A pre-monsoon signal of false alarms of Indian monsoon droughts

GOSWAMI BB. 2024. A pre-monsoon signal of false alarms of Indian monsoon droughts. Geophysical Research Letters. 51(5), e2023GL106569.

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Journal Article | Published | English

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Corresponding author has ISTA affiliation

Department
Abstract
Current knowledge suggests a drought Indian monsoon (perhaps a severe one) when the El Nino Southern Oscillation and Pacific Decadal Oscillation each exhibit positive phases (a joint positive phase). For the monsoons, which are exceptions in this regard, we found northeast India often gets excess pre-monsoon rainfall. Further investigation reveals that this excess pre-monsoon rainfall is produced by the interaction of the large-scale circulation associated with the joint phase with the mountains in northeast India. We posit that a warmer troposphere, a consequence of excess rainfall over northeast India, drives a stronger monsoon circulation and enhances monsoon rainfall over central India. Hence, we argue that pre-monsoon rainfall over northeast India can be used for seasonal monsoon rainfall prediction over central India. Most importantly, its predictive value is at its peak when the Pacific Ocean exhibits a joint positive phase and the threat of extreme drought monsoon looms over India.
Publishing Year
Date Published
2024-03-16
Journal Title
Geophysical Research Letters
Publisher
Wiley
Acknowledgement
The author gratefully acknowledges ISTA for supporting this research through funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Project CLUSTER, grant agreement No. 805041).
Volume
51
Issue
5
Article Number
e2023GL106569
ISSN
eISSN
IST-REx-ID

Cite this

GOSWAMI BB. A pre-monsoon signal of false alarms of Indian monsoon droughts. Geophysical Research Letters. 2024;51(5). doi:10.1029/2023GL106569
GOSWAMI, B. B. (2024). A pre-monsoon signal of false alarms of Indian monsoon droughts. Geophysical Research Letters. Wiley. https://doi.org/10.1029/2023GL106569
GOSWAMI, BIDYUT B. “A Pre-Monsoon Signal of False Alarms of Indian Monsoon Droughts.” Geophysical Research Letters. Wiley, 2024. https://doi.org/10.1029/2023GL106569.
B. B. GOSWAMI, “A pre-monsoon signal of false alarms of Indian monsoon droughts,” Geophysical Research Letters, vol. 51, no. 5. Wiley, 2024.
GOSWAMI BB. 2024. A pre-monsoon signal of false alarms of Indian monsoon droughts. Geophysical Research Letters. 51(5), e2023GL106569.
GOSWAMI, BIDYUT B. “A Pre-Monsoon Signal of False Alarms of Indian Monsoon Droughts.” Geophysical Research Letters, vol. 51, no. 5, e2023GL106569, Wiley, 2024, doi:10.1029/2023GL106569.
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2024-03-25
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