Influence of extratropical cyclones on air quality in Beijing

Dong, Peiyun; Chen, Lei; Yan, Yingying

doi:10.1016/j.atmosres.2022.106552

Cited by 3 publications

(1 citation statement)

References 72 publications

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“…Regarding diurnal fluctuations, due to the dense urbanization in the Beijing area, it stores more heat during HW periods. Moreover, the strengthening of WPSHI also leads to increased stable airflows and aerosol pollution (Dong et al., 2023; Gong & He, 2002; Qu et al., 2013; Wu et al., 2019; Zong et al., 2023). These factors cause the urban area of Beijing to experience weaker nighttime cooling compared to rural areas, resulting in higher peak values for diurnal fluctuations, thereby making diurnal fluctuations more prominent.…”

Section: Discussionmentioning

confidence: 99%

Elucidating the Multi‐Timescale Variability of a Canopy Urban Heat Island by Using the Short‐Time Fourier Transform

Zhang,

Luo,

Pan

et al. 2024

Geophysical Research Letters

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Taking the megacity of Beijing as an example, a short‐time Fourier transform (STFT) method was employed to extract the multi‐timescale evolution pattern of the canopy urban heat island intensity (CUHII) during 2000–2020. The STFT of CUHII showed a close relationship between the evolution of the CUHII in Beijing and the background meteorological forcing at intra‐annual, weather and intra‐daily scales. The intra‐annual‐scale spectrum of CUHII exhibited an increasing trend with obvious seasonal variation of the canopy urban heat island (CUHI). The intra‐daily‐scale spectrum of CUHII showed an increasing trend with the nighttime CUHI developing faster. Increasing Western Pacific Subtropical High intensity can enhance the seasonal and diurnal fluctuations of CUHII. The weather‐scale spectrum of CUHII is controlled by weather system evolution, showing that the frequency of cold/heat waves (CWs/HWs) in Beijing was significantly negatively correlated with the weather‐scale spectral intensity of the CUHII. CWs and HWs can increase the CUHII for a long duration.

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