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DOI | 10.1007/s00382-017-3852-1 |
Why 1986 El Nino and 2005 La Nina evolved different from a typical El Nino and La Nina | |
Chen, Mingcheng1,2,3; Li, Tim1,2,3 | |
2018-12-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 51页码:4309-4327 |
文章类型 | Article;Proceedings Paper |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | 1986 El Nino (EN) and 2005 La Nina (LN) experienced distinctive evolution features compared to the typical EN and LN events. The 1986 EN persisted for more than 2years, whereas the 2005 LN transitioned into a warm episode in the following winter. The physical mechanisms that caused the distinctive evolution features are investigated through an oceanic mixed-layer heat budget (MLHB) analysis. For both cases, major differences with typical EN and LN lie in wind induced anomalous zonal advection and thermocline feedback terms. An anomalous cyclone appeared over the western North Pacific (WNPC) in late 1986, in contract to an anomalous anticyclone (WNPAC) during the mature winter of the typical EN. The eastward propagation of anomalous convective heating from tropical Indian Ocean in late 1986 holds a key for generating the anomalous WNPC in the mature winter of 1986/87 EN. The equatorial westerly anomaly south of the WNPC triggered downwelling Kelvin waves, prolonging the positive SSTA throughout 1987. The negative SSTA center of the 2005 LN shifted eastward by at least 20 degrees in longitude compared to the typical LN. As a result, an anomalous WNPC, with pronounced westerly anomalies at the equator, developed in the 2005 LN mature phase. This led to a rapid decay of the 2005 LN, and by the following boreal summer a positive SSTA formed. The season-dependent air-sea feedback further strengthens the warming in northern fall, leading to a transition from LN to EN in the succeed winter. |
英文关键词 | ENSO Evolution asymmetry Western-North Pacific circulation Interannual variability |
领域 | 气候变化 |
收录类别 | SCI-E ; ISTP |
WOS记录号 | WOS:000451725600023 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; INDIAN-OCEAN DIPOLE ; INTERANNUAL VARIABILITY ; THERMODYNAMIC PROCESSES ; SOUTHERN-OSCILLATION ; ENSO ; PACIFIC ; ASYMMETRY ; REANALYSIS ; ANOMALIES |
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/36079 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, CIC FEMD, Minist Educ KLME, Key Lab Meteorol Disaster,Joint Int Res Lab Clima, Nanjing, Jiangsu, Peoples R China; 2.Univ Hawaii Manoa, IPRC AORC, Honolulu, HI 96822 USA; 3.Univ Hawaii Manoa, Dept Atmospher Sci, Honolulu, HI 96822 USA |
推荐引用方式 GB/T 7714 | Chen, Mingcheng,Li, Tim. Why 1986 El Nino and 2005 La Nina evolved different from a typical El Nino and La Nina[J]. CLIMATE DYNAMICS,2018,51:4309-4327. |
APA | Chen, Mingcheng,&Li, Tim.(2018).Why 1986 El Nino and 2005 La Nina evolved different from a typical El Nino and La Nina.CLIMATE DYNAMICS,51,4309-4327. |
MLA | Chen, Mingcheng,et al."Why 1986 El Nino and 2005 La Nina evolved different from a typical El Nino and La Nina".CLIMATE DYNAMICS 51(2018):4309-4327. |
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