Romain Marteau

TL;DR: A multi-year on-farm field campaign over 10 villages in South-West Niger, is analysed to investigate how rainfall determines the sowing date of pearl millet and the risk of sowing failure, and the relationships between sowing dates, onset dates and observed yield and biomass at the end of the season.

TL;DR: In this paper, three main modes of variability have been identified, two with a mean periodicity of 15 days and one with an average periodicity around 40 days, which are mainly controlled by atmospheric dynamics and land-surface interactions.

TL;DR: The spatial coherence of the boreal monsoon onset over the western and central Sahel (Senegal, Mali, Burkina Faso) is studied through the analysis of daily rainfall data for 103 stations from 1950 to 2000.

TL;DR: In this article, the authors focused on some recent changes observed in the Tropics with special emphasis on the African monsoon region using high-resolution gridded precipitation from the Climatic Research Unit (period 1979-2002), outgoing longwave radiation at the top of the atmosphere from the National Oceanic and Atmospheric Administration and atmospheric reanalyses from the Climate Prediction Center (NCEP-DOE2, period 1979-2007).

TL;DR: In this article, the Madden-Julian Oscillation (MJO) is extracted over the Indo-Pacific basin using a Local Mode Analysis (LMA) and the convective perturbations are then projected over a larger domain to evaluate their remote consequences over the West African monsoon (WAM) intraseasonal variability.