The Experts below are selected from a list of 312432 Experts worldwide ranked by ideXlab platform

Guoshun Zhuang - One of the best experts on this subject based on the ideXlab platform.

  • the air borne particulate pollution in beijing Concentration Composition distribution and sources
    Atmospheric Environment, 2004
    Co-Authors: Guoshun Zhuang, Ying Wang, Wenjie Zhang, Zifa Wang
    Abstract:

    Aerosol samples of PM2.5 and PM10 were collected in both summer and winter seasons from 2002 to 2003 synchronously at a traffic site, an industrial site, and a residential site in Beijing, which could basically be the representatives over Beijing. Twenty-three elements and 15 ions together with organic carbon and elemental carbon were analyzed systematically for characterization of Beijing aerosol. PM2.5 was the major part of the inhalable particles (PM10), as the ratios of PM2.5/PM10 were 0.45–0.48 in summer and 0.52–0.73 in winter. SO42−, NO3−, NH4+, organic matter, crustal matter, and element carbon were the six dominant species, which totally accounted for 85.8–97.7% of PM2.5. Secondary aerosol (SO42−, NO3−, and NH4+), road dust or/and long-range transported dust from outside Beijing, industry and motor vehicles emission, coal burning were the major contributors to the air-borne particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus the dust from the long-range transport, could be the major sources of the aerosol pollution at Beijing. A relatively even spatial distribution of chemical species in PM2.5 was found while in PM10 a significant variation with the highest Concentrations at the industrial site in summer and at the residential site in winter was observed. The Concentrations of PM10, PM2.5 as well as various chemical species were higher in winter than in summer. The contributions of mineral aerosol from outside Beijing were first estimated with a newly developed element tracer technique, which accounted for 79% and 37% of the total mineral in PM10 and PM2.5 in winter, and 19% and 20% in summer, respectively. During the dust storm period from 20 to 22 March, it reached up to 97% in TSP, 79% in PM10 and 76% in PM2.5. This is the technique, firstly, developed for estimating the relative contributions of sources from inside and outside Beijing to the total mineral aerosol and it could provide the basic information in controlling the air-borne particulate pollution at Beijing.

  • the air borne particulate pollution in beijing Concentration Composition distribution and sources
    Atmospheric Environment, 2004
    Co-Authors: Guoshun Zhuang, Ying Wang, Yele Sun, Lihui Han, Jinghua Guo, Mo Dan, Wenjie Zhang
    Abstract:

    Aerosol samples of PM2.5 and PM10 were collected in both summer and winter seasons from 2002 to 2003 synchronously at a traffic site, an industrial site, and a residential site in Beijing, which could basically be the representatives over Beijing. Twenty-three elements and 15 ions together with organic carbon and elemental carbon were analyzed systematically for characterization of Beijing aerosol. PM2.5 was the major part of the inhalable particles (PM10), as the ratios of PM2.5/PM10 were 0.45-0.48 in summer and 0.52-0.73 in winter. SO42-, NO3-, NH4+, organic matter, crustal matter, and element carbon were the six dominant species, which totally accounted for 85.8-97.7% of Secondary aerosol, (SO42-, NO3-, and NH4+), road dust or/and long-range transported dust from outside Beijing, industry and motor vehicles emission, coal burning were the major contributors to the air-borne particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus the dust from the long-range transport, could be the major sources of the aerosol pollution at Beijing. A relatively even spatial distribution of chemical species in PM2.5 was found while in PM10 a significant variation with the highest Concentrations at the industrial site in summer and at the residential site in winter was observed. The Concentrations of PM10, PM2.5 as well as various chemical species were higher in winter than in summer. The contributions of mineral aerosol from outside Beijing were first estimated with a newly developed element tracer technique, which accounted for 79% and 37% of the total mineral in PM10 and PM2.5 in winter, and 19% and 20% in summer, respectively. During the dust storm period from 20 to 22 March, it reached up to 97% in TSP, 79% in PM10 and 76% in PM2.5. This is the technique, firstly, developed for estimating the relative contributions of sources from inside and outside Beijing to the total mineral aerosol and it could provide the basic information in controlling the air-borne particulate pollution at Beijing. (C) 2004 Elsevier Ltd. All rights reserved.

Yele Sun - One of the best experts on this subject based on the ideXlab platform.

