全球和亚洲人为气溶胶影响东亚气候的数值模拟研究  

Numerical study of East Asian climate responses to global and Asian anthropogenic aerosols

作　　者：谭楚岩 邓洁淳 吴雨飞 马艺铭 梁哲 吴晓玲 TAN Chuyan;DENG Jiechun;WU Yufei;MA Yiming;LIANG Zhe;WU Xiaoling(Key Laboratory of Meteorological Disaster,Ministry of Education,Nanjing University of Information Science&Technology,Nanjing 210044,China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学气象灾害教育部重点实验室,南京210044 [2]南京信息工程大学气象灾害预报预警与评估协同创新中心,南京210044

出　　处：《气象科学》2020年第4期438-448,共11页Journal of the Meteorological Sciences

基　　金：国家自然科学基金资助项目(41705054);江苏省基础研究计划青年基金资助项目(BK20170942);江苏省高校自然科学研究面上项目(17KJB170012);南京信息工程大学人才启动项目(2016r051);江苏高校优势学科建设工程资助项目(PAPD);大学生实践创新训练计划项目(201810300140);国家留学基金项目(201808320137)。

摘　　要：利用海气耦合的全球气候模式CSIRO-Mk3.6分析比较了全球和亚洲人为气溶胶对东亚各季节气候的不同影响。结果表明,全球和亚洲外人为气溶胶使得东亚地区年平均地表温度分别下降0.9℃和0.55℃。亚洲区域气溶胶强迫决定了东亚近地面降温的时空分布特征,而亚洲区域外气溶胶进一步增强了我国北方夏季的近地面降温。各个季节对流层中上层的降温主要受区域外气溶胶的影响,并引起东亚高空急流强度和位置的变化,造成夏季和秋季明显的经向环流异常。同时,亚洲气溶胶影响各季节东亚低层环流场的响应,使得东亚陆地降水减少,而区域外气溶胶则主要影响冬季中高纬度和夏、秋季南海地区的低层风场。总体上,亚洲区域内、外人为气溶胶会增强我国冬、夏季风低层环流,并共同决定南海地区的降水变化。The impacts of global and Asian Anthropogenic Aerosols(AA)on the East Asian climate in different seasons were analyzed and compared using an atmosphere-ocean coupled climate model CSIRO-Mk3.6.Results showed that annual-mean surface air temperature over East Asia was declined by 0.9℃ and 0.55℃ due to global and non-Asian AA.The temporal and spatial characteristics of surface cooling over East Asia were determined by Asian AA,which was amplified over northern China by non-Asian AA in summer.Mid-upper tropospheric cooling was mainly due to non-Asian AA in all seasons,leading to changes in the intensity and location of the East Asian upper-level jet stream and inducing significant anomalous meridional circulation in summer and autumn.Meanwhile,low-level circulation responses over East Asia were determined by Asian AA in all seasons,acting to reduce the land precipitation in this region.However,non-Asian AA played bigger roles in changing the low-level circulation over the mid-high latitudes in winter and over the South China Sea in summer and autumn.In general,both Asian and non-Asian AA acted to strengthen the East Asian summer and winter monsoons,and determined precipitation changes over the South China Sea.

关 键 词：人为气溶胶 东亚气候 数值模拟 

分 类 号：P467[天文地球—大气科学及气象学]