The El Nino-Southern Oscillation Pattern Effect

被引：19
作者：
Ceppi, Paulo [1 ,2 ]
Fueglistaler, Stephan [3 ,4 ]
机构：
[1] Imperial Coll London, Grantham Inst, London, England
[2] Imperial Coll London, Dept Phys, London, England
[3] Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA
[4] Princeton Univ, Program Atmospher & Ocean Sci, Princeton, NJ 08544 USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2021年 / 48卷 / 21期
基金：
美国国家科学基金会; 英国自然环境研究理事会;
关键词：
climate variability; climate change; radiation budget; clouds; ENSO; climate feedbacks; SEA-SURFACE TEMPERATURE; LOW-CLOUD COVER; INTERNAL VARIABILITY; RADIATIVE FEEDBACKS; CLIMATE SENSITIVITY; DEPENDENCE; MODELS; ENSO;
D O I：
10.1029/2021GL095261
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
El Nino-Southern Oscillation (ENSO) variability is accompanied by out-of-phase anomalies in the top-of-atmosphere tropical radiation budget, with anomalous downward flux (i.e., net radiative heating) before El Nino and anomalous upward flux thereafter (and vice versa for La Nina). Here, we show that these radiative anomalies result mainly from a sea surface temperature (SST) "pattern effect," mediated by changes in tropical-mean tropospheric stability. These stability changes are caused by SST anomalies migrating from climatologically cool to warm regions over the ENSO cycle. Our results are suggestive of a two-way coupling between SST variability and radiation, where ENSO-induced radiative changes may in turn feed back onto SST during ENSO.
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页数：9
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