Abstract:Andean glaciers have melted rapidly since the 1960s. While some melting is likely due to anthropogenic climate change driven by increasing greenhouse gases, deposition of light-absorbing particles such as black carbon (BC) may also play a role. We hypothesize that BC from fires in the Amazon Basin and elsewhere may be deposited on Andean glaciers, reducing the surface albedo and inducing further melting. Here we investigate the role of BC deposition on albedo changes in the Andes for 2014-2019 by combining atm… Show more
“…Aerosol optical depth (AOD) of the Central Andes has a strong seasonality with a peak season between August and October (Pérez-Ramírez et al 2017). While GHG-driven surface warming plays a role in melting the glaciers over the Andes, increases in deposition of anthropogenic aerosols, such as black carbon from biomass burning and atmospheric particulates from local mining activities, affect the regional climate (Csavina et al 2012;Cereceda-Balic et al 2022;Bonilla et al 2023). The role of these anthropogenic aerosols in spring droughts over the Central Andes still remains unknown.…”
CMIP6 simulations showed a weak human contribution to 2022-like Central Andes spring droughts, due to compensating impacts between anthropogenic greenhouse gases and aerosols.
“…Aerosol optical depth (AOD) of the Central Andes has a strong seasonality with a peak season between August and October (Pérez-Ramírez et al 2017). While GHG-driven surface warming plays a role in melting the glaciers over the Andes, increases in deposition of anthropogenic aerosols, such as black carbon from biomass burning and atmospheric particulates from local mining activities, affect the regional climate (Csavina et al 2012;Cereceda-Balic et al 2022;Bonilla et al 2023). The role of these anthropogenic aerosols in spring droughts over the Central Andes still remains unknown.…”
CMIP6 simulations showed a weak human contribution to 2022-like Central Andes spring droughts, due to compensating impacts between anthropogenic greenhouse gases and aerosols.
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