气溶胶影响印度夏季风和东亚夏季风的研究进展

Aerosol's Impacts on the Indian Summer Monsoon and the East Asian Summer Monsoon: An Overview

印度半岛和东亚是气溶胶大值区,也是亚洲季风的主要影响区域,季风和季风降水的变化对季风区的经济尤其是农业生产有重大影响。气溶胶影响印度季风的研究开始较早,研究工作也较多,已取得了较为全面的进展。早期研究表明大气棕云导致负辐射强迫可减缓温室气体带来的增暖。现有研究表明吸收性气溶胶对印度季风爆发早期有增强作用,随后气溶胶对印度和东亚夏季风有减弱作用。由于影响季风的因子较多、研究工作较为复杂,现有的气溶胶影响亚洲季风的研究还存在不确定性。回顾和概括了前人的研究,通过气溶胶影响东亚季风与印度季风的对比,讨论现有研究的不足,并为未来气溶胶影响季风特别是影响东亚夏季风的研究指出方向。

India Peninsula and East Asia are high aerosol loading regions as well as major regions influenced by Asian monsoon. The changes of monsoon intensity and precipitation have great influence on economy,especially agricultural production of monsoon regions. There are many researches of impacts of aerosol on Indian monsoon,which have achieved many comprehensive progresses. Earlier researches show that atmospheric brown cloud caused negative radiative forcing and weakened the warming induced by greenhouse gases. Current researches show that absorbing aerosol enhanced the Indian monsoon and increased rainfall in pre-monsoon season,while the scattering effect of aerosol weakened the Indian summer monsoon and the East Asian summer monsoon and rainfall in monsoon season. Due to so many factors affecting the monsoon,researches of aerosol impacts on monsoon become more complex. Thus,these results remain uncertain. This paper reviews previous researches and generalizes the mechanisms of impacts of aerosols on Asian monsoon. By comparing the East Asian summer monsoon with the Indian summer monsoon,we discussed deficiencies of the prior researches,and pointed out the direction for future researches about the impact of aerosol on the Asian summer monsoon,especially on the East Asian summer monsoon.