Advanced search

Intraseasonal synchronization of extreme rainfalls between North India and the Sahel

Download
[thumbnail of Open Access]
Preview
Text (Open Access) - Published Version
· Available under License Creative Commons Attribution.
· Please see our End User Agreement before downloading. | Preview
Available under license: Creative Commons Attribution
[thumbnail of summer_monsoon_synchronization (1).pdf]
Text - Accepted Version
· Restricted to Repository staff only
Restricted to Repository staff only
Advice

Please see our End User Agreement.

It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

Tools
Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email
Lists

Strnad, F. M., Hunt, K. M. R. orcid id iconORCID: https://orcid.org/0000-0003-1480-3755, Boers, N. and Goswami, B. (2025) Intraseasonal synchronization of extreme rainfalls between North India and the Sahel. Quarterly Journal of the Royal Meteorological Society. e4946. ISSN 1477-870X doi: 10.1002/qj.4946

Abstract/Summary

The Indian Summer Monsoon (ISM) and the West African Monsoon (WAM) are dominant drivers of boreal summer precipitation variability in tropical and subtropical regions. Although the regional precipitation dynamics in these two regions have been extensively studied, the intraseasonal interactions between the ISM and WAM remain poorly understood. Here, we employ a climate network approach based on extreme rainfall events to uncover synchronously occurring extreme rainfall patterns across the two monsoon systems. We reveal strong synchronization of extreme rainfall events during the peak monsoon period in July and August, linking heavy rainfall over North India to that over the Sahel with a lag of around 12 days. We find that La Niña-like conditions in combination with the Boreal Summer Intraseasonal Oscillation and an enhanced Tropical Easterly Jet (TEJ) foster the synchronization between the ISM and the WAM. The northward propagating BSISO triggers African Easterly Wave activity, bounded between a reduced African Easterly Jet and the TEJ. These induce westward traveling anomalous deep convection over the Sahel which causes extreme rainfall events to occur.

Altmetric Badge

Item Type Article
URI https://reading-clone.eprints-hosting.org/id/eprint/120354
Identification Number/DOI 10.1002/qj.4946
Refereed Yes
Divisions Science > School of Mathematical, Physical and Computational Sciences > NCAS
Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
Uncontrolled Keywords India, monsoon, extreme rainfall, Sahel, synchronization, machine learning
Publisher Royal Meteorological Society
Download/View statistics View download statistics for this item
Download Statistics

Downloads

Downloads per month over past year

Deposit Details

University Staff: Request a correction | Centaur Editors: Update this record

Search Google Scholar