, leading modes, and associated drought and heat wave in the Northern Hemisphere
作者: Deng K. ; Yang S. ; Ting M. ; Tan Y. ; He S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 17 起始页码: 6947
结束页码: 6966
语种: 英语
英文关键词: Climate variability
; Monsoons
; Trends
Scopus关键词: Atmospheric thermodynamics
; Climate change
; Drought
; Rain
; Atlantic multidecadal oscillations
; Climate variability
; Downward solar radiation
; Large-scale circulation
; Monsoon precipitation
; Monsoons
; Northern Hemispheres
; Trends
; Nickel compounds
英文摘要: Global monsoon precipitation (GMP) brings the majority of water for the local agriculture and ecosystem. The Northern Hemisphere (NH) GMP shows an upward trend over the past decades, while the trend in the Southern Hemisphere (SH)GMPisweak and insignificant. The first three singular value decompositionmodes betweenNH GMPand global SST during boreal summer reflect, in order, the Atlantic multidecadal oscillation (AMO), eastern Pacific (EP) ElNiño, and central Pacific (CP) El Niño, when theAMOdominates theNHclimate and contributes to the increased trend. However, the first threemodes between SHGMP and global SST during boreal winter are revealed as EP El Niño, the AMO, and CP El Niño, when the EP El Niño becomes the most significant driver of the SHGMP, and theAMO-induced rainfall anomaliesmay cancel out each other within the SHglobalmonsoon domain and thus result in a weak trend. The intensification of NH GMP is proposed to favor the occurrences of droughts and heat waves (HWs) in the midlatitudes through a monsoon-desert-like mechanism. That is, the diabatic heating associated with the monsoonal rainfall may drive large-scale circulation anomalies and trigger intensified subsidence in remote regions. The anomalous descending motions over the midlatitudes are usually accompanied by clear skies, which result in less precipitation and more downward solar radiation, and thus drier and hotter soil conditions that favor the occurrences of droughts andHWs. In comparison, the SHGMPmay exert much smaller impacts on the NH extremes in spring and summer, probably because the winter signals associated with SH GMP cannot sufficiently persist into the following seasons. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111389
Appears in Collections: 气候减缓与适应
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作者单位: School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, China; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
Recommended Citation:
Deng K.,Yang S.,Ting M.,et al. Global monsoon precipitation: Trends, leading modes, and associated drought and heat wave in the Northern Hemisphere[J]. Journal of Climate,2018-01-01,31(17)