| 摘要: |
| 【目的】为探索毕节连续空气污染过程中气象条件和地形作用的关系。【方法】本文应用相关性统计和天气学分析方法开展气象特征分析。【结果】研究表明：近5 a毕节空气污染加剧，2023年12月污染日数持平历史极值，连续污染过程中毕节AQI与日降雨量、高温和风速的相关系数分别为-0.454、0.437和-0.454，呈中度相关；污染过程中毕节均有逆温特征，850 hPa毕节区域南北风势力相当，地面热低压发展，风速弱。受南北地形影响，两侧地形的抬升和阻挡作用使得地面气流流通受阻，更容易在毕节出现静稳天气，导致污染物累积加剧。【结论】该文的研究成果指明了毕节连续空气污染过程的气象因子特征，为提前采取管控措施提升环境空气质量提供气象支撑依据。 |
| 关键词: 空气污染；毕节市；气象条件；相关性；逆温； |
| DOI： |
| 投稿时间：2024-03-07修订日期：2024-07-18 |
| 基金项目:毕节市科技局联合基金项目（毕科联合[2024]1号）：七星关区中心城区空气污染变化特征及气象因子相关性分析 |
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| Meteorological characterization of a continuous air pollution process |
| yaolang |
| (Bijie Meteorological Bureau) |
| Abstract: |
| To explore the relationship between meteorological conditions and topography effect duringcontinuous air pollution process in Bijie City, this paper applies correlation statistics and meteorlogical analysismethods to carry out the analysis on meteorological characteristics. The results show that air pollution in Bijie hasinereased in the last five years, and the number of pollution days in December 2023 is equal to the historicalextreme value. During the continuous pollution process, the correlation coefficients of Bijies AOl to daily rainfall.high temperature, and wind speed are -0.454, 0. 437, and -0.454, respectively, showing a moderate correlation.The pollution process in Bijie is characterized by temperature inversion. At 850 hPa, the forces of north wind andsouth wind are comparable in Bifie region, the thermal low pressure develops on the suface, and the surface windspeed is weak. Influenced by the north-south topography, the lifting and blocking effect of the two sides of thetenain makes the circulation of the ground airflow blocked, so that stable-static weather is more easy to occur inBijie and cause an inerease in the accumulation of pollutants. ''The research results of this paper make clear themeteorological factor characteristics of the continuous air pollution process in Bijie, and could provide ameteorological support basis for taking control measures in advance to improve the ambient air quality. |
| Key words: Air pollution; Bijie City; meteorological conditions; correlation; inversion; |
