Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091958 |
What Determines the Lagged ENSO Response in the South‐West Indian Ocean? | |
M. D. Eabry; A. S. Taschetto; A. M. Maharaj; A. Sen Gupta | |
2021-02-19 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Oceanic Rossby waves can propagate climate signals over considerable distances over long timescales. Using a long simulation from a coupled climate model, we examine oceanic and mixed atmosphere‐ocean teleconnections to the south‐western Indian Ocean (SWIO) associated with Rossby waves excited by the El Niño‐Southern Oscillation (ENSO). Reconstruction of propagating ENSO‐induced sea‐level anomalies from the simulation using an optimised linear wave model with dissipation highlights the prominent role of baroclinic, rather than barotropic, Rossby waves in modulating sea‐surface heights. Between 9.5°S and 18.5°S, El Niño‐associated anomalous anticyclonic wind‐stress fields initiate downwelling Rossby waves, potentially influencing SWIO regional climate around 1‐4 seasons after El Niño peak, while also destructively interfering with upwelling waves triggered on the eastern boundary by oceanic teleconnections. Further south, weaker ENSO winds, dissipation, non‐linear processes and interference from higher‐mode Rossby waves limit ENSO influences in the SWIO. In the model, ENSO‐associated predictability is therefore constrained by the “atmospheric” rather than “oceanic” bridge. |
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/315617 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | M. D. Eabry,A. S. Taschetto,A. M. Maharaj,等. What Determines the Lagged ENSO Response in the South‐West Indian Ocean?[J]. Geophysical Research Letters,2021. |
APA | M. D. Eabry,A. S. Taschetto,A. M. Maharaj,&A. Sen Gupta.(2021).What Determines the Lagged ENSO Response in the South‐West Indian Ocean?.Geophysical Research Letters. |
MLA | M. D. Eabry,et al."What Determines the Lagged ENSO Response in the South‐West Indian Ocean?".Geophysical Research Letters (2021). |
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