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DOI | 10.1029/2021GL095124 |
Large South Equatorial Current meander in the southeastern tropical Indian Ocean captured by surface drifters deployed in 2019 | |
Wei Wu; Yan Du; Yu-Kun Qian; Ju Chen; Xingwei Jiang | |
2022-02-11 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2022 |
英文摘要 | To investigate the South Equatorial Current (SEC) in the Indian Ocean, 18 drifters were deployed off Sumatra-Java during boreal spring 2019. These drifter observations revealed a large SEC meander that swung southward about 1,100 kilometers during 40 days along ∼100°E. The southward motion occurred on the eastern edge of the Seychelles-Chagos thermocline ridge, accompanied by an anticyclonic eddy/Rossby wave from the east, indicated by the geostrophic velocity induced by the zonal pressure gradient. Meanwhile, the ageostrophic velocity induced by the southeasterly wind also contributes to this southward motion. This is verified by a Lagrangian Trajectory Model in which drifter trajectories are well reproduced using Chinese-French Oceanic SATellite (CFOSAT) winds products. Further analysis of the historical drifters with similar trajectories reveals that the geostrophic and ageostrophic currents jointly drive drifters to move southward. Ageostrophic component could contribute up to 45% of the southward movement of the SEC meander. |
领域 | 气候变化 |
URL | 查看原文 |
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/346730 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Wei Wu,Yan Du,Yu-Kun Qian,et al. Large South Equatorial Current meander in the southeastern tropical Indian Ocean captured by surface drifters deployed in 2019[J]. Geophysical Research Letters,2022. |
APA | Wei Wu,Yan Du,Yu-Kun Qian,Ju Chen,&Xingwei Jiang.(2022).Large South Equatorial Current meander in the southeastern tropical Indian Ocean captured by surface drifters deployed in 2019.Geophysical Research Letters. |
MLA | Wei Wu,et al."Large South Equatorial Current meander in the southeastern tropical Indian Ocean captured by surface drifters deployed in 2019".Geophysical Research Letters (2022). |
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