Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0842.1 |
The Nature of the Stochastic Wind Forcing of ENSO | |
Capotondi, Antonietta1,2; Sardeshmukh, Prashant D.1,2; Ricciardulli, Lucrezia3 | |
2018-10-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:19页码:8081-8099 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | El Nino-Southern Oscillation (ENSO) is commonly viewed as a low-frequency tropical mode of coupled atmosphere-ocean variability energized by stochastic wind forcing. Despite many studies, however, the nature of this broadband stochastic forcing and the relative roles of its high- and low-frequency components in ENSO development remain unclear. In one view, the high-frequency forcing associated with the subseasonal Madden-Julian oscillation (MJO) and westerly wind events (WWEs) excites oceanic Kelvin waves leading to ENSO. An alternative view emphasizes the role of the low-frequency stochastic wind components in directly forcing the low-frequency ENSO modes. These apparently distinct roles of the wind forcing are clarified here using a recently released high-resolution wind dataset for 1990-2015. A spectral analysis shows that although the high-frequency winds do excite high-frequency Kelvin waves, they are much weaker than their interannual counterparts and are a minor contributor to ENSO development. The analysis also suggests that WWEs should be viewed more as short-correlation events with a flat spectrum at low frequencies that can efficiently excite ENSO modes than as strictly high-frequency events that would be highly inefficient in this regard. Interestingly, the low-frequency power of the rapid wind forcing is found to be higher during El Nino than La Nina events, suggesting a role also for state-dependent (i.e., multiplicative) noise forcing in ENSO dynamics. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442845400002 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; MADDEN-JULIAN OSCILLATION ; TONGUE EL-NINO ; EQUATORIAL PACIFIC ; TROPICAL PACIFIC ; WARM POOL ; THERMOCLINE VARIABILITY ; OPTIMAL-GROWTH ; EVENTS ; BURSTS |
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/20241 |
专题 | 气候变化 |
作者单位 | 1.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 2.NOAA, Phys Sci Div, Earth Syst Res Lab, Boulder, CO 80303 USA; 3.Remote Sensing Syst, Santa Rosa, CA USA |
推荐引用方式 GB/T 7714 | Capotondi, Antonietta,Sardeshmukh, Prashant D.,Ricciardulli, Lucrezia. The Nature of the Stochastic Wind Forcing of ENSO[J]. JOURNAL OF CLIMATE,2018,31(19):8081-8099. |
APA | Capotondi, Antonietta,Sardeshmukh, Prashant D.,&Ricciardulli, Lucrezia.(2018).The Nature of the Stochastic Wind Forcing of ENSO.JOURNAL OF CLIMATE,31(19),8081-8099. |
MLA | Capotondi, Antonietta,et al."The Nature of the Stochastic Wind Forcing of ENSO".JOURNAL OF CLIMATE 31.19(2018):8081-8099. |
条目包含的文件 | 条目无相关文件。 |
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