DOI: 10.1175/JCLI-D-13-00015.1
Scopus记录号: 2-s2.0-84896945899
论文题名: How does the east asian summer monsoon behave in the decaying phase of el niño during different PDO phases
作者: Feng J. ; Wang L. ; Chen W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 7 起始页码: 2682
结束页码: 2698
语种: 英语
Scopus关键词: Rain
; Storms
; Atmospheric anomaly
; East Asian summer monsoon
; North indian oceans
; Pacific decadal oscillation
; Positive rainfall anomalies
; Rainfall patterns
; Spatial domains
; Western Pacific
; Decay (organic)
; anticyclone
; cyclone
; El Nino
; monsoon
; Pacific Decadal Oscillation
; rainfall
; seasonal variation
; summer
; warming
; China
; Japan
; Philippines
英文摘要: Modulation of the Pacific decadal oscillation (PDO) on the behavior of the East Asian summer monsoon (EASM) in El Niño decaying years has been studied. When El Niño is in phase with the PDO (El Niño/high PDO), the low-level atmospheric anomalies are characterized by an anticyclone around the Philippines and a cyclone around Japan, inducing an anomalous tripolar rainfall pattern in China. In this case, the western Pacific subtropical high (WPSH) experiences a one-time slightly northward shift in July and then stays stationary from July to August. The corresponding anomalous tripolar rainfall pattern has weak subseasonal variations. When El Niño is out of phase with the PDO (El Niño/low PDO), however, the anomalous Philippines anticyclone has a much larger spatial domain, thereby causing an anomalous dipole rainfall pattern. Accordingly, WPSH experiences clearly two northward shifts. Therefore, the related dipole rainfall pattern has large subseasonal variations. One pronounced feature is that the positive rainfall anomalies shift northward from southern China in June to central China in July and finally to northern China in August. The different El Niño-EASM relationships are caused by the influences of PDO on the decaying speed of El Niño. During the high PDO phase, El Niño decays slowly and has a strong anchor in the north Indian Ocean warming, which is responsible for the anomalous EASM. Comparatively, during the low PDO phase, El Niño decays rapidly and La Niña develops in summer, which induces different EASM anomalies from that during the high PDO phase. Additionally, PDO changes El Niño behaviors mainly via modifying the background tropical winds.© 2014 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51237
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Feng J.,Wang L.,Chen W.. How does the east asian summer monsoon behave in the decaying phase of el niño during different PDO phases[J]. Journal of Climate,2014-01-01,27(7)