摘要
利用空气质量自动监测数据,分析了2022年甘南州空气质量状况,及PM_(10)和PM_(2.5)浓度月度、季节及日变化特征,发现由沙尘导致的PM_(10)浓度升高是甘南州的主要污染天气。结合天气形势和HYSPLIT后向轨迹等资料,以一次典型的高原沙尘传输过程为研究对象,结果表明:3月17~18日,青藏高原午后动量下传大风产生沙尘天气,沙尘气团东移影响甘南州,过程中PM_(10)小时浓度峰值达647μg/m^(3),为严重污染级别。后向轨迹传输路径也显示,本次沙尘重污染来自甘南州西北方向的青藏高原地区。
Using automatic air quality monitoring data,an analysis was conducted on the air quality status of Gannan Prefecture in 2022.Monthly,seasonal,and daily variations in PM_(10)and PM_(2.5)concentrations were also examined.It was discovered that the main cause of pollution in Gannan Prefecture was the increase in PM_(10)concentrations due to sandstorms.By combining weather patterns and information from HYSPLIT backward trajectories,a typical high-altitude sandstorm transport event was selected as the research object.The results showed that on March 17th to 18th,strong winds were generated due to the downward transfer of momentum in the afternoon on the Qinghai-Tibet Plateau,leading to sandstorm weather.The sandstorm air mass moved eastward and affected Gannan Prefecture,with the peak hourly concentration of PM_(10)reaching 647μg/m^(3),which is classified as severe pollution.The backward trajectory of the transport path indicated that the sand and dust air mass originated from the northwest direction of Gannan Prefecture,which is the Qinghai-Tibet Plateau region.
作者
陶会杰
王莉娜
Tao Huijie;Wang Lina(Gansu Province Environmental Monitoring Center,Lanzhou,Gansu 730020,China)
出处
《绿色科技》
2023年第12期77-80,共4页
Journal of Green Science and Technology
基金
甘肃省自然科学基金项目(编号:21JR7RA737)。
关键词
沙尘天气
天气形势
后向轨迹
甘南州
dust weather
weather situation
backward trajectory
Gannan Prefecture
作者简介
陶会杰(1985-),女,硕士,高级工程师,研究方向为环境空气质量预报。
