符传博,丹利,唐家翔,佟金鹤.基于轨迹模式分析海口市大气污染的输送及潜在源区[J].环境科学学报,2020,40(1):36-42
基于轨迹模式分析海口市大气污染的输送及潜在源区
- Analysis of air polluted transportation and potential source in Haikou City based on trajectory model
- 基金项目：海南省自然科学基金（No.419MS108）；国家重点研发计划（No.2016YFA0602501）；国家自然科学基金（No.41630532，41275093）
- 符传博
- 1. 海南省气象科学研究所, 海口 570203;2. 中国科学院大气物理研究所东亚区域气候-环境重点实验室, 北京 100029;3. 海南省南海气象防灾减灾重点实验室, 海口 570203
- 丹利
- 中国科学院大气物理研究所东亚区域气候-环境重点实验室, 北京 100029
- 佟金鹤
- 1. 海南省气象科学研究所, 海口 570203;2. 海南省南海气象防灾减灾重点实验室, 海口 570203
- 摘要：基于2013-2018年海口市空气质量资料，利用HYSPLIT模式和美国国家环境预报中心（NCEP）提供的FNL资料，模拟近6年海口市500 m高度气流48 h的后向轨迹，分析了不同季节气流轨迹分布、聚类分析和潜在源区分布概率（WPSCF）特征.结果表明：近6年海口市的空气质量等级主要以优和良为主，占所有天数的97.1%，有2.9%的天数达到了轻度污染及其以上级别，O3从2015年开始成为海口市最主要的大气污染物.海口市影响气流有明显的季节变化，冬季主要受内地的大陆气流和东南沿海气流影响，春季和秋季以东南沿海气流为主，夏季多为来自西南方向的海洋性气流.气流轨迹和WPSCF的空间分布均表明，广东省是海口市大气污染物超标的主要贡献源区，此外，福建、江西、湖南和广西东部等地的潜在贡献也较大.
- Abstract：Based on the air quality data of Haikou City from 2013 to 2018, the 48 h backward trajectory of 500m high at Haikou City during the past 6 years were simulated, with the usage of trajectory model HYSPLIT and FNL data provided by the National Environmental Prediction Center (NCEP). The characteristics of airflow trajectory in different seasons, cluster analysis and potential source distribution probability (WPSCF) were analyzed and the results show that:①The air quality in Haikou City is mainly dominated by excellent and good in the past 6 years, accounting for 97.1% of all days, and 2.9% days of air quality in Haikou City reached the level of slight pollution and above. Otherwise, O3 has been the most important atmospheric pollutant in Haikou City since 2015. ②The airflow in affecting Haikou City has an obvious seasonal change. It is mainly affected by the hinterland and southeast coastal airflow in winter. In spring and autumn, the dominant airflow is mainly form the southeast coast. However, the oceanic airflow from southwest is the most frequent airflow in summer. ③The spatial distribution of airflow trajectory and WPSCF indicate that Guangdong Province is the main potential source of air pollutants transported in Haikou City. In addition, Fujian, Jiangxi, Hunan and eastern Guangxi also have large potential contribution of air pollutant in Haikou.
