【摘要】 利用河北省CAMx模式系统对冬奥期间张家口市崇礼赛区的PM_2.5浓度进行模拟分析，定量评估冬奥期间崇礼赛区气象条件贡献、PM_2.5来源贡献、张家口和北京的减排量。首先，模式检验结果表明，河北省CAMx模式能较好地模拟出冬奥会前期（2021年10-12月）崇礼赛区PM_2.5浓度。其次，结论为与2019年-2021年同期相比，冬奥会期间崇礼赛区气象条件有利，使PM_2.5浓度下降16%;崇礼赛区PM_2.5主要来自于本地排放和张家口其他区县的传输，贡献分别为49.5%、24.5%;冬奥期间张家口、北京的减排量大约为总排放量的40%～50%。更多还原

【Abstract】 Taking Hebei province CAMx model system as an example, the PM_2.5 concentration of Chongli district of Zhangjiakou during the 2022 Beijing Olympic Winter Games is simulated analyzed to quantitatively evaluate meteorological conditions contribution for PM_2.5 sources in Chongli Distric and the emissions reduction and effect of Beijing and Zhangjiakou during the Olympic Winter Games. The CAMx model can effectively simulate the PM_2.5 concentration in the Chongli during the October to December in 2021. The results show that the meteorological conditions in Chongli during the Olympic Winter Games were favorable, resulting in a 16% reduction in PM_2.5 concentration compared with the same period from 2019 to 2021. PM_2.5 pollutants in Chongli were mainly from local emission sources and transported from other counties of Zhangjiakou, with percentages of 49.5%, 24.5%, respectively. Zhangjiakou and Beijing reduced about 40%～50% of total emissions during the Olympic Winter Games.更多还原