Impact of Volcanic Aerosol Hemispheric Symmetry on Sahel Rainfall

Wednesday, Jul 8, 2020

Studying the response of rainfall and aridity in the semi-arid African Sahel region to radiative perturbations is a matter of pressing humanitarian relevance, considering the region is highly sensitive to changes in monsoon precipitation, as much of the region’s workforce is employed in the agricultural industry (Hamro-Drotz and Programme 2011). In a new paper, led by Tess Jacobson (PEI) with co-authors Wenchang Yang (Geosciences), CIMES Director Gabe Vecchi (PEI/GEO/AOS), and AOS Faculty Member Larry Horowitz (GFDL), the authors use two different climate models, GFDL’s FLOR model (Vecchi et al. in J Clim 27(21):7994–8016, 2014) and NCAR’s CESM 1.1 model (Otto-Bliesner et al. in Bull Am Meteorol Soc 97(5):735–754, 2016), to characterize the response of rainfall in the Sahel to large volcanic eruptions based on the meridional symmetry of the volcanic eruptions. The paper was published online July 6 in Climate Dynamics.