Abstract：A severe haze episode, which occurred over the Yangtze River Delta (YRD) and its surrounding regions from 1December to 9 December, 2013, was investigated using the coupled WRF-CMAQ modeling system. The temporal and spatial distribution characteristics and regional transport process of fine particulate matter (PM2.5) during this episode were investigated. Contributions from regional transport and local emission to PM2.5 concentration over the YRD region were also quantified. Results show that the WRF-CMAQ model could reproduce the temporal and spatial distributions and evolution characteristics of PM2.5 over the YRD its surrounding regions during the haze episode. Regional transport process plays a significant role even under the stable weather situation. During this episode, the contribution percentage of PM2.5 from Anhui, Southern Shandong, and Northern Jiangsu to the YRD region are 3.5%~24.9%, 0.14%~30.0% and 0.03%~17.5%, respectively. Local contribution to the YRD region is equal to the total contributions from outside areas, occupying 49% of the total contribution.
李锋, 朱彬, 安俊岭, 康汉青, 高晋徽, 刘璇. 2013年12月初长江三角洲及周边地区重霾污染的数值模拟[J]. 中国环境科学, 2015, 35(7): 1965-1974.
LI Feng, ZHU Bin, AN Jun-Ling, KANG Han-Qing, GAO Jin-Hui, LIU Xuan. Modeling study of a severe haze episode occurred over the Yangtze River Delta and its surrounding regions during early December, 2013. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(7): 1965-1974.
