我国夏季风过渡区陆-气相互作用研究的新进展

New progresses in the study of land-atmosphere interaction in summer monsoon transition zone in China

中国夏季风过渡区是全球陆-气相互作用强盛区域之一,也是极端天气灾害频发且易造成严重经济损失的区域,对过渡区陆-气相互作用的进一步认识将有助于提升该区域防灾减灾能力。以近年来中国气象局干旱气候变化与减灾重点实验室为平台开展的夏季风过渡区相关项目群取得的研究成果为基础,对过渡区陆-气相互作用时空分布规律、陆面水分收支对夏季风响应新特征、边界层时空变化特征及发展机制、季风与陆-气相互作用对区域气候影响、陆-气相互作用对作物产量影响以及多因子和多尺度动力学粗糙度参数化方案等方面的新进展进行系统总结,并根据夏季风过渡区陆-气作用研究的发展趋势,提出今后应在侧重加强陆-气交换多循环过程对夏季风年循环响应规律研究基础上,探讨陆-气相互作用对夏季风的多尺度动态响应,建立地表过程和大气边界层关键物理量的气候动力学关系,以改进和提升区域气候模式模拟水平。该工作对推动我国陆-气耦合过程的研究具有重要意义。

The summer monsoon transition zone in China is one of the regions with strong land-atmosphere interaction in the world,and it is also an area where extreme weather disasters are frequent and easy to cause serious economic losses.Further understanding of land-atmosphere interaction in the transition area will help to improve the disaster prevention and mitigation ability of this region.Based on the research results of the summer monsoon transition area related projects carried out by the Key Laboratory of Drought Climate Change and Disaster Reduction of China Meteorological Administration in recent years,this paper systematically summarizes the new progresses of land-atmosphere interaction in the summer monsoon transition zone,including the spatio-temporal distribution law of land-atmosphere interaction in the transition region,the new characteristics of the response of land surface water budget to summer monsoon,the spatio-temporal variation characteristics and development mechanism of the boundary layer,the influence of monsoon and land-atmosphere interaction on regional climate in the transition zone,the new progress of land-atmosphere interaction on crop yield in the transition zone and new schemes for parameterization of multi-factor and multi-scale kinetic roughness.According to the development trend of land-atmosphere interaction research in the summer monsoon transition zone,it is proposed that the multiscale dynamic response of land-atmosphere interaction to summer monsoon should be explored in the future,and the climatic dynamic relationship between surface processes and key physical quantities in the atmospheric boundary layer should be established on the basis of the research on the response rule of land-atmosphere exchange multi-cycle process to the annual cycle of summer monsoon in order to improve and enhance the simulation of regional climate models in the future.This work is of great significance to promote the research of land-atmosphere coupling process in China,which can provide scientific and technological support for disaster prevention and mitigation in the summer monsoon transition zone in China.