干旱区生态环境知识资源中心(Arid): Precipitation over semi-arid regions of North Hemisphere affected by Atlantic Multidecadal Oscillation

Arid

DOI	10.1016/j.atmosres.2021.105801
	Precipitation over semi-arid regions of North Hemisphere affected by Atlantic Multidecadal Oscillation
	Zhu, Kaiwei; Guan, Xiaodan; Huang, Jianping; Wang, Jiamin; Guo, Shuyang; Cao, Chenyu
通讯作者	Guan, XD (corresponding author), Lanzhou Univ, Minist Educ, Coll Atmospher Sci, Key Lab Semi Arid Climate Change, Lanzhou, Peoples R China. ; Guan, XD (corresponding author), Collaborat Innovat Ctr Western Ecol Safety, Lanzhou, Peoples R China.
来源期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
EISSN	1873-2895
出版年	2021
卷号	262
英文摘要	As a key variable in climate change over semi-arid regions, precipitation variation has received much attention from the public, but the local mechanisms involved are still not fully understood. The results presented in this study show as the Atlantic Multidecadal Oscillation (AMO) underwent a phase transition from the negative to a positive phase in the past 30 years, precipitation over the areas with annual precipitation below 400 mm decreased, while the areas with annual precipitation of more than 400 mm showed an increase of precipitation in the semi-arid regions. In the past two whole cycles of the AMO, during the positive phase, less precipitation was distributed in the semi-arid regions of North America, more precipitation in the semi-arid regions of North Africa, Iberian Peninsula, Asia Minor Peninsula, and India, while opposite change pattern was observed in the negative phase. Such precipitation patterns which depend on AMO are associated with the North Atlantic SST anomalies. In the positive phase of AMO, the elevated SST weakened the summer sea-level pressure over the Atlantic. Then, three cyclonic circulation anomalies appear over North Atlantic, North America, and eastern Pacific. The cyclonic circulation anomalies intersected over the semi-arid regions of North America and caused anomalous low-level divergence and the North Atlantic cyclonic circulation enhanced the African monsoon, even affecting the precipitation in the semi-arid regions around the Atlantic. In the negative phase, a roughly opposite flow field occurred. Besides, according to the prediction of the E3SM 1-1 model, the negative AMO will appear in the coming decade, the same AMO which contributed to the increased semi-arid precipitation over southern part of North America and the decreased semi-arid precipitation over North Africa.
英文关键词	Precipitation Semi-arid regions Atlantic Multidecadal Oscillation Dynamic mechanism Decadal variability
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000691479200004
WOS关键词	PACIFIC DECADAL OSCILLATION ; OCEAN INFLUENCE ; CLIMATE-CHANGE ; RAINFALL ; ENSO ; VARIABILITY ; DROUGHT ; IMPACTS ; ARIDITY ; DRIVEN
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362668
作者单位	[Zhu, Kaiwei; Guan, Xiaodan; Huang, Jianping; Wang, Jiamin; Guo, Shuyang; Cao, Chenyu] Lanzhou Univ, Minist Educ, Coll Atmospher Sci, Key Lab Semi Arid Climate Change, Lanzhou, Peoples R China; [Guan, Xiaodan; Huang, Jianping] Collaborat Innovat Ctr Western Ecol Safety, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Kaiwei,Guan, Xiaodan,Huang, Jianping,et al. Precipitation over semi-arid regions of North Hemisphere affected by Atlantic Multidecadal Oscillation[J]. 兰州大学,2021,262.
APA	Zhu, Kaiwei,Guan, Xiaodan,Huang, Jianping,Wang, Jiamin,Guo, Shuyang,&Cao, Chenyu.(2021).Precipitation over semi-arid regions of North Hemisphere affected by Atlantic Multidecadal Oscillation.ATMOSPHERIC RESEARCH,262.
MLA	Zhu, Kaiwei,et al."Precipitation over semi-arid regions of North Hemisphere affected by Atlantic Multidecadal Oscillation".ATMOSPHERIC RESEARCH 262(2021).