Journal article
China's emission control strategies have suppressed unfavorable influences of climate on wintertime PM2.5 concentrations in Beijing since 2002
Atmospheric chemistry and physics, Vol.20(3), pp.1497-1505
02/01/2020
DOI: 10.5194/acp-20-1497-2020
Abstract
Severe wintertime PM 2.5 pollution in Beijing has been receiving increasing worldwide attention, yet the decadal variations remain relatively unexplored. Combining field measurements and model simulations, we quantified the relative influences of anthropogenic emissions and meteorological conditions on PM 2.5 concentrations in Beijing over the winters of 2002–2016. Between the winters of 2011 and 2016, stringent emission control measures resulted in a 21 % decrease in mean mass concentrations of PM 2.5 in Beijing, with 7 fewer haze days per winter on average. Given the overestimation of PM 2.5 by the model, the effectiveness of stringent emission control measures might have been slightly overstated. With fixed emissions, meteorological conditions over the study period would have led to an increase in haze in Beijing, but the strict emission control measures have suppressed the unfavorable influences of the recent climate. The unfavorable meteorological conditions are attributed to the weakening of the East Asia winter monsoon associated particularly with an increase in pressure associated with the Aleutian Low.
Details
- Title: Subtitle
- China's emission control strategies have suppressed unfavorable influences of climate on wintertime PM2.5 concentrations in Beijing since 2002
- Creators
- Meng Gao - Department of Geography, Hong Kong Baptist University, Hong Kong SAR, ChinaZirui Liu - University of Iowa, ChemistryBo Zheng - Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, 100084, ChinaDongsheng Ji - State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaPeter Sherman - Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, USAShaojie Song - University of Iowa, Industrial and Systems EngineeringJinyuan Xin - State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaCheng Liu - University of Science and Technology of China, Hefei, Anhui, 230026, ChinaYuesi Wang - University of Iowa, Iowa Technology InstituteQiang ZhangJia Xing - Tsinghua UniversityJingkun Jiang - University of Iowa, Psychological and Brain SciencesZifa Wang - University of Iowa, IIHR--Hydroscience and EngineeringGregory R Carmichael - University of Iowa, Civil and Environmental EngineeringMichael B McElroy - John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
- Resource Type
- Journal article
- Publication Details
- Atmospheric chemistry and physics, Vol.20(3), pp.1497-1505
- DOI
- 10.5194/acp-20-1497-2020
- ISSN
- 1680-7316
- eISSN
- 1680-7324
- Publisher
- Copernicus Publications
- Grant note
- DOI: 10.13039/501100003453, name: Natural Science Foundation of Guangdong Province, award: 2019A1515011633; DOI: 10.13039/501100001809, name: National Natural Science Foundation of China, award: NSFC91543202
- Language
- English
- Date published
- 02/01/2020
- Academic Unit
- Civil and Environmental Engineering; Nursing; Chemical and Biochemical Engineering
- Record Identifier
- 9984066338302771
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