1] Department of Atmospheric Sciences, Center for Atmospheric Chemistry and the Environment, Texas A&M University, College Station, 77843 Texas, USA [2] Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA.
1] Department of Atmospheric Sciences, Center for Atmospheric Chemistry and the Environment, Texas A&M University, College Station, 77843 Texas, USA [2] State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
Nat Commun. 2014;5:3098. doi: 10.1038/ncomms4098.
Increasing levels of anthropogenic aerosols in Asia have raised considerable concern regarding its potential impact on the global atmosphere, but the magnitude of the associated climate forcing remains to be quantified. Here, using a novel hierarchical modelling approach and observational analysis, we demonstrate modulated mid-latitude cyclones by Asian pollution over the past three decades. Regional and seasonal simulations using a cloud-resolving model show that Asian pollution invigorates winter cyclones over the northwest Pacific, increasing precipitation by 7% and net cloud radiative forcing by 1.0 W m(-2) at the top of the atmosphere and by 1.7 W m(-2) at the Earth's surface. A global climate model incorporating the diabatic heating anomalies from Asian pollution produces a 9% enhanced transient eddy meridional heat flux and reconciles a decadal variation of mid-latitude cyclones derived from the Reanalysis data. Our results unambiguously reveal a large impact of the Asian pollutant outflows on the global general circulation and climate.
亚洲人为气溶胶水平的增加引起了人们对其对全球大气潜在影响的极大关注，但相关气候强迫的量级仍有待量化。在这里，我们使用一种新的层次建模方法和观测分析，证明了过去三十年亚洲污染对中纬度气旋的调节作用。使用云解析模型进行的区域和季节性模拟表明，亚洲污染使西北太平洋冬季气旋活跃，在大气顶层增加降水 7%，净云辐射强迫增加 1.0 W m(-2)，在地球表面增加 1.7 W m(-2)。一个包含亚洲污染的非绝热加热异常的全球气候模式产生了 9%的瞬态涡动经向热通量增强，并调和了再分析数据得出的中纬度气旋的年代际变化。我们的结果明确揭示了亚洲污染物排放对全球环流和气候的巨大影响。
