Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-017-4007-0 |
Distinctive role of ocean advection anomalies in the development of the extreme 2015-16 El Nio | |
Abellan, Esteban1,2; McGregor, Shayne3; England, Matthew H.1,2; Santoso, Agus1,2 | |
2018-09-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 51页码:2191-2208 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | The recent 2015-16 El Nio was of comparable magnitude to the two previous record-breaking events in 1997-98 and 1982-83. To better understand how this event became an extreme event, we examine the underlying processes leading up to the peak of the event in comparison to those occurring in the 1997-98 and 1982-83 events. Differences in zonal wind stress anomalies are found to be an important factor. In particular, the persistent location of the zonal wind stress anomalies north of the equator during the two years prior to the 2015-16 peak contrasts the more symmetric pattern and shorter duration observed during the other two events. By using linear equatorially trapped wave theory, we determine the effect of these off-equatorial westerly winds on the amplitude of the forced oceanic Rossby and Kelvin wave response. We find a stronger upwelling projection onto the asymmetric Rossby wave during the 2-year period prior to the peak of the most recent event compared to the two previous events, which might explain the long-lasting onset. Here we also examine the ocean advective heat fluxes in the surface mixed layer throughout the event development phase. We demonstrate that, although zonal advection becomes the main contributor to the heat budget across the three events, meridional and vertical advective fluxes are significantly larger in the most recent event compared to those in 1997-98 and 1982-83. We further highlight the key role of advective processes during 2014 in enhancing the sea surface temperature anomalies, which led to the big El Nio in the following year. |
英文关键词 | Extreme El Nino Westerly wind anomalies Kelvin and Rossby wave projections Ocean currents Meridional asymmetry |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442433200033 |
WOS关键词 | GENERAL-CIRCULATION MODEL ; SEA-SURFACE TEMPERATURE ; LAYER HEAT-BALANCE ; LA-NINA EVENTS ; EQUATORIAL PACIFIC-OCEAN ; DATA ASSIMILATION SYSTEM ; WESTERLY WIND EVENTS ; MIXED-LAYER ; INTERANNUAL VARIABILITY ; SOUTHERN-OSCILLATION |
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/36031 |
专题 | 气候变化 |
作者单位 | 1.Univ New South Wales, ARC Ctr Excellence Climate Syst Sci, Sydney, NSW, Australia; 2.Univ New South Wales, Climate Change Res Ctr, Sydney, NSW, Australia; 3.Monash Univ, Sch Earth Atmosphere & Environm, Clayton, Vic, Australia |
推荐引用方式 GB/T 7714 | Abellan, Esteban,McGregor, Shayne,England, Matthew H.,et al. Distinctive role of ocean advection anomalies in the development of the extreme 2015-16 El Nio[J]. CLIMATE DYNAMICS,2018,51:2191-2208. |
APA | Abellan, Esteban,McGregor, Shayne,England, Matthew H.,&Santoso, Agus.(2018).Distinctive role of ocean advection anomalies in the development of the extreme 2015-16 El Nio.CLIMATE DYNAMICS,51,2191-2208. |
MLA | Abellan, Esteban,et al."Distinctive role of ocean advection anomalies in the development of the extreme 2015-16 El Nio".CLIMATE DYNAMICS 51(2018):2191-2208. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论