2025-07-14 カリフォルニア大学リバーサイド校(UCR)
<関連情報>
- https://news.ucr.edu/articles/2025/07/14/cleaner-east-asian-air-unmasks-much-hotter-planet
- https://www.nature.com/articles/s43247-025-02527-3
東アジアのエアロゾル浄化が近年の温暖化加速に寄与している可能性が高い East Asian aerosol cleanup has likely contributed to the recent acceleration in global warming
Bjørn H. Samset,Laura J. Wilcox,Robert J. Allen,Camilla W. Stjern,Marianne T. Lund,Sharar Ahmadi,Annica Ekman,Maxwell T. Elling,Luke Fraser-Leach,Paul Griffiths,James Keeble,Tsuyoshi Koshiro,Paul Kushner,Anna Lewinschal,Risto Makkonen,Joonas Merikanto,Pierre Nabat,Larissa Narazenko,Declan O’Donnell,Naga Oshima,Steven T. Rumbold,Toshihiko Takemura,Kostas Tsigaridis & Daniel M. Westervelt
Communications Earth & Environment Published:14 July 2025
DOI:https://doi.org/10.1038/s43247-025-02527-3
Abstract
Global surface warming has accelerated since around 2010, relative to the preceding half century1,2,3. This has coincided with East Asian efforts to reduce air pollution through restricted atmospheric aerosol and precursor emissions4,5. 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.