Reconstructing 1-km-resolution high-quality PM2.5 data records from 2000 to 2018 in China: spatiotemporal variations and policy implications

Wei, Jing; Li, Zhanqing; Lyapustin, Alexei; Sun, Lin; Peng, Yiran; Xue, Wenhao; Su, Tianning; Cribb, Maureen

doi:10.1016/j.rse.2020.112136

Cited by 561 publications

(259 citation statements)

References 83 publications

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“…Meanwhile, there is a high proportion of dust aerosols in the Antarctic except in winter. It is also found that polluted continental/smoke aerosol in the Southern Hemisphere in winter and spring has a relatively large proportion, consistent with previous findings that there is more equivalent back carbon concentrations in spring and winter than in summer and autumn (Bodhaine, 1995;Weller et al, 2013). Compared with the Antarctic and Arctic regions, the types of aerosols in the TP are relatively simple, which are mainly the dust aerosol and polluted-dust aerosol.…”

Section: Horizontal Distributionsupporting

confidence: 88%

“…As an important component, atmospheric aerosols play a crucial role in the Earth-atmosphere system (Garrett and Zhao, 2006;Ghan and Easter, 2006;Nabat et al, 2015;Wei et al, 2021;Xue et al, 2020). Aerosols have a variety of effects on Earth's climate, including the significant direct effect (Rap et al, 2013;Xing et al, 2017), indirect effect (Albrecht, 1989;Liu et al, 2019Liu et al, , 2020aRighi et al, 2011;Twomey, 1977;Zhao and Garrett, 2015) and semi-direct effect (Amiri-Farahani et al, 2017;Johnson, 2005;Koren et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Aerosol characteristics at the three poles of the Earth as characterized by Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations

et al. 2021

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Abstract. To better understand the aerosol properties over the Arctic, Antarctic and Tibetan Plateau (TP), the aerosol optical properties were investigated using 13 years of CALIPSO (Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations) L3 data, and the back trajectories for air masses were also simulated using the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model. The results show that the aerosol optical depth (AOD) has obvious spatial- and seasonal-variation characteristics, and the aerosol loading over Eurasia, Ross Sea and South Asia is relatively large. The annual-average AODs over the Arctic, Antarctic and TP are 0.046, 0.024 and 0.098, respectively. Seasonally, the AOD values are larger from late autumn to early spring in the Arctic, in winter and spring in the Antarctic, and in spring and summer over the TP. There are no significant temporal trends of AOD anomalies in the three study regions. Clean marine and dust-related aerosols are the dominant types over ocean and land, respectively, in both the Arctic and Antarctic, while dust-related aerosol types have greater occurrence frequency (OF) over the TP. The OF of dust-related and elevated smoke is large for a broad range of heights, indicating that they are likely transported aerosols, while other types of aerosols mainly occurred at heights below 2 km in the Antarctic and Arctic. The maximum OF of dust-related aerosols mainly occurs at 6 km altitude over the TP. The analysis of back trajectories of the air masses shows large differences among different regions and seasons. The Arctic region is more vulnerable to mid-latitude pollutants than the Antarctic region, especially in winter and spring, while the air masses in the TP are mainly from the Iranian Plateau, Tarim Basin and South Asia.

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Section: Horizontal Distributionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Aerosol characteristics at the three poles of the Earth as characterized by Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations

et al. 2021

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“…The CERN data that support the findings of this study are available through Liu et al (2017). The PM 2.5 data are available through Wei et al (2020Wei et al ( , 2021.…”

Section: Data Availability Statementmentioning

confidence: 51%

Surface Brightening in Eastern and Central China Since the Implementation of the Clean Air Action in 2013: Causes and Implications

Shi

Zhao

Xia

et al. 2021

Geophysical Research Letters

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Surface brightening has been observed in China since 2005. However, it remains unclear whether the brightening has accelerated recently in response to the strictest ever air pollution control policies since 2013. By combining intensive surface and satellite observations, we find an unprecedented rapid increasing trend in surface solar radiation (SSR) of 0.70–1.16 W m−2 yr−1 over the eastern and central China for 2014–2019. Using a novel method to identify the relative contributions of aerosol and cloud radiative effects to the SSR trends, we find that the strongly declining aerosol radiative effect due to the strict air pollution controls is the main cause of the upward SSR trends; cloud variations should not be the main reason. Distinction exists in seasonal trends of SSR, with decreasing trends in winter and increasing trends in other seasons. Air pollution controls play an important role in regulating SSR, which has valuable implications for photovoltaic power generation.

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“…Meanwhile, fine particles (PM 2.5 ) are primary pollutants of substantial public concern in urban cities (Wei et al, 2019;Wei et al, 2021b). Through wet precipitation, rainwater scavenges air pollutants from the air (Niu et al, 2014;Rao et al, 2016;Wei et al, 2020;Wei et al, 2021a). Thus, the chemical composition of rainwater can serve as a tracer for air pollution (Liu et al, 2013;Niu et al, 2014;Rao et al, 2015;Zheng et al, 2020) and monitors the impact of natural and anthropogenic sources on rainwater (Akpo et al, 2015).…”

Section: Recent-past Reviewmentioning

confidence: 99%

A critical review of the variation in rainwater acidity in 24 Chinese cities during 1982–2018

Han

2021

Elementa: Science of the Anthropocene

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Rainwater is an essential pathway to remove fine particulate matter and dissolved atmospheric pollutants (e.g., SO2, HNO3, and NH3). Acid rain (pH < 5.6) has been a severe environmental issue in China since the 1970s, adversely impacting ecosystem health. This study focuses on the influence of anthropogenically induced anions (SO42– and NO3–) and alkaline cations (Ca2+ and NH4+) on acid rain in Chinese cities. In this review, cities with high population density east of the Hu Huanyong Line that divides China geographically according to its uneven economic development were studied. Coastal and central areas of China to the east of the line are characterized by a much faster developing economy and rapid urbanization. The observed trends and spatial variability of acidity and chemical composition in rainwater are discussed in relation to industrialization and environmental changes in China. Over the past 3½ decades, the precipitation pH in the urban regions has exhibited reduced acidity. A mixed nitric–sulfuric acid rain type has become prominent due to the significant decrease in SO42– via desulfurization. Ca2+ levels have decreased, while NH4+ has increased slightly due to more vehicular transportation. In addition, the neutralization capacity of Ca2+ and NH4+ has decreased from north to south. Overall, the acid rain problem in Chinese cities has been alleviated in recent years.

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Reconstructing 1-km-resolution high-quality PM2.5 data records from 2000 to 2018 in China: spatiotemporal variations and policy implications

Cited by 561 publications

References 83 publications

Aerosol characteristics at the three poles of the Earth as characterized by Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations

Aerosol characteristics at the three poles of the Earth as characterized by Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations

Surface Brightening in Eastern and Central China Since the Implementation of the Clean Air Action in 2013: Causes and Implications

A critical review of the variation in rainwater acidity in 24 Chinese cities during 1982–2018

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