DOI: 10.1002/2014GL062125
论文题名: Asymmetry of the Bjerknes positive feedback between the two types of El Niño
作者: Zheng F. ; Fang X.-H. ; Yu J.-Y. ; Zhu J.
刊名: Geophysical Research Letters
ISSN: 0094-9632
EISSN: 1944-9363
出版年: 2014
卷: 41, 期: 21 起始页码: 7651
结束页码: 7657
语种: 英语
英文关键词: asymmetry
; Bjerknes feedback
; CP El Niño
; EP El Niño
Scopus关键词: Atmospheric temperature
; Nickel
; Sea level
; Surface waters
; asymmetry
; Bjerknes feedback
; Diabatic heating
; Eastern pacific
; Sea level pressure
; Sea surface temperature anomalies
; Strength asymmetry
; Zonal wind
; Feedback
; amplitude
; asymmetry
; El Nino
; sea surface temperature
; thermodynamic property
; wind field
; zonal wind
英文摘要: Corresponding to the pronounced amplitude asymmetry for the central Pacific (CP) and eastern Pacific (EP) types of El Niño, an asymmetry in the strength of the Bjerknes positive feedback is found between these two types of El Niño, which is manifested as a weaker relationship between the zonal wind anomaly and the zonal gradient of sea surface temperature (SST) anomaly in the CP El Niño. The strength asymmetry mainly comes from a weaker sensitivity of the zonal gradient of sea level pressure (SLP) anomaly to that of diabatic heating anomaly during CP El Niño. This weaker sensitivity is caused by (1) a large cancelation induced by the negative SST-cloud thermodynamic feedback to the positive dynamical feedback for CP El Niño, (2) an off-equator shift of the maximum SLP anomalies during CP El Niño, and (3) a suppression of the mean low-level convergence when CP El Niño events occur more often. Key Points Asymmetry of the Bjerknes positive feedback exits between the CP and EP El NiñosThe strength of the Bjerknes positive feedback acts to induce the ENSO diversityThe asymmetry is caused by a different response of zonal SLP to diabatic heating ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84912144197&doi=10.1002%2f2014GL062125&partnerID=40&md5=f50cb548183de693545baf35209f12bb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6896
Appears in Collections: 气候减缓与适应
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作者单位: International Center for Climate and Environment Science, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Zheng F.,Fang X.-H.,Yu J.-Y.,et al. Asymmetry of the Bjerknes positive feedback between the two types of El Niño[J]. Geophysical Research Letters,2014-01-01,41(21).