The role of atmosphere feedbacks during ENSO in the CMIP3 models

被引：107
|
作者：
Lloyd, James [1 ]
Guilyardi, Eric [2 ,3 ]
Weller, Hilary
Slingo, Julia [4 ]
机构：
[1] Univ Reading, Dept Meteorol, NCAS Climate, Reading RG6 6BB, Berks, England
[2] Univ Reading, Walker Inst, NCAS Climate, Reading RG6 6BB, Berks, England
[3] LOCEAN IPSL CNRS UPMC IRD, Paris, France
[4] Met Off, Exeter, Devon, England
来源：
ATMOSPHERIC SCIENCE LETTERS | 2009年 / 10卷 / 03期
基金：
英国自然环境研究理事会;
关键词：
ENSO; Atmosphere feedbacks; CMIP3; GCMs; SEA-SURFACE TEMPERATURE; EQUATORIAL PACIFIC; EL-NINO; CLIMATE; ITCZ; GCMS;
D O I：
10.1002/asl.227
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Several studies using ocean-atmosphere GCMs suggest that the atmospheric component plays a dominant role in the modelled ENSO. To help elucidate these findings, the two main atmosphere feedbacks relevant to ENSO, the Bjerknes positive feedback (mu) and the heat flux negative feedback (alpha), are analysed here in 12 coupled GCMs. We find that the models generally underestimate both feedbacks, leading to an error compensation. The strength of alpha is inversely related to the ENSO amplitude in the models and the latent heat and shortwave flux components of this feedback dominate. Furthermore, the shortwave component could help explain the model diversity in both overall alpha and ENSO amplitude. Copyright (C) 2009 Royal Meteorological Society and Crown Copyright
引用
收藏
页码：170 / 176
页数：7
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