Severe haze in northern China: A synergy of anthropogenic emissions and atmospheric processes.
Zhisheng An,Ru-Jin Huang,Renyi Zhang,Xuexi Tie,Guohui Li,Guohui Li,Junji Cao,Junji Cao,Weijian Zhou,Weijian Zhou,Zhengguo Shi,Zhengguo Shi,Yongming Han,Yongming Han,Zhaolin Gu,Yuemeng Ji,Yuemeng Ji +16 more
TLDR
It is highlighted that improved understanding of the emission sources, physical/chemical processes during haze evolution, and interactions with meteorological/climatic changes are necessary to unravel the causes, mechanisms, and trends for haze pollution.Abstract:
Regional severe haze represents an enormous environmental problem in China, influencing air quality, human health, ecosystem, weather, and climate. These extremes are characterized by exceedingly high concentrations of fine particulate matter (smaller than 2.5 µm, or PM2.5) and occur with extensive temporal (on a daily, weekly, to monthly timescale) and spatial (over a million square kilometers) coverage. Although significant advances have been made in field measurements, model simulations, and laboratory experiments for fine PM over recent years, the causes for severe haze formation have not yet to be systematically/comprehensively evaluated. This review provides a synthetic synopsis of recent advances in understanding the fundamental mechanisms of severe haze formation in northern China, focusing on emission sources, chemical formation and transformation, and meteorological and climatic conditions. In particular, we highlight the synergetic effects from the interactions between anthropogenic emissions and atmospheric processes. Current challenges and future research directions to improve the understanding of severe haze pollution as well as plausible regulatory implications on a scientific basis are also discussed.read more
Citations
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Identifying airborne transmission as the dominant route for the spread of COVID-19.
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Contrasting trends of PM2.5 and surface-ozone concentrations in China from 2013 to 2017
Yonghong Wang,Yonghong Wang,Wenkang Gao,Shuai Wang,Tao Song,Zhengyu Gong,Dongsheng Ji,Lili Wang,Lili Wang,Zirui Liu,Guiqian Tang,Yanfeng Huo,Shili Tian,Jiayun Li,Mingge Li,Yuan Yang,Biwu Chu,Biwu Chu,Tuukka Petäjä,Veli-Matti Kerminen,Hong He,Jiming Hao,Markku Kulmala,Yuesi Wang,Yuanhang Zhang +24 more
TL;DR: It is demonstrated that the Chinese government was successful in the reduction of particulate matter in urban areas from 2013 to 2017, although the ozone concentration has increased significantly, suggesting a more complex mechanism of improving Chinese air quality in the future.
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East Asian Study of Tropospheric Aerosols and their Impact on Regional Clouds, Precipitation, and Climate (EAST-AIRCPC)
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TL;DR: In this paper, a comprehensive review of cloud-aerosol-precipitation interactions (CAPI) is presented, focusing on the observations of aerosol loading and properties, relationships between aerosols and meteorological variables affecting CAPI, and quantification of CAPI and their impact on climate.
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Puzzling haze events in China during the coronavirus (COVID-19) shutdown.
Yunhua Chang,Ru-Jin Huang,Xinlei Ge,Xiangpeng Huang,Jianlin Hu,Yusen Duan,Zhong Zou,Xuejun Liu,Moritz F. Lehmann +8 more
TL;DR: During NYH‐20, PM2.5 levels correlated significantly with the oxidation ratio of nitrogen, and aged particles from northern China were found to impede atmospheric new particle formation and growth in Shanghai.
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