The response of tropical tropospheric ozone to ENSO
The response of tropical tropospheric ozone to ENSO
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DOI：
10.1029/2011gl047865
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发表时间：
2011-07-13
影响因子：
5.2
通讯作者：
Nielsen, J. E.
中科院分区：
文献类型：
--
作者：
Oman, L. D.;Ziemke, J. R.;Nielsen, J. E.
我们成功地在戈达德地球观测系统 (GEOS) 化学气候模型 (CCM) 中重现了臭氧 ENSO 指数 (OEI)，该模型是由 25 年期间观测到的海面温度推动的。臭氧对 ENSO 的垂直响应与沃克环流的变化一致。我们使用线性回归分析得出模拟臭氧对 ENSO 变化的敏感性。西太平洋和印度洋地区从地表到对流层上层都表现出类似的正臭氧敏感性，以响应尼诺 3.4 指数的正异常。东太平洋和中太平洋地区表现出负敏感性，其中对流层上层敏感性最大。这种垂直响应与每个区域 SHADOZ 臭氧探空仪得出的垂直响应非常吻合。 OEI 揭示了对流层臭氧对环流变化的响应，几乎与排放变化无关，因此它在化学气候模型评估中具有潜在用途。引用：Oman, L. D.、J. R. Ziemke、A. R. Douglass、D. W. Waugh、C. Lang、J. M. Rodriguez 和 J. E. Nielsen (2011)，热带对流层臭氧对 ENSO 的响应，地球物理学。资源。快报，38，L13706，doi：10.1029/2011GL047865。
We have successfully reproduced the Ozone ENSO Index (OEI) in the Goddard Earth Observing System (GEOS) chemistry-climate model (CCM) forced by observed sea surface temperatures over a 25-year period. The vertical ozone response to ENSO is consistent with changes in the Walker circulation. We derive the sensitivity of simulated ozone to ENSO variations using linear regression analysis. The western Pacific and Indian Ocean region shows similar positive ozone sensitivities from the surface to the upper troposphere, in response to positive anomalies in the Nino 3.4 Index. The eastern and central Pacific region shows negative sensitivities with the largest sensitivity in the upper troposphere. This vertical response compares well with that derived from SHADOZ ozonesondes in each region. The OEI reveals a response of tropospheric ozone to circulation change that is nearly independent of changes in emissions and thus it is potentially useful in chemistry-climate model evaluation. Citation: Oman, L. D., J. R. Ziemke, A. R. Douglass, D. W. Waugh, C. Lang, J. M. Rodriguez, and J. E. Nielsen (2011), The response of tropical tropospheric ozone to ENSO, Geophys. Res. Lett., 38, L13706, doi:10.1029/2011GL047865.