Significant changes in chemistry of fine particles in wintertime Beijing from 2007 to 2017: impact of clean air actions

Research output: Contribution to journalArticlepeer-review

Standard

Significant changes in chemistry of fine particles in wintertime Beijing from 2007 to 2017 : impact of clean air actions. / Zhang, Yangmei; VU, Van Tuan; Sun, Junying; He, Jianjun; Shen, Xiaojing; Lin, Weili; Zhang, Xiaoye; Zhong, Junting; Gao, Wenkang; Wang, Yaqiang; Fu, Tzung May; Ma, Yaping; Li, Weijun; Shi, Zongbo.

In: Environmental Science and Technology, Vol. 54, No. 3, 04.02.2020, p. 1344-1352.

Research output: Contribution to journalArticlepeer-review

Harvard

Zhang, Y, VU, VT, Sun, J, He, J, Shen, X, Lin, W, Zhang, X, Zhong, J, Gao, W, Wang, Y, Fu, TM, Ma, Y, Li, W & Shi, Z 2020, 'Significant changes in chemistry of fine particles in wintertime Beijing from 2007 to 2017: impact of clean air actions', Environmental Science and Technology, vol. 54, no. 3, pp. 1344-1352. https://doi.org/10.1021/acs.est.9b04678

APA

Zhang, Y., VU, V. T., Sun, J., He, J., Shen, X., Lin, W., Zhang, X., Zhong, J., Gao, W., Wang, Y., Fu, T. M., Ma, Y., Li, W., & Shi, Z. (2020). Significant changes in chemistry of fine particles in wintertime Beijing from 2007 to 2017: impact of clean air actions. Environmental Science and Technology, 54(3), 1344-1352. https://doi.org/10.1021/acs.est.9b04678

Vancouver

Author

Zhang, Yangmei ; VU, Van Tuan ; Sun, Junying ; He, Jianjun ; Shen, Xiaojing ; Lin, Weili ; Zhang, Xiaoye ; Zhong, Junting ; Gao, Wenkang ; Wang, Yaqiang ; Fu, Tzung May ; Ma, Yaping ; Li, Weijun ; Shi, Zongbo. / Significant changes in chemistry of fine particles in wintertime Beijing from 2007 to 2017 : impact of clean air actions. In: Environmental Science and Technology. 2020 ; Vol. 54, No. 3. pp. 1344-1352.

Bibtex

@article{99390eacfa194ecc9850ef6dfb8b7cee,
title = "Significant changes in chemistry of fine particles in wintertime Beijing from 2007 to 2017: impact of clean air actions",
abstract = "The Beijing government implemented a number of clean air action plans to improve air quality in the last 10 years, which contributed to changes in the concentration of fine particles and their compositions. However, quantifying the impacts of these interventions is challenging as meteorology masks the real changes in observed concentrations. Here, we applied a machine learning technique to decouple the effect of meteorology and evaluate the changes in the chemistry of nonrefractory PM1 (particulate matter less than 1 μm) in winter 2007, 2016, and 2017 as a result of the clean air actions. The observed mass concentrations of PM1 were 74.6, 90.2, and 36.1 μg m–3 in the three winters, while the deweathered concentrations were 74.2, 78.7, and 46.3 μg m–3, respectively. The deweathered concentrations of PM1, organics, sulfate, ammonium, chloride, SO2, NO2, and CO decreased by −38, −46, −59, −24, −51, −89, −16, and −52% in 2017 in comparison to 2007. On the contrary, the deweathered concentration of nitrates increased by 4%. Our results indicate that the clean air actions implemented in 2017 were highly effective in reducing ambient concentrations of SO2, CO, and PM1 organics, sulfate, ammonium, and chloride, but the control of nitrate and PM1 organics remains a major challenge.",
author = "Yangmei Zhang and VU, {Van Tuan} and Junying Sun and Jianjun He and Xiaojing Shen and Weili Lin and Xiaoye Zhang and Junting Zhong and Wenkang Gao and Yaqiang Wang and Fu, {Tzung May} and Yaping Ma and Weijun Li and Zongbo Shi",
year = "2020",
month = feb,
day = "4",
doi = "10.1021/acs.est.9b04678",
language = "English",
volume = "54",
pages = "1344--1352",
journal = "Environmental Science and Technology",
issn = "0013-936X",
publisher = "American Chemical Society",
number = "3",

