Short- and long-term impacts of the COVID-19 epidemic on urban PM2.5 variations: Evidence from a megacity, Chengdu [0.03%]
COVID-19疫情对城市PM2.5变化的短期和长期影响：来自超级大城市成都的证据
Qian Jin,Yina Luo,Xiangrui Meng et al.
Qian Jin et al.
As the new coronavirus pandemic enters its third year, its long-term impact on the urban environment cannot be ignored, especially in megacities with more than millions of people. Here, we analyzed the changes in the concentration levels, e...
Impact of COVID-19 restrictions on the dry deposition fraction of settleable particulate matter at three industrial urban/suburban locations in northern Spain [0.03%]
COVID-19限制措施对西班牙北部三个工业城/郊区的可沉降颗粒物干沉积分数的影响
Rosa Lara,Laura Megido,Luis Negral et al.
Rosa Lara et al.
Ninety 24-h samples of the dry deposition fraction of settleable particulate matter (DSPM) were collected at one suburban industrial site ('EMA') and two urban industrial sites ('Lauredal' and 'Laboratory') in the western area of Gijón (No...
Reducing Power Sector Emissions under the 1990 Clean Air Act Amendments: A Retrospective on 30 Years of Program Development and Implementation [0.03%]
《洁净空气法》修正案通过三十年来减少电力行业排放的项目发展与实施回顾
Melanie D LaCount,Richard A Haeuber,Taylor R Macy et al.
Melanie D LaCount et al.
Mei W Tessum,Susan C Anenberg,Zoe A Chafe et al.
Mei W Tessum et al.
To improve air quality, knowledge of the sources and locations of air pollutant emissions is critical. However, for many global cities, no previous estimates exist of how much exposure to fine particulate matter (PM2.5), the largest environ...
NO2 retrievals from NOAA-20 OMPS: Algorithm, evaluation, and observations of drastic changes during COVID-19 [0.03%]
COVID-19疫情期间NOAA-20 OMPS探测到的NO2：算法、评估及急剧变化分析
Xinzhou Huang,Kai Yang,Shobha Kondragunta et al.
Xinzhou Huang et al.
We present the first NO2 measurements from the Nadir Mapper of Ozone Mapping and Profiler Suite (OMPS) instrument aboard the NOAA-20 satellite. NOAA-20 OMPS was launched in November 2017, with a nadir resolution of 17 × 13 km2 similar to t...
Impact of the 2020 COVID-19 lockdown on NO2 and PM10 concentrations in Berlin, Germany [0.03%]
德国柏林2020年COVID-19封锁对NO2和PM10浓度的影响
Mona Schatke,Fred Meier,Boris Schröder et al.
Mona Schatke et al.
In March 2020, the World Health Organization declared a pandemic due to the rapid and worldwide spread of the SARS-CoV-2 virus. To prevent spread of the infection social contact restrictions were enacted worldwide, which suggest a significa...
Hourly organic tracers-based source apportionment of PM2.5 before and during the Covid-19 lockdown in suburban Shanghai, China: Insights into regional transport influences and response to urban emission reductions [0.03%]
基于有机示踪剂的上海郊区新冠肺炎疫情前后PM2.5逐时来源解析及区域传输和本地减排响应分析
Shan Wang,Qiongqiong Wang,Shuhui Zhu et al.
Shan Wang et al.
During the Covid-19 outbreak, strict lockdown measures led to notable reductions in transportation-related emissions and significantly altered atmospheric pollution characteristics in urban and suburban areas. In this work, we compare compr...
Effect of combustion particle morphology on biological responses in a Co-culture of human lung and macrophage cells [0.03%]
燃烧颗粒物形貌对其与人体肺细胞及巨噬细胞共培养生物效应的影响
Kamaljeet Kaur,Raziye Mohammadpour,Hamidreza Ghandehari et al.
Kamaljeet Kaur et al.
Atmospheric aging of combustion particles alters their chemical composition and morphology. Previous studies have reported differences in toxicological responses after exposure to fresh versus aged particles, with chemical composition being...
Changes in physical and chemical properties of urban atmospheric aerosols and ozone during the COVID-19 lockdown in a semi-arid region [0.03%]
疫情期间半干旱地区城市大气气溶胶和臭氧的物理化学特性变化
Yi Chang,Tao Du,Xin Song et al.
Yi Chang et al.
The synergistic response of urban atmospheric aerosols and ozone (O3) to reduction of anthropogenic emissions is complicated and still needs further study. Thus, the changes in physical and chemical properties of urban atmospheric aerosols ...
Application of an Improved Gas-constrained Source Apportionment Method Using Data Fused Fields: a Case Study in North Carolina, USA [0.03%]
一种改进的气相限源解析方法及其在融合数据场中的应用——以美国北卡罗来纳州为例
Ran Huang,Zongrun Li,Cesunica E Ivey et al.
Ran Huang et al.
A number of studies have found differing associations of disease outcomes with PM2.5 components (or species) and sources (e.g., biomass burning, diesel vehicles and gasoline vehicles). Here, a unique method of fusing daily chemical transpor...