East Asian aerosol cleanup has likely contributed to the recent acceleration in global warming
Le nettoyage des aérosols en Asie de l'Est a probablement contribué à la récente accélération du réchauffement climatique
Samset, Bjørn H. ; Wilcox, Laura J. ; Allen, Robert J. ; Stjern, Camilla W. ; Lund, Marianne T. ; Ahmadi, Sharar ; Ekman, Annica ; Elling, Maxwell T. ; Fraser-Leach, Luke ; Griffiths, Paul ; Keeble, James ; Koshiro, Tsuyoshi ; Kushner, Paul ; Lewinschal, Anna ; Makkonen, Risto ; Merikanto, Joonas ; Nabat, Pierre ; Narazenko, Larissa ; O'Donnell, Declan ; Oshima, Naga ; Rumbold, Steven T. ; Takemura, Toshihiko ; Tsigaridis, Kostas ; Westervelt, Daniel M.
Global surface warming has accelerated since around 2010, relative to the preceding half century. This has coincided with East Asian efforts to reduce air pollution through restricted atmospheric aerosol and precursor emissions. A direct link between the two has, however, not yet been established. Here we show, using a large set of simulations from eight Earth System Models, how a time-evolving 75% reduction in East Asian sulfate emissions partially unmasks greenhouse gas-driven warming and influences the spatial pattern of surface temperature change. We find a rapidly evolving global, annual mean warming of 0.07?±?0.05?°C, sufficient to be a main driver of the uptick in global warming rate since 2010. We also find North-Pacific warming and a top-of-atmosphere radiative imbalance that are qualitatively consistent with recent observations. East Asian aerosol cleanup is thus likely a key contributor to recent global warming acceleration and to Pacific warming trends.</p>
Accès à la notice sur le site du portail documentaire de Météo-France