  • influences of upwind emission sources and atmospheric processing on aerosol chemistry and properties at a rural location in the northeastern u s
    Journal of Geophysical Research, 2016
    Co-Authors: Shan Zhou, Yele Sun, Sonya Collier, Fan Mei, Jian Wang, Yin Nan Lee, Arthur J Sedlacek, Stephen R Springston
    Abstract:

    Continuous real-time measurements of atmospheric aerosol with an Aerodyne high-resolution time-of-flight aerosol mass spectrometer coupled with a fast temperature-stepping thermodenuder were carried out in summer 2011 at Brookhaven National Laboratory (BNL, 40.871°N, 72.89°W) during the Department of Energy Aerosol Life Cycle Intensive Operational Period campaign. BNL was frequently downwind of emissions from the New York metropolitan area and was exposed to various combinations of anthropogenic, biogenic, and marine emissions based on air mass history. The average Concentration of submicrometer aerosol (PM1) during this study was 12.6 µg m−3 with 64% of the mass being organic. Organic aerosol (OA) at BNL was found to be overwhelmingly secondary, consisting of (1) a fresher, semivolatile oxygenated organic aerosol (SV-OOA; oxygen-to-carbon ratio (O/C) = 0.54; 63% of OA mass) that was strongly influenced by transported urban plumes; (2) a regional, more aged, low-volatility OOA (LV-OOA; O/C = 0.97; 29% of OA mass) influenced by aqueous-phase processing; and (3) a nitrogen-enriched OA (NOA; nitrogen-to-carbon ratio (N/C) = 0.185; 8% of OA mass) likely composed of amine salts formed from acid-base reactions in industrial emissions. Urban emissions from the New York metropolitan areas to the W and SW in particular led to elevated PM1 mass Concentration and altered aerosol Composition at BNL. Transported urban plumes and local biogenic emissions likely interacted to enhance secondary organic aerosol production, primarily represented by SV-OOA. These results suggest an important role that urban anthropogenic emissions play in affecting ambient PM Concentration, Composition, and physical-chemical properties at rural areas in the Northeast U.S.

  • the air borne particulate pollution in beijing Concentration Composition distribution and sources
    Atmospheric Environment, 2004
    Co-Authors: Guoshun Zhuang, Ying Wang, Yele Sun, Lihui Han, Jinghua Guo, Mo Dan, Wenjie Zhang
    Abstract:

    Aerosol samples of PM2.5 and PM10 were collected in both summer and winter seasons from 2002 to 2003 synchronously at a traffic site, an industrial site, and a residential site in Beijing, which could basically be the representatives over Beijing. Twenty-three elements and 15 ions together with organic carbon and elemental carbon were analyzed systematically for characterization of Beijing aerosol. PM2.5 was the major part of the inhalable particles (PM10), as the ratios of PM2.5/PM10 were 0.45-0.48 in summer and 0.52-0.73 in winter. SO42-, NO3-, NH4+, organic matter, crustal matter, and element carbon were the six dominant species, which totally accounted for 85.8-97.7% of Secondary aerosol, (SO42-, NO3-, and NH4+), road dust or/and long-range transported dust from outside Beijing, industry and motor vehicles emission, coal burning were the major contributors to the air-borne particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus the dust from the long-range transport, could be the major sources of the aerosol pollution at Beijing. A relatively even spatial distribution of chemical species in PM2.5 was found while in PM10 a significant variation with the highest Concentrations at the industrial site in summer and at the residential site in winter was observed. The Concentrations of PM10, PM2.5 as well as various chemical species were higher in winter than in summer. The contributions of mineral aerosol from outside Beijing were first estimated with a newly developed element tracer technique, which accounted for 79% and 37% of the total mineral in PM10 and PM2.5 in winter, and 19% and 20% in summer, respectively. During the dust storm period from 20 to 22 March, it reached up to 97% in TSP, 79% in PM10 and 76% in PM2.5. This is the technique, firstly, developed for estimating the relative contributions of sources from inside and outside Beijing to the total mineral aerosol and it could provide the basic information in controlling the air-borne particulate pollution at Beijing. (C) 2004 Elsevier Ltd. All rights reserved.

Wenjie Zhang - One of the best experts on this subject based on the ideXlab platform.

