DOI: 10.1175/JCLI-D-17-0657.1
Scopus记录号: 2-s2.0-85049748417
论文题名: Understanding the interdecadal variability of East Asian summer monsoon precipitation: Joint influence of three oceanic signals
作者: Zhang Z. ; Sun X. ; Yang X.-Q.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 14 起始页码: 5485
结束页码: 5506
语种: 英语
英文关键词: Interdecadal variability
; Monsoons
; Pacific decadal oscillation
; Precipitation
; Teleconnections
Scopus关键词: Atmospheric thermodynamics
; Climate change
; Fighter aircraft
; Precipitation (chemical)
; Waveguides
; Atlantic multidecadal oscillations
; East Asian summer monsoon
; Indian summer monsoon
; Inter-decadal variability
; Monsoons
; Pacific decadal oscillation
; Precipitation anomalies
; Teleconnections
; Oceanography
; decadal variation
; monsoon
; Pacific Decadal Oscillation
; precipitation (climatology)
; sea surface temperature
; summer
; teleconnection
; temperature anomaly
; Atlantic Ocean
; Atlantic Ocean (North)
; Eurasia
; Far East
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: East Asian summer monsoon precipitation (EASMP) features complicated interdecadal variability with multiple time periods and spatial patterns. Using century-long datasets of HadISST, CRU precipitation, and the ECMWF twentieth-century reanalysis (ERA-20C), this study examines the joint influence of three oceanic interdecadal signals [i.e., Pacific decadal oscillation (PDO), Atlantic multidecadal oscillation (AMO), and Indian Ocean Basin mode (IOBM)] on the EASMP, which, however, is found not to be simply a linear combination of their individual effects. When PDO and AMO are out of phase, the same-sign SST anomalies occur in the North Pacific and North Atlantic, and a zonally orientated teleconnection wave train appears across the Eurasian mid-to-high latitudes, propagating from the North Atlantic to northern East Asia along the Asian westerly jet waveguide. Correspondingly, the interdecadal precipitation anomalies are characterized by a meridional tripole mode over eastern China. When PDO and AMO are in phase, with opposite sign SST anomalies in the North Pacific and North Atlantic, the sandwich pattern of anomalous stationary Rossby wavenumber tends to reduce the effect of the waveguide in the eastern Mediterranean region, and the teleconnection wave train from the North Atlantic travels only to western central Asia along a great circle route, causing Indian summer monsoon precipitation (ISMP) anomalies. The ISMP anomalies, in turn, interact with the teleconnection wave train induced by the PDO and AMO, leading to a meridional dipole mode of interdecadal precipitation anomalies over eastern China. Through the impact on the ISMP, the IOBM exerts significantly linear modulation on the combined impacts of PDO and AMO, especially over northern East Asia. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111496
Appears in Collections: 气候减缓与适应
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作者单位: CMA-NJU Joint Laboratory for Climate Prediction Studies, Nanjing University, Nanjing, China; Jiangsu Collaborative Innovation Center of Climate Change, School of Atmospheric Sciences, Nanjing University, Nanjing, China
Recommended Citation:
Zhang Z.,Sun X.,Yang X.-Q.. Understanding the interdecadal variability of East Asian summer monsoon precipitation: Joint influence of three oceanic signals[J]. Journal of Climate,2018-01-01,31(14)