Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-019-04851-9 |
Is the boreal spring tropical Atlantic variability a precursor of the Equatorial Mode? | |
Martin-Rey, Marta1,2,3; Lazar, Alban1 | |
2019-08-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:2339-2353 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Spain |
英文摘要 | The Equatorial Mode (EM) governs the tropical Atlantic inter-annual variability during boreal summer. It has profound impacts on the climate of adjacent and remote areas. However, predicting the EM is one of the most challenging and intriguing issues for the scientific community. Recent studies have suggested a possible connection between the boreal spring Meridional Mode (MM) and the EM through ocean wave propagation. Here, we use a set of sensitivity experiments with a medium-resolution ocean model to determine the precursor role of a MM to create equatorial SST variability. Our results demonstrate that boreal summer equatorial SSTs following a MM, are subject to two counteracting effects: the local wind forcing and remotely-excited oceanic waves. For a positive MM, the anomalous easterly winds blowing along the equator, shallow the thermocline, cooling the sea surface via vertical diffusion and meridional advection. Anomalous wind curl excites a downwelling Rossby wave north of equator, which is reflected at the western boundary becoming an equatorial Kelvin wave (KW). This downwelling KW propagates eastward, deepening the thermocline and activating the thermocline feedbacks responsible for the equatorial warming. Moreover, the local wind forcing and RW-reflected mechanism have a significant and comparable impact on the equatorial SST variability. Changes in the intensity and persistence of these distinct forcings will determine the equatorial SST response during boreal summer. Our results give a step forward to the improvement of the EM predictability. |
英文关键词 | Tropical Atlantic Meridional Mode Equatorial Mode Ocean waves SST variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000475558800064 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; INTERANNUAL VARIABILITY ; MERIDIONAL MODES ; PACIFIC ; OCEAN ; AFRICAN ; ENSO |
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/185458 |
专题 | 气候变化 |
作者单位 | 1.Univ Sorbonnes, UPMC, LOCEAN, Paris, France; 2.CERFACS, CNRS, UMR5318, CECI, Toulouse, France; 3.CSIC, ICM, Dept Oceanog Fis & Tecnol, Passeig Maritim Barceloneta 37-49, E-08003 Barcelona, Spain |
推荐引用方式 GB/T 7714 | Martin-Rey, Marta,Lazar, Alban. Is the boreal spring tropical Atlantic variability a precursor of the Equatorial Mode?[J]. CLIMATE DYNAMICS,2019,53:2339-2353. |
APA | Martin-Rey, Marta,&Lazar, Alban.(2019).Is the boreal spring tropical Atlantic variability a precursor of the Equatorial Mode?.CLIMATE DYNAMICS,53,2339-2353. |
MLA | Martin-Rey, Marta,et al."Is the boreal spring tropical Atlantic variability a precursor of the Equatorial Mode?".CLIMATE DYNAMICS 53(2019):2339-2353. |
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