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Atmospheric Environment
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Papers 23276
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Abstract The rectifier effect refers to the exchange of CO2 near the boundary layer of the atmosphere. This effect is an important part of the carbon cycle because it affects the vertical distribution of CO2 and indirectly affects global CO2 distribution. However, the intensity of this effect is difficult to measure directly. A differential absorption LiDAR (DIAL) system can observe the rectifier effect because this device can accurately measure planetary boundary layer height (PBLH) and CO2 pro...
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#1Yu Yan (Huaqiao University)H-Index: 2
#2Quan Zheng (Huaqiao University)H-Index: 2
Last.Yan YanH-Index: 1
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Abstract The chemical profiles of PM2.5 aerosols and PM2.5 fugitive dusts have been widely investigated in many cities; however, the characteristics and provenance implications of rare earth elements (REEs) and Sr–Nd isotopes have seldom been reported for PM2.5 aerosols and PM2.5 fugitive dusts. In this study, PM2.5 aerosol and PM2.5 fugitive (road, construction, and soil) dust samples were collected in Nanchang city, China, and analyzed for the characteristics and provenance implications via RE...
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#1Jessica Tryner (CSU: Colorado State University)H-Index: 4
#2Christian L'Orange (CSU: Colorado State University)H-Index: 8
Last.John Volckens (CSU: Colorado State University)H-Index: 25
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Abstract Low-cost aerosol monitors can provide more spatially- and temporally-resolved data on ambient fine particulate matter (PM2.5) concentrations than are available from regulatory monitoring networks; however, concentrations reported by low-cost monitors are sometimes inaccurate. We investigated laboratory- and field-based approaches for calibrating low-cost PurpleAir monitors. First, we investigated the linearity of the PurpleAir response to NIST Urban PM and derived a laboratory-based gra...
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Abstract The model WRF-Chem sensitivity simulation experiments with changing intensity of anthropogenic emissions sources were applied to simulate a rainstorm process in the Yangtze River Middle Reaches (YRMR) during June 18–19, 2018 to study the responses of clouds and precipitation in the rainstorm to changes in aerosol concentrations in this region. The simulation experiments revealed that the aerosol-cloud interaction during low and high emission phases tended to inhibit and to enhance the p...
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Abstract Although zinc is ubiquitous in ambient particulate matter (PM), exposure to size fractionated residual oil fly ash (ROFA) PM is of particular concern due to several studies implicating particle zinc in mortality, adverse respiratory and cardiac effects. The lack of zinc speciation data is an impediment to our understanding of the biological mechanism of Zn induced toxicity. ROFA PM2.5+ samples (i.e. particle with aerodynamic diameter >2.5 μm) are prepared in a small 732 kW practical fir...
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#1Lei Li (SYSU: Sun Yat-sen University)H-Index: 2
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Abstract The vertical structure characteristics of the concentrations of PM2.5, O3 and NOx are analyzed in conjunction with the meteorological data collected in December 2017 from a new meteorology tower in the Pearl River Delta region. The results show that: (1) The concentration of PM2.5 generally decreased with height, while the magnitude of the decrease differed between the polluted and the clean situations. The concentration of O3 increased with height, and it increased more drastically dur...
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#1Joel C. Corbin (National Research Council)H-Index: 3
#2Weihan Peng (UCR: University of California, Riverside)H-Index: 1
Last.Stéphanie Gagné (National Research Council)H-Index: 2
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Abstract Liquefied natural gas (LNG) is becoming increasingly popular as a marine fuel as emission regulations become more stringent. However, very little data are available on the particulate matter emissions of modern marine natural gas engines. In this study, we present a first detailed characterization of the composition of the particulate matter emitted by a modern, in-use, natural-gas-powered vessel. The vessel engines use compression-ignition and only a small amount of diesel fuel as pilo...
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Abstract As interest in using low-cost sensors continues to grow among members of the public, robust evaluations of commercially available sensors are necessary. Information gained from independent evaluations can help ensure that the sensors selected by individuals or communities meet both user needs and their abilities. Appropriate sensor selection has the potential to ensure the collection of useful and informative data. The AQ-SPEC (Air Quality Sensor Performance Evaluation Center) program a...
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#1Xingchuan Yang (BNU: Beijing Normal University)
#2Chuanfeng Zhao (BNU: Beijing Normal University)H-Index: 14
Last.Xing Yan (BNU: Beijing Normal University)H-Index: 7
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Abstract Himawari-8 aerosol products are useful for forecasting weather, environmental monitoring, and climate change research. In 2018, after receiving much attention from researchers, the Himawari-8 Level2 (L2) aerosol retrieval algorithm was updated from Version 1.0 (V1.0) to Version 2.1 (V2.1). Although previous studies have examined the accuracy of Himawari-8 aerosol products, only a few studies have evaluated and compared the V1.0 and V2.1 algorithms or described how the Himawari-8 aerosol...
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#1Xi Chen (SYSU: Sun Yat-sen University)H-Index: 2
#2Buqing Zhong (JNU: Jinan University)
Last.Min Shao (JNU: Jinan University)H-Index: 3
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Abstract Southern China has experienced severe photochemical pollution events in recent years, and the tropospheric ozone has emerged as the major pollutant of concern. Despite some recent efforts, the role of natural factors in constraining long-term trends of ozone in this region is poorly understood. In this study, we addressed this issue using tropospheric column ozone (TCO) datasets (2005–2017) from the Ozone Monitoring Instrument/Microwave Limb Sounder (OMI/MLS) and surface ozone datasets ...
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