国家重点研究发展计划(2019YFA0606803)；国家自然科学基金(42075099, 41675143, 42077192, 41621005)；中央高校基本科研基金(0207-14380169)
黑碳 (BC) 气溶胶对区域和全球气候变化具有重要影响。中国和印度是世界上最大的人为BC排放国。本文使用新一代的区域气候模式 RegCM4 研究了在冬季来自印度和中国主要地区的 BC 排放对于东亚气候的直接影响。结果表明：来自两地的总BC柱含量、大气顶和地表有效辐射强迫在东亚分别为1.784 mg/m2 、+1.982 W/m2和-2.170 W/m2。中国大陆和印度BC对区域气候的影响各不相同。印度BC会导致区域850 hPa附近和地表气温降低，而中国BC会导致区域850 hPa附近变暖和地表气温降低。此外，中国大陆BC由于排放更多、分布范围更广，因此造成东亚地区的气候响应更强，在调节东亚区域气候方面发挥着主导作用。总体来看，两地BC会造成850 hPa附近云量减少0.21%，850hPa附近气温升高 0.014 K，日照时数减少0.135 h/day，地表气温下降约0.091 K，感热通量下降1.161 W/m2，地表蒸发量下降0.027 mm/day，边界层高度降低7.072 m，一次有机碳柱含量下降0.027 mg/m2，硫酸盐气溶胶柱含量上升0.035mg/m2。研究结果进一步反映了东亚冬季气候对不同排放BC 的直接响应表现出了一定的非线性。
Black carbon (BC) aerosol have important impacts on regional and global climate change. China and India are the world"s largest anthropogenic BC emitters. In this paper, the newest generation of regional climate model RegCM4 is used to investigate the direct impact of BC emissions from major areas of India and China on east Asian climate in winter. The results show that the total BC column burden, top of atmospheric and surface effective radiative forcing from east Asia are 1.784 mg/m2, +1.982 W/m2 and -2.170 W/m2, respectively. The influence of BC in China and India on regional climate is different. The Indian BC will cause the regional 850 hPa and surface cooling, while the Chinese BC will cause the regional 850 hPa warming and surface cooling. In addition, BC inChina has a stronger climate response in East Asia due to its higher emissions and wider distribution, and plays a leading role in regulating the regional climate in East Asia. In general, BC in both places will cause cloud cover to decrease by 0.21% near 850hPa, air temperature to increase by 0.014 K near 850hPa, sunshine duration to decrease by 0.135 h/day, surface air temperature to decrease by about 0.091 K, sensible heat flux to decrease by 1.161 W/m2. Surface evaporation decreased by 0.027 mm/day, boundary layer height decreased by 7.072 m, POA column burden decreased by 0.027 mg/m2, sulfate aerosol column burden increased by 0.035mg/m2. The results further suggest that the direct response of east Asian winter climate to different BC emissions is nonlinear.