Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2018, Vol. 54 ›› Issue (4): 705-712.DOI: 10.13209/j.0479-8023.2018.021

Previous Articles     Next Articles

Interdiurnal and Diurnal Variation of PM2.5 Concentration in Beijing, Shanghai, and Lhasa in 2015

ZHANG Dongjian, XUE Huiwen   

  1. Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871
  • Received:2017-05-06 Revised:2017-08-24 Online:2018-07-20 Published:2018-07-20
  • Contact: XUE Huiwen, E-mail: hxue(at)


张冬健, 薛惠文   

  1. 北京大学物理学院大气与海洋科学系, 北京 100871
  • 通讯作者: 薛惠文, E-mail: hxue(at)
  • 基金资助:


The temporal variation of PM2.5 concentration in Beijing, Shanghai and Lhasa in 2015 is investigated. Then, the analyses on their seasonal variation and comparison of the relative importance of diurnal variation and daily variation are conducted. Results show that the PM2.5 concentration is generally higher in winter than that in summer from a long-term view. From a short-term view, the variation of PM2.5 concentration in Beijing and Shanghai mainly demonstrates interdiurnal feature, and the synoptic systems exert profound impacts. The wintertime PM2.5 concentration in Beijing also displays diurnal variation, but it is not evident in summer. In Shanghai, the diurnal cycle is not significant in both winter and summer. On the contrary, the synoptic system over Lhasa is stable. The daily variation is weak, while the diurnal variation is strong. The variation of PM2.5 concentration is hence featured by two peaks.

Key words: PM2.5, seasonal variation, daily variation, diurnal variation, Beijing, Shanghai, Lhasa


分析2015年北京、上海和拉萨3个城市PM2.5浓度的时间序列, 讨论PM2.5浓度的季节变化以及各城市PM2.5浓度日际变化与日变化的相对重要性。从长期来看, 3个城市冬季PM2.5浓度普遍大于夏季; 从短期来看, 北京和上海 PM2.5浓度主要呈现日际变化, 天气系统的影响远大于日变化。北京冬季 PM2.5浓度在一定程度上也呈现日变化, 但在夏季不明显; 上海在冬季和夏季都不呈现日变化; 拉萨的情况则相反, 当地的天气系统比较稳定, 日际变化不明显, PM2.5浓度主要受日变化影响, PM2.5浓度的日变化呈现明显的“双峰”现象。

关键词: PM2.5, 季节变化, 日际变化, 日变化, 北京, 上海, 拉萨

CLC Number: