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在四川盆地,中国西南部,季节性臭氧变化对大气过程的地形影响

Zhuozhi Shu¹, Tianliang Zhao², Yongsheng Chen³

¹Sichuan Academy of Environmental Sciences, Chengdu 610041, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science &Technology, Nanjing, 210044, China.

Environmental pollution (Barking, Essex : 1987)

|October 2, 2023

概括

四川盆地的地形加剧了夏季臭氧污染,同时降低了冬季的水平. 这种复杂的地形显著影响大气过程,影响全年区域空气质量.

科学领域:

大气化学和物理大气化学和物理
环境科学环境科学
气候学气候学气候学

背景情况:

复杂的地形,如四川盆地 (SCB),在理解大气环境变化方面提出了挑战.
地形影响显著影响区域空气质量,特别是热层臭氧 (O3) 度.
大气物理和化学过程的季节性变化对于空气质量评估至关重要.

研究的目的:

描述四川盆地热层臭氧 (O3) 的地形驱动的季节性变化.
分析盆地地形对大气物理和化学过程的影响,影响O3.
在复杂的地形下确定运输和光化学反应对O3演变的贡献.

主要方法:

使用了与化学 (WRF-Chem) 结合的天气研究和预测模型.
采用综合工艺速率 (IPR) 分析来剖析大气过程.
研究了O3的季节性和日间变化以及相关因素.

主要成果:

盆地地形加剧夏季的O3和减轻冬季的O3,季节性贡献范围从-40%到40%.
垂直的O3结构显示了由于盆地地形而导致的低热带层夏季的积极变化和冬季的负面变化.
由盆地地形加剧的垂直和水平运输是近地表O3的关键驱动因素,呈现季节和日间变化.

结论:

盆地地形通过与大气过程的复杂相互作用,显著改变季节性和日间O3模式.
高原-盆地热力学强迫增强了O3的运输,受山平原电磁体 (MPS) 效应的影响.
与季风和西风相互作用的地形效应对于理解像SCB这样的深盆地中的O3演变至关重要.

关键词:

大气过程是大气过程.四川流域的流域四川流域的流域地形影响影响地形影响热带层O ((3)) 是一个热带层.

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