  • the air borne particulate pollution in beijing Concentration Composition distribution and sources
    Atmospheric Environment, 2004
    Co-Authors: Guoshun Zhuang, Ying Wang, Wenjie Zhang, Zifa Wang
    Abstract:

    Aerosol samples of PM2.5 and PM10 were collected in both summer and winter seasons from 2002 to 2003 synchronously at a traffic site, an industrial site, and a residential site in Beijing, which could basically be the representatives over Beijing. Twenty-three elements and 15 ions together with organic carbon and elemental carbon were analyzed systematically for characterization of Beijing aerosol. PM2.5 was the major part of the inhalable particles (PM10), as the ratios of PM2.5/PM10 were 0.45–0.48 in summer and 0.52–0.73 in winter. SO42−, NO3−, NH4+, organic matter, crustal matter, and element carbon were the six dominant species, which totally accounted for 85.8–97.7% of PM2.5. Secondary aerosol (SO42−, NO3−, and NH4+), road dust or/and long-range transported dust from outside Beijing, industry and motor vehicles emission, coal burning were the major contributors to the air-borne particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus the dust from the long-range transport, could be the major sources of the aerosol pollution at Beijing. A relatively even spatial distribution of chemical species in PM2.5 was found while in PM10 a significant variation with the highest Concentrations at the industrial site in summer and at the residential site in winter was observed. The Concentrations of PM10, PM2.5 as well as various chemical species were higher in winter than in summer. The contributions of mineral aerosol from outside Beijing were first estimated with a newly developed element tracer technique, which accounted for 79% and 37% of the total mineral in PM10 and PM2.5 in winter, and 19% and 20% in summer, respectively. During the dust storm period from 20 to 22 March, it reached up to 97% in TSP, 79% in PM10 and 76% in PM2.5. This is the technique, firstly, developed for estimating the relative contributions of sources from inside and outside Beijing to the total mineral aerosol and it could provide the basic information in controlling the air-borne particulate pollution at Beijing.

  • the air borne particulate pollution in beijing Concentration Composition distribution and sources
    Atmospheric Environment, 2004
    Co-Authors: Guoshun Zhuang, Ying Wang, Yele Sun, Lihui Han, Jinghua Guo, Mo Dan, Wenjie Zhang
    Abstract:

    Aerosol samples of PM2.5 and PM10 were collected in both summer and winter seasons from 2002 to 2003 synchronously at a traffic site, an industrial site, and a residential site in Beijing, which could basically be the representatives over Beijing. Twenty-three elements and 15 ions together with organic carbon and elemental carbon were analyzed systematically for characterization of Beijing aerosol. PM2.5 was the major part of the inhalable particles (PM10), as the ratios of PM2.5/PM10 were 0.45-0.48 in summer and 0.52-0.73 in winter. SO42-, NO3-, NH4+, organic matter, crustal matter, and element carbon were the six dominant species, which totally accounted for 85.8-97.7% of Secondary aerosol, (SO42-, NO3-, and NH4+), road dust or/and long-range transported dust from outside Beijing, industry and motor vehicles emission, coal burning were the major contributors to the air-borne particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus the dust from the long-range transport, could be the major sources of the aerosol pollution at Beijing. A relatively even spatial distribution of chemical species in PM2.5 was found while in PM10 a significant variation with the highest Concentrations at the industrial site in summer and at the residential site in winter was observed. The Concentrations of PM10, PM2.5 as well as various chemical species were higher in winter than in summer. The contributions of mineral aerosol from outside Beijing were first estimated with a newly developed element tracer technique, which accounted for 79% and 37% of the total mineral in PM10 and PM2.5 in winter, and 19% and 20% in summer, respectively. During the dust storm period from 20 to 22 March, it reached up to 97% in TSP, 79% in PM10 and 76% in PM2.5. This is the technique, firstly, developed for estimating the relative contributions of sources from inside and outside Beijing to the total mineral aerosol and it could provide the basic information in controlling the air-borne particulate pollution at Beijing. (C) 2004 Elsevier Ltd. All rights reserved.

Zifa Wang - One of the best experts on this subject based on the ideXlab platform.

  • the air borne particulate pollution in beijing Concentration Composition distribution and sources
    Atmospheric Environment, 2004
    Co-Authors: Guoshun Zhuang, Ying Wang, Wenjie Zhang, Zifa Wang
    Abstract:

