Work

Observed decadal variability in West-African Sahel rainfall and their associated Monsoon anomalies

Year: 2013

Type: conference-paper

Abstract: West-African Sahel rainfall shows a large decadal signal, transitioning from wet conditions in the 1950s to dry conditions in the 1970s/80s.Only the quasi-decadal time-scale is significantly detected in the Sahel rainfall index during the 1970s and 1980s.This time-scale of rainfall variability appears to be related to two periods of dry conditions and one of relatively wet conditions in the mid-70s.The dominant quasi-decadal anomalies of West-African Monsoon have been reconstructed using Fourier transform for the 70s-80s, and subsequently assessed by the differences in wet and dry states.A strengthening of cross-equatorial Atlantic SST and pressure gradients can be related to an enhancement of monsoon flow and the northward shift of the ITCZ.

Source: Pure (Coventry University)

Authors: Dieppois, Bastien; id_orcid 0000-0001-7052-1483, Diedhiou, Arona, Fontaine, Bernard, Durand, Alain, Fournier, Matthieu, Xue, Yongkang

Institutions: University of California, Los Angeles, Colorado State University

Language: English

Topic: Climate variability and models

Subfield: Global and Planetary Change

Field: Environmental Science

Domain: Physical Sciences

SDG: Climate action

Open Access status: green

Funders: National Research Foundation, Inyuvesi Yakwazulu-Natali, South African National Space Agency

OpenAlex ID: W2769321712

FWCI:

Cites: 11

Cited by:

Related to: 10