Northern winter stratospheric temperature and ozone responses to ENSO inferred from an ensemble of Chemistry Climate Models
Northern winter stratospheric temperature and ozone responses to ENSO inferred from an ensemble of Chemistry Climate Models
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DOI：
10.5194/acp-9-8935-2009
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发表时间：
2009-11
影响因子：
6.3
通讯作者：
C. Cagnazzo;E. Manzini;N. Calvo;A. Douglass;H. Akiyoshi;S. Bekki;M. Chipperfield;M. Dameris;M. Deushi;A. Fischer;H. Garny;A. Gettelman;M. Giorgetta;D. Plummer;E. Rozanov;T. Shepherd;K. Shibata;A. Stenke;H. Struthers;W. Tian
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文献类型：
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作者：
C. Cagnazzo;E. Manzini;N. Calvo;A. Douglass;H. Akiyoshi;S. Bekki;M. Chipperfield;M. Dameris;M. Deushi;A. Fischer;H. Garny;A. Gettelman;M. Giorgetta;D. Plummer;E. Rozanov;T. Shepherd;K. Shibata;A. Stenke;H. Struthers;W. Tian
厄尔尼诺-南方涛动（ENSO）与北极平流层之间的联系已通过观测和大气模拟得到证实。本文报道了化学气候模式（CCMs）中模拟平流层对ENSO的敏感性的系统相互比较。这项工作使用了2006年臭氧评估中包括的若干ccm的结果。在平流层下层，所有模式模拟的平均值报告，在2月至3月的强ENSO事件期间，极地涡旋变暖，与卫星观测和ERA40再分析的估计一致，但小于估计。异常变暖与70°N以北的柱状臭氧的异常动力增加有关，并伴随着热带柱状臭氧的相干减少，这与NIWA柱状臭氧数据库的推断一致，这意味着ENSO期间所有模式模拟的平均值中剩余环流增加。模式响应的传播部分是由于平流层内部的大变率，并且表明它在很大程度上取决于模式中对流层ENSO遥相关的表示。
The connection between the El Nino Southern Oscillation (ENSO) and the Northern polar stratosphere has been established from observations and atmospheric modeling. Here a systematic inter-comparison of the sensitivity of the modeled stratosphere to ENSO in Chemistry Climate Models (CCMs) is reported. This work uses results from a number of the CCMs included in the 2006 ozone assessment. In the lower stratosphere, the mean of all model simulations reports a warming of the polar vortex during strong ENSO events in February-March, consistent with but smaller than the estimate from satellite observations and ERA40 reanalysis. The anomalous warming is associated with an anomalous dynamical increase of column ozone north of 70 degrees N that is accompanied by coherent column ozone decrease in the Tropics, in agreement with that deduced from the NIWA column ozone database, implying an increased residual circulation in the mean of all model simulations during ENSO. The spread in the model responses is partly due to the large internal stratospheric variability and it is shown that it crucially depends on the representation of the tropospheric ENSO teleconnection in the models.