    Aerosol samples of PM2.5 and PM10 were collected in both summer and winter seasons from 2002 to 2003 synchronously at a traffic site, an industrial site, and a residential site in Beijing, which could basically be the representatives over Beijing. Twenty-three elements and 15 ions together with organic carbon and elemental carbon were analyzed systematically for characterization of Beijing aerosol. PM2.5 was the major part of the inhalable particles (PM10), as the ratios of PM2.5/PM10 were 0.45–0.48 in summer and 0.52–0.73 in winter. SO42−, NO3−, NH4+, organic matter, crustal matter, and element carbon were the six dominant species, which totally accounted for 85.8–97.7% of PM2.5. Secondary aerosol (SO42−, NO3−, and NH4+), road dust or/and long-range transported dust from outside Beijing, industry and motor vehicles emission, coal burning were the major contributors to the air-borne particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus the dust from the long-range transport, could be the major sources of the aerosol pollution at Beijing. A relatively even spatial distribution of chemical species in PM2.5 was found while in PM10 a significant variation with the highest Concentrations at the industrial site in summer and at the residential site in winter was observed. The Concentrations of PM10, PM2.5 as well as various chemical species were higher in winter than in summer. The contributions of mineral aerosol from outside Beijing were first estimated with a newly developed element tracer technique, which accounted for 79% and 37% of the total mineral in PM10 and PM2.5 in winter, and 19% and 20% in summer, respectively. During the dust storm period from 20 to 22 March, it reached up to 97% in TSP, 79% in PM10 and 76% in PM2.5. This is the technique, firstly, developed for estimating the relative contributions of sources from inside and outside Beijing to the total mineral aerosol and it could provide the basic information in controlling the air-borne particulate pollution at Beijing.

Ying Wang - One of the best experts on this subject based on the ideXlab platform.

  • the air borne particulate pollution in beijing Concentration Composition distribution and sources
    Atmospheric Environment, 2004
    Co-Authors: Guoshun Zhuang, Ying Wang, Wenjie Zhang, Zifa Wang
    Abstract:

    Aerosol samples of PM2.5 and PM10 were collected in both summer and winter seasons from 2002 to 2003 synchronously at a traffic site, an industrial site, and a residential site in Beijing, which could basically be the representatives over Beijing. Twenty-three elements and 15 ions together with organic carbon and elemental carbon were analyzed systematically for characterization of Beijing aerosol. PM2.5 was the major part of the inhalable particles (PM10), as the ratios of PM2.5/PM10 were 0.45–0.48 in summer and 0.52–0.73 in winter. SO42−, NO3−, NH4+, organic matter, crustal matter, and element carbon were the six dominant species, which totally accounted for 85.8–97.7% of PM2.5. Secondary aerosol (SO42−, NO3−, and NH4+), road dust or/and long-range transported dust from outside Beijing, industry and motor vehicles emission, coal burning were the major contributors to the air-borne particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus the dust from the long-range transport, could be the major sources of the aerosol pollution at Beijing. A relatively even spatial distribution of chemical species in PM2.5 was found while in PM10 a significant variation with the highest Concentrations at the industrial site in summer and at the residential site in winter was observed. The Concentrations of PM10, PM2.5 as well as various chemical species were higher in winter than in summer. The contributions of mineral aerosol from outside Beijing were first estimated with a newly developed element tracer technique, which accounted for 79% and 37% of the total mineral in PM10 and PM2.5 in winter, and 19% and 20% in summer, respectively. During the dust storm period from 20 to 22 March, it reached up to 97% in TSP, 79% in PM10 and 76% in PM2.5. This is the technique, firstly, developed for estimating the relative contributions of sources from inside and outside Beijing to the total mineral aerosol and it could provide the basic information in controlling the air-borne particulate pollution at Beijing.

  • the air borne particulate pollution in beijing Concentration Composition distribution and sources
    Atmospheric Environment, 2004
    Co-Authors: Guoshun Zhuang, Ying Wang, Yele Sun, Lihui Han, Jinghua Guo, Mo Dan, Wenjie Zhang
    Abstract:

    Aerosol samples of PM2.5 and PM10 were collected in both summer and winter seasons from 2002 to 2003 synchronously at a traffic site, an industrial site, and a residential site in Beijing, which could basically be the representatives over Beijing. Twenty-three elements and 15 ions together with organic carbon and elemental carbon were analyzed systematically for characterization of Beijing aerosol. PM2.5 was the major part of the inhalable particles (PM10), as the ratios of PM2.5/PM10 were 0.45-0.48 in summer and 0.52-0.73 in winter. SO42-, NO3-, NH4+, organic matter, crustal matter, and element carbon were the six dominant species, which totally accounted for 85.8-97.7% of Secondary aerosol, (SO42-, NO3-, and NH4+), road dust or/and long-range transported dust from outside Beijing, industry and motor vehicles emission, coal burning were the major contributors to the air-borne particulate pollution in Beijing. Overall, coal burning and the traffic exhausts, plