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| DOI | 10.1029/2020JD034161 |
| The Southern Annular Mode in 6th Coupled Model Intercomparison Project Models | |
| Morgenstern O. | |
| 发表日期 | 2021 |
| ISSN | 2169897X |
| 卷号 | 126期号:5 |
| 英文摘要 | I analyze trends in the Southern Annular Mode (SAM) in CMIP6 simulations. For the period 1957–2014, simulated linear trends are generally consistent with two observational references but seasonally in disagreement with two other representations of the SAM. Using a regression analysis applied to model simulations with interactive ozone chemistry, a strengthening of the SAM in summer is attributed nearly completely to ozone depletion because a further strengthening influence due to long-lived greenhouse gases is almost fully counterbalanced by a weakening influence due to stratospheric ozone increases associated with these greenhouse gas increases. Ignoring such ozone feedbacks would yield comparable contributions from these two influences, an incorrect result. In winter, trends are smaller but an influence of greenhouse gas-mediated ozone feedbacks is also identified. The regression analysis furthermore yields significant differences in the attribution of SAM changes to the two influences between models with and without interactive ozone chemistry, with ozone depletion and GHG increases playing seasonally a stronger and weaker, respectively, role in the chemistry models versus the no-chemistry ones. © 2021. American Geophysical Union. All Rights Reserved. |
| 英文关键词 | attribution; CMIP6; greenhouse gases; ozone; SAM; Southern Annular Mode |
| 语种 | 英语 |
| 来源期刊 | Journal of Geophysical Research: Atmospheres
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/185432 |
| 作者单位 | National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand |
| 推荐引用方式 GB/T 7714 | Morgenstern O.. The Southern Annular Mode in 6th Coupled Model Intercomparison Project Models[J],2021,126(5). |
| APA | Morgenstern O..(2021).The Southern Annular Mode in 6th Coupled Model Intercomparison Project Models.Journal of Geophysical Research: Atmospheres,126(5). |
| MLA | Morgenstern O.."The Southern Annular Mode in 6th Coupled Model Intercomparison Project Models".Journal of Geophysical Research: Atmospheres 126.5(2021). |
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