}

RIS

TY - JOUR

T1 - Significant changes in chemistry of fine particles in wintertime Beijing from 2007 to 2017

T2 - impact of clean air actions

AU - Zhang, Yangmei

AU - VU, Van Tuan

AU - Sun, Junying

AU - He, Jianjun

AU - Shen, Xiaojing

AU - Lin, Weili

AU - Zhang, Xiaoye

AU - Zhong, Junting

AU - Gao, Wenkang

AU - Wang, Yaqiang

AU - Fu, Tzung May

AU - Ma, Yaping

AU - Li, Weijun

AU - Shi, Zongbo

PY - 2020/2/4

Y1 - 2020/2/4

N2 - The Beijing government implemented a number of clean air action plans to improve air quality in the last 10 years, which contributed to changes in the concentration of fine particles and their compositions. However, quantifying the impacts of these interventions is challenging as meteorology masks the real changes in observed concentrations. Here, we applied a machine learning technique to decouple the effect of meteorology and evaluate the changes in the chemistry of nonrefractory PM1 (particulate matter less than 1 μm) in winter 2007, 2016, and 2017 as a result of the clean air actions. The observed mass concentrations of PM1 were 74.6, 90.2, and 36.1 μg m–3 in the three winters, while the deweathered concentrations were 74.2, 78.7, and 46.3 μg m–3, respectively. The deweathered concentrations of PM1, organics, sulfate, ammonium, chloride, SO2, NO2, and CO decreased by −38, −46, −59, −24, −51, −89, −16, and −52% in 2017 in comparison to 2007. On the contrary, the deweathered concentration of nitrates increased by 4%. Our results indicate that the clean air actions implemented in 2017 were highly effective in reducing ambient concentrations of SO2, CO, and PM1 organics, sulfate, ammonium, and chloride, but the control of nitrate and PM1 organics remains a major challenge.

AB - The Beijing government implemented a number of clean air action plans to improve air quality in the last 10 years, which contributed to changes in the concentration of fine particles and their compositions. However, quantifying the impacts of these interventions is challenging as meteorology masks the real changes in observed concentrations. Here, we applied a machine learning technique to decouple the effect of meteorology and evaluate the changes in the chemistry of nonrefractory PM1 (particulate matter less than 1 μm) in winter 2007, 2016, and 2017 as a result of the clean air actions. The observed mass concentrations of PM1 were 74.6, 90.2, and 36.1 μg m–3 in the three winters, while the deweathered concentrations were 74.2, 78.7, and 46.3 μg m–3, respectively. The deweathered concentrations of PM1, organics, sulfate, ammonium, chloride, SO2, NO2, and CO decreased by −38, −46, −59, −24, −51, −89, −16, and −52% in 2017 in comparison to 2007. On the contrary, the deweathered concentration of nitrates increased by 4%. Our results indicate that the clean air actions implemented in 2017 were highly effective in reducing ambient concentrations of SO2, CO, and PM1 organics, sulfate, ammonium, and chloride, but the control of nitrate and PM1 organics remains a major challenge.

UR - http://www.scopus.com/inward/record.url?scp=85078743501&partnerID=8YFLogxK

U2 - 10.1021/acs.est.9b04678

DO - 10.1021/acs.est.9b04678

M3 - Article

C2 - 31766848

VL - 54

SP - 1344

EP - 1352

JO - Environmental Science and Technology

JF - Environmental Science and Technology

SN - 0013-936X

IS - 3

ER -