Atlantic Meridional Mode (Q311)

Subject, term, tag: Atlantic Meridional Mode

Atlantic Meridional Mode (AMM)

Language	Label	Description	Also known as
English	Atlantic Meridional Mode	Subject, term, tag: Atlantic Meridional Mode	Atlantic Meridional Mode (AMM)

Statements

Instance of

Category

source version

IPCC Glossary v1.5

1 reference

Source

https://apps.ipcc.ch/glossary/

date accessed

27 May 2026

Part of

Working Group I: Climate Change 2021 – The Physical Science Basis

0 references

Definition

The Atlantic Meridional Mode (AMM) refers to the interannual to decadal variability of the cross-equatorial sea surface temperature gradients and surface wind anomalies in the tropical Atlantic. It modulates the strength and latitudinal shifts of the Inter-tropical Convergence Zone (ITCZ), which impacts regional rainfall over Northeast Brazil and Atlantic hurricane activity. See Section AIV.2.5 in Annex IV of the AR6 WGI report. (English)