COATS:Comprehensive observation on the atmospheric boundary layer three-dimensional structure during haze pollution in the North China Plain  

作　　者：Qianhui LI Hongsheng ZHANG Xiaoye ZHANG Xuhui CAI Xipeng JIN Lu ZHANG Yu SONG Ling KANG Fei HU Tong ZHU 

机构地区：[1]Tianjin Key Laboratory for Oceanic Meteorology,Tianjin Meteorological Service Center,Tianjin Meteorological Bureau,Tianjin 300074,China [2]Laboratory for Climate and Ocean-Atmosphere Studies,Department of Atmospheric and Oceanic Sciences,School of Physics,Peking University,Beijing 100871,China [3]State Key Laboratory of Severe Weather and Key Laboratory of Atmospheric Chemistry of CMA,Chinese Academy of Meteorological Sciences,China Meteorological Administration(CMA),Beijing 100081,China [4]State Key Joint Laboratory of Environmental Simulation and Pollution Control,College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China [5]State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

出　　处：《Science China Earth Sciences》2023年第5期939-958,共20页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.42090031,42175092,92044301&91544216);the National Key R&D Program of China(Grant Nos.2016YFC0203306&2017YFC0209600);the National Research Program for Key Issues in Air Pollution Control(Grant Nos.DQGG0104&DQGG0106)。

摘　　要：The North China Plain(NCP)is troubled by severe haze pollution and the evolution of haze pollution is closely related to the atmospheric boundary layer(ABL).However,experimental and theoretical studies on the physical-chemical processes of the ABL in the NCP are lacking,with many scientific problems to be addressed.To solve these problems,the Comprehensive Observation on the Atmospheric boundary layer Three-dimensional Structure(COATS)during haze pollution was carried out in the NCP from 2016 to 2020.The COATS experiment adopted a"point-line-surface"spatial layout,obtaining both spatial-temporal profiles of the meteorological and environmental elements in the ABL and the turbulent transport data of fine particulate matter(PM_(2.5))in winter and summer.The research achievements are as follows.The spatial-temporal distribution characteristics of the ABL structure and PM_(2.5)concentrations in NCP were determined.The typical thermal structure of persistent heavy haze events and the pollutant removal mechanism by low-level jets were revealed.It was determined that the spatial structure of the ABL adjusted by the Taihang Mountains is responsible for the heterogeneous distribution of haze pollution in the NCP,and that mountain-induced vertical circulations can promote the formation of elevated pollution layers.The restraints of the atmospheric internal boundaries on horizontal diffusion of pollutants were emphasized.The contribution of the ABL to haze pollution in winter and summer was qualitatively compared and quantitatively estimated.The turbulent transport nature behind the relationship between the atmospheric boundary layer height(ABLH)and surface PM_(2.5)concentrations was analyzed.The concept of"aerosol accumulation layer"was defined,and the applicability of the material method in determining ABLH was clarified.A measurement system for obtaining the turbulent flux of PM_(2.5)concentrations was developed,and the turbulence characteristics of PM_(2.5)concentrations were demonstrated.The COATS experiment is of grea

关 键 词：COATS experiment Haze pollution ABL three-dimensional structure Aerosol accumulation layer Turbulent flux of PM_(2.5)concentrations North China Plain 

分 类 号：X513[环境科学与工程—环境工程]