Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL090079 |
Thermocline warming induced extreme Indian Ocean Dipole in 2019 | |
Yan Du; Yuhong Zhang; Lian‐; Yi Zhang; Tomoki Tozuka; Benjamin Ng; Wenju Cai | |
2020-09-14 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | The 2019 positive Indian Ocean Dipole (IOD) was the strongest event since the 1960s which developed independently without coinciding El Niño. The dynamics is not fully understood. Here we show that in March‐May, westward propagating oceanic Rossby waves, a remnant consequence of the weak 2018 Pacific warm condition, led to anomalous sea surface temperature warming in the southwest tropical Indian Ocean (TIO), inducing deep convection and anomalous easterly winds along the equator, which triggered the initial cooling in the east. In June‐August, the easterly wind anomalies continued to evolve through ocean‐atmosphere coupling involving Bjerknes feedback and equatorial nonlinear ocean advection, until its maturity in September‐November. This study clarifies the contribution of oceanic Rossby waves in the south TIO in different dynamic settings and reveals a new triggering mechanism for extreme IOD events that will help to understand IOD diversity. |
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/295319 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Yan Du,Yuhong Zhang,Lian‐,et al. Thermocline warming induced extreme Indian Ocean Dipole in 2019[J]. Geophysical Research Letters,2020. |
APA | Yan Du.,Yuhong Zhang.,Lian‐.,Yi Zhang.,Tomoki Tozuka.,...&Wenju Cai.(2020).Thermocline warming induced extreme Indian Ocean Dipole in 2019.Geophysical Research Letters. |
MLA | Yan Du,et al."Thermocline warming induced extreme Indian Ocean Dipole in 2019".Geophysical Research Letters (2020). |
条目包含的文件 | 条目无相关文件。 |
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