Elucidating observed land surface feedbacks across sub-Saharan Africa

摘要: This study examines the role of terrestrial forcings on regional climate sub-Saharan Africa through application a multivariate statistical method, stepwise generalized equilibrium feedback assessment, to an array observational, reanalysis, and remote sensing data products. By applying multiple datasets, uncertainty robustness assessed land surface feedbacks are considered. The approach from our 2017 is expanded decompose relative contribution vegetation, soil moisture, oceanic forcings; investigate evapotranspiration (ET) partitioning in feedbacks; compare among four key regions, namely Sahel, Greater Horn Africa, West African monsoon region, Congo. ET differs notably regions between available observational datasets. Across as whole, impose relatively comparable impact year-round atmospheric conditions. most pronounced across semi-arid Sahel although with unique seasonality such regions. Moisture recycling dominant mechanism these positive moisture–vegetation–rainfall feedbacks. direct moisture anomalies conditions outweighed that leaf area index anomalies. There clear need for more extensive observations ET, its partitioning, uncertainties propagate into reliability moisture–ET feedbacks, particularly Sahel.