Foreshowing of the Western Pacific tropical cyclone track to PM10 air pollution episode in the Beijing area

Wang, Xiquan; Wang, Zifa; Yu, Tao; Gong, Yun

doi:10.1007/s11434-008-0562-4

Cited by 10 publications

(2 citation statements)

References 5 publications

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“…This result suggests that northward typhoons play an important role in PM 2.5 pollution in NCP, and is consistent with X. Wang et al. (2008), who found that 8 out of 10 northward typhoons were associated with air pollution events in Beijing in 2004. Therefore, in this work, we focus on the impacts of northward typhoons on haze pollution in NCP.…”

Section: Relationship Between Typhoons and Haze Pollution Over The Nc...supporting

confidence: 90%

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Impacts of Northward Typhoons on Autumn Haze Pollution Over North China Plain

Lin,

Ding,

Huang

et al. 2024

JGR Atmospheres

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Although air quality in China has improved substantially over recent years, haze pollution events still occur frequently, especially over the North China Plain (NCP). Previous studies showed that typhoons are conducive to regional pollution events in eastern China; however, the underlying mechanism and quantitative understanding of the typhoons' impact on haze pollution remain unclear there. Here, based on ground‐based and satellite observations, reanalysis data, and model simulations, we show that northward typhoons approaching China are essential for autumn haze pollution over NCP. Elevated relative humidity levels and enhanced pollution accumulation, caused by northward typhoons and the corresponding high‐pressure systems, are responsible for the pollution enhancements over NCP. Compared with episodes without typhoon influence, cities near Taihang and Yan Mountain suffer from heavier haze pollution when typhoons approach, with PM2.5 concentrations increasing from 87.1 to 106.4 μg m−3. More water vapor from the Yellow and Bohai Seas and pollutants from eastern China are transported to these cities by typhoon‐induced southeasterly wind anomalies, facilitating the chemical formation of aerosols there. In addition, by the block of mountains, these southeasterly wind anomalies also lead to stronger local accumulation over cities and an elevation of pollutants along the mountains. What is more, with the implementation of emission reduction, the relative changes of PM2.5 concentrations between typhoon‐induced episodes and no‐typhoon episodes increase. This work highlights the importance of understanding the impact of synoptical weather on PM2.5 transport, accumulation, and formation processes in haze pollution mitigation in eastern China.

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Section: Relationship Between Typhoons and Haze Pollution Over The Nc...supporting

confidence: 90%

“…As for NCP, previous studies also stressed the importance of typhoon impacts on haze pollution in this region (Cao et al, 2018;Shao et al, 2022;X. Wang et al, 2008).…”

Section: Introductionmentioning

confidence: 95%

Impacts of Northward Typhoons on Autumn Haze Pollution Over North China Plain

Lin,

Ding,

Huang

et al. 2024

JGR Atmospheres

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Net anthropogenic nitrogen accumulation in the Beijing metropolitan region

Han

Nan

2010

Environ Sci Pollut Res

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The average NANA values for the urban and suburban areas from 1991 to 2007 were 24,038 and 13,090 kg N km(-2) year(-1), respectively. NANA is higher in eastern and southern areas than in northern and western areas, and higher in the urban area than in the suburban area. The overall average NANA in Beijing has a downward trend from 15,187 kg N km(-2) year(-1) in 1991 to 11,606 kg N km(-2) year(-1) in 2007, but is still two to five times as that of developed countries. N input from nitrogenous fertilizer is the largest source of NANA, accounting for 44.4% (6,764 kg N km(-2) year(-1)) of the total N input, followed by atmospheric N deposition and N in human food and animal feed. NANA is closely related to land use, on average 23,140 kg N km(-2) year(-1) in densely populated developed land, 17,904 kg N km(-2) year(-1) in agricultural land, and 10,445 kg N km(-2) year(-1) in forest land. Human population density is the best single predictor of NANA.

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