Advances in studying interactions between aerosols and monsoon in China |
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Authors: | GuoXiong Wu ZhanQing Li CongBin Fu XiaoYe Zhang RenYi Zhang RenHe Zhang TianJun Zhou JianPing Li JianDong Li DeGang Zhou Liang Wu LianTong Zhou Bian He RongHui Huang |
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Affiliation: | 1. LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China 2. College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100875, China 3. School of Atmospheric Sciences, Nanjing University, Nanjing, 210093, China 4. Chinese Academy of Meteorological Sciences, Chinese Meteorological Administration, Beijing, 100081, China 5. Department of Atmospheric Sciences, Texas A & M University, Texas, 77843, USA 7. Joint Center for Global Change Studies, Beijing Normal University, Beijing, 100875, China 6. CMSR, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
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Abstract: | Scientific issues relevant to interactions between aerosols and the Asian monsoon climate were discussed and evaluated at the 33rd “Forum of Science and Technology Frontiers” sponsored by the Department of Earth Sciences at the Chinese Academy of Sciences. Major results are summarized in this paper. The East Asian monsoon directly affects aerosol transport and provides a favorable background circulation for the occurrence and development of persistent fog-haze weather. Spatial features of aerosol transport and distribution are also influenced by the East Asian monsoon on seasonal, inter-annual, and decadal scales. High moisture levels in monsoon regions also affect aerosol optical and radiative properties. Observation analyses indicate that cloud physical properties and precipitation are significantly affected by aerosols in China with aerosols likely suppressing local light and moderate rainfall, and intensifying heavy rainfall in southeast coastal regions. However, the detailed mechanisms behind this pattern still need further exploration. The decadal variation in the East Asian monsoon strongly affects aerosol concentrations and their spatial patterns. The weakening monsoon circulation in recent decades has likely helped to increase regional aerosol concentrations. The substantial increase in Chinese air pollutants has likely decreased the temperature difference between land and sea, which favors intensification of the weakening monsoon circulation. Constructive suggestions regarding future studies on aerosols and monsoons were proposed in this forum and key uncertain issues were also discussed. |
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