West African Monsoon (WAM) and Atlantic Cold Tongue (ACT) onsets using Regional Climate Model

Abstract

This study focused on the occurrences and relationships of the Atlantic Cold Tongue (ACT) and theThese results also indicated that the monsoon onset did not depend on the SST dataset used to force the model. Finally, the negative difference between ODIs and ACT onset date could be due to warm SST. The yearly evolution of the southern heat transport was also in agreement with this difference. It showed yearly succession of negative and positive anomalies around 7.5°N (mean rainy equilibrium position over West Africa). Such study could be useful for the forecast of WAM onset and ACT scenario relationships.