DOI: 10.1007/s00382-014-2064-1
Scopus记录号: 2-s2.0-84906074819
论文题名: ENSO phase-locking to the boreal winter in CMIP3 and CMIP5 models
作者: Ham Y.-G. ; Kug J.-S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-01-02 起始页码: 305
结束页码: 318
语种: 英语
英文关键词: CMIP models
; ENSO
; Phase Locking
英文摘要: In this study, the El Nino-Southern Oscillation (ENSO) phase-locking to the boreal winter in CMIP3 and CMIP5 models is examined. It is found that the models that are poor at simulating the winter ENSO peak tend to simulate colder seasonal-mean sea-surface temperature (SST) during the boreal summer and associated shallower thermocline depth over the eastern Pacific. These models tend to amplify zonal advection and thermocline depth feedback during boreal summer. In addition, the colder eastern Pacific SST in the model can reduce the summertime mean local convective activity, which tends to weaken the atmospheric response to the ENSO SST forcing. It is also revealed that these models have more serious climatological biases over the tropical Pacific, implying that a realistic simulation of the climatological fields may help to simulate winter ENSO peak better. The models that are poor at simulating ENSO peak in winter also show excessive anomalous SST warming over the western Pacific during boreal winter of the El Nino events, which leads to strong local convective anomalies. This prevents the southward shift of El Nino-related westerly during boreal winter season. Therefore, equatorial westerly is prevailed over the western Pacific to further development of ENSO-related SST during boreal winter. This bias in the SST anomaly is partly due to the climatological dry biases over the central Pacific, which confines ENSO-related precipitation and westerly responses over the western Pacific. © 2014 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54513
Appears in Collections: 过去全球变化的重建
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作者单位: Chonnam National University, Kwangju, South Korea; School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, South Korea
Recommended Citation:
Ham Y.-G.,Kug J.-S.. ENSO phase-locking to the boreal winter in CMIP3 and CMIP5 models[J]. Climate Dynamics,2014-01-01,43(2017-01-02)