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东亚冬季风异常对区域气溶胶分布的影响
引用本文:谢旻,王体健,高达,李树,庄炳亮,刘芷君. 东亚冬季风异常对区域气溶胶分布的影响[J]. 气候与环境研究, 2021, 26(4): 438-448. DOI: 10.3878/j.issn.1006-9585.2020.20155
作者姓名:谢旻  王体健  高达  李树  庄炳亮  刘芷君
作者单位:南京大学大气科学学院,南京210023
基金项目:国家重点研发计划项目 2018YFC0213502、2018YFC1506404,国家自然科学基金项目 41475122,重庆市气象局开放式研究基金项目 KFJJ-201607
摘    要:气溶胶已是东亚地区最主要的大气污染物之一,其时空分布会受到东亚季风气候的影响.利用2000~2014年MODIS/AOD (Moderate-resolution Imaging Spectroradiometer/Aerosol Optical Depth)和NCEP月平均气象场再分析资料,本研究分析了东亚冬季风长期...

关 键 词:东亚冬季风  季风指数  气溶胶  气溶胶光学厚度(AOD)
收稿时间:2020-09-16

Impact of Anomalous East Asian Winter Monsoon on the Spatial Distribution of Aerosols over East Asia
Min XIE,Tijian WANG,Da GAO,Shu LI,Bingliang ZHUANG,Zhijun LIU. Impact of Anomalous East Asian Winter Monsoon on the Spatial Distribution of Aerosols over East Asia[J]. Climatic and Environmental Research, 2021, 26(4): 438-448. DOI: 10.3878/j.issn.1006-9585.2020.20155
Authors:Min XIE  Tijian WANG  Da GAO  Shu LI  Bingliang ZHUANG  Zhijun LIU
Affiliation:School of Atmospheric Science, Nanjing University, Nanjing 210023
Abstract:Aerosol is one of the most significant air pollutants in East Asia. Its temporal and spatial distribution can be affected by the East Asia winter monsoon. Using the Moderate-resolution Imaging Spectroradiometer (MODIS) aerosol product and the National Center for Environmental Prediction (NCEP) reanalysis monthly meteorological field data between 2000 and 2014, this study statistically analyzes the variation trend of the East Asia winter monsoon (EAWM), the annual variation of the aerosol optical depth (AOD) over East Asia, and the effect of the anomalous EAWM on the distribution of aerosols. The analysis based on the aerosol product shows that the AOD values continually increase during the recent decade in the winter of East Asia with a maximum value of 0.44 in 2007. High values usually occur in the Sichuan Basin, the North China Plain, and most areas of the middle and lower reaches of Yangtze. With the aid of the EAWM index defined by the characteristics of the wind field, the EAWM is found to have strong interannual and interdecadal variations and exhibits a gradually decreasing trend. Results also show that the EAWM has a considerable effect on the spatial distribution of aerosols. In strong EAWM years, the stronger north wind can enhance the transportation of aerosols to the southern area and form the spatial distribution pattern of the north low and south high for the AOD over East Asia. However, in weak EAWM years, the transportation effect is weakened, resulting in the accumulation of more aerosols in the North China Plain and the formation of the AOD pattern of the north high and south low.
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