What does this research mean for the field?

A positive Atlantic Multidecadal Variability (AMV) phase increases Sahel rainfall and intensifies the West African Monsoon by enhancing surface latent heat flux, which drives anomalous southward cross-equatorial energy transport and a northward shift of the Intertropical Convergence Zone. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To determine the energetic and atmospheric mechanisms through which Atlantic Multidecadal Variability influences West African Monsoon intensity and Sahel rainfall.

September 4, 2026Weather and Climate DynamicsOpen Access

An energetic perspective on the impact of the Atlantic Multidecadal Variability on the West African Monsoon

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Authors

EMElsa Mohíno PMPaul‐Arthur Monerie JMJuliette Mignot

Discussion

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Overview

Climate modeling demonstrates that positive Atlantic Multidecadal phases increase Sahel rainfall by shifting the tropical rain belt northward, highlighting atmospheric energy transport mechanisms.

Key Points

To determine the energetic and atmospheric mechanisms through which Atlantic Multidecadal Variability influences West African Monsoon intensity and Sahel rainfall.
Conducted numerical climate experiments using coupled atmosphere-ocean models forced by an idealized Atlantic Multidecadal Variability sea surface temperature pattern.
Evaluated atmospheric energy budget adjustments, cross-equatorial energy flux, and regional vertical circulation responses over the Sahara and Sahel.
A positive phase of the Atlantic Multidecadal Variability increases atmospheric net energy via elevated surface latent heat flux, driving southward cross-equatorial energy transport and shifting the Intertropical Convergence Zone northward.
The northward shift amplifies Sahel rainfall through enhanced low-level convergence, upper-level divergence, and reduced mid-level dry-air intrusions driven by a weakened Saharan shallow meridional circulation.

Cite This Study

Mohíno et al. (2026) studied this question.

synapsesocial.com/papers/6a9a85345d9e33f25c630cbe https://doi.org/10.5194/wcd-7-1619-2026

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September 4, 2026Weather and Climate DynamicsOpen Access

An energetic perspective on the impact of the Atlantic Multidecadal Variability on the West African Monsoon

View Full Paper

Ask AI

Bookmark

Authors

EMElsa Mohíno PMPaul‐Arthur Monerie JMJuliette Mignot

Discussion

Member takes

Overview

Climate modeling demonstrates that positive Atlantic Multidecadal phases increase Sahel rainfall by shifting the tropical rain belt northward, highlighting atmospheric energy transport mechanisms.

Key Points

To determine the energetic and atmospheric mechanisms through which Atlantic Multidecadal Variability influences West African Monsoon intensity and Sahel rainfall.
Conducted numerical climate experiments using coupled atmosphere-ocean models forced by an idealized Atlantic Multidecadal Variability sea surface temperature pattern.
Evaluated atmospheric energy budget adjustments, cross-equatorial energy flux, and regional vertical circulation responses over the Sahara and Sahel.
A positive phase of the Atlantic Multidecadal Variability increases atmospheric net energy via elevated surface latent heat flux, driving southward cross-equatorial energy transport and shifting the Intertropical Convergence Zone northward.
The northward shift amplifies Sahel rainfall through enhanced low-level convergence, upper-level divergence, and reduced mid-level dry-air intrusions driven by a weakened Saharan shallow meridional circulation.

Cite This Study

Mohíno et al. (2026) studied this question.

synapsesocial.com/papers/6a9a85345d9e33f25c630cbe https://doi.org/10.5194/wcd-7-1619-2026

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