近6年西藏地区空气环境质量变化趋势分析

Trend analysis of air quality changes in Tibet over the past six years

本文分析了西藏自治区7个地市的6种大气污染物数据,结果表明:1)研究区域内2017—2022年的空气环境质量呈现明显的逐年变好的趋势;2)研究区域内空气环境质量变化具有一定的季节规律,春冬季节的空气环境质量明显差于夏秋季节;3)研究区域内不同空气污染物的质量变化具有不同的规律,污染物浓度的变化与其独特的地理环境以及气候环境密不可分;4)气象条件对PM_(2.5)污染的影响具有滞后性和持续性,气象因子对PM_(2.5)的影响随时间呈现不平衡。总体而言,到目前为止研究区域空气环境质量依然保持着良好的状态,受人为影响不明显,但是,臭氧、二氧化硫等气体的影响不容忽视,需要进一步加强监测研究与有效控制。

This paper examines six major air pollutants in seven municipalities of the Tibetan Autonomous Region.The findings indicate:1)The air environmental quality in the study area has shown a clear annual improvement trend from 2017 to 2022;2)There is a seasonal pattern in the changes of air environmental quality,with spring and winter seasons being significantly worse than summer and autumn;3)Different pollutants exhibit distinct patterns of quality change,which are closely related to the unique geographical and climatic conditions;4)Meteorological conditions have a lagging and persistent impact on PM_(2.5)pollution,with the influence of meteorological factors on PM_(2.5)showing an unbalanced distribution over time.Overall,the air environmental quality in the study area remains good and less affected by human activities,but the impact of pollutants such as ozone and sulfur dioxide should not be overlooked,necessitating further monitoring research and effective control.