South American monsoon (Q1040)
Subject, term, tag: South American monsoon
- South American monsoon (SAmerM)
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | South American monsoon |
Subject, term, tag: South American monsoon |
|
Statements
IPCC Glossary v1.5
1 reference
27 May 2026
The South American monsoon (SAmerM) is a regional circulation characterized by inflow of low-level winds from the Atlantic to South America, including Brazil, Peru, Bolivia and northern Argentina, associated with the development of surface pressure gradients (and intense precipitation) during austral summer (December–January–February). During September–October–November, areas of intense convection migrate from northwestern South America to the south. Associated with this regime, an upper-tropospheric anticyclone (a.k.a. the Bolivian High) forms over the Altiplano region during the monsoon onset. The SAmerM then retreats during March–April–May with a northeastward migration of the convection. Further details on how SAmerM is defined and used throughout the Report are provided in Annex V. (English)
IPCC Glossary v1.5
1 reference
27 May 2026