Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0541.1 |
Nonlinear ENSO Warming Suppression (NEWS) | |
Kohyama, Tsubasa; Hartmann, Dennis L. | |
2017-06-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | In global warming experiments, the majority of global climate models warm faster in the eastern equatorial Pacific than in the west and produce a weakening of the Walker circulation. In contrast, GFDL-ESM2M is an exception that exhibits a La Nina-like mean-state warming with a strengthening of the Walker circulation. This study explores the cause of this exceptional response and proposes a new mechanism, the nonlinear ENSO warming suppression (NEWS), where the transient heating rate difference between the atmospheric and oceanic reservoirs annihilates extreme El Ninos, causing a suppression of mean-state warming in the east. Heat budget analyses of GFDL-ESM2M robustly show that nonlinear dynamical heating, which is necessary for extremely warm El Ninos, becomes negligible under warming. An idealized nonlinear recharge oscillator model suggests that, if the temperature difference between the atmospheric and oceanic reservoirs becomes larger than some threshold value, the upwelling becomes too efficient for El Nino-Southern Oscillation (ENSO) to retain its nonlinearity. Therefore, extreme El Ninos dissipate but La Ninas remain almost unchanged, causing a La Nina-like mean-state warming. NEWS is consistent with observations and GFDL-ESM2M but not with the majority of state-of-the-art models, which lack realistic ENSO nonlinearity. NEWS and its opposite response to atmospheric cooling, the nonlinear ENSO cooling suppression (NECS), might contribute to the Pacific multidecadal natural variability and global warming hiatuses. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401007500017 |
WOS关键词 | EL-NINO ; TROPICAL PACIFIC ; CLIMATE-CHANGE ; MODEL ; VARIABILITY ; FREQUENCY ; ASYMMETRY ; HIATUS ; CMIP5 ; STATE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20652 |
专题 | 气候变化 |
作者单位 | Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Kohyama, Tsubasa,Hartmann, Dennis L.. Nonlinear ENSO Warming Suppression (NEWS)[J]. JOURNAL OF CLIMATE,2017,30(11). |
APA | Kohyama, Tsubasa,&Hartmann, Dennis L..(2017).Nonlinear ENSO Warming Suppression (NEWS).JOURNAL OF CLIMATE,30(11). |
MLA | Kohyama, Tsubasa,et al."Nonlinear ENSO Warming Suppression (NEWS)".JOURNAL OF CLIMATE 30.11(2017). |
条目包含的文件 | 条目无相关文件。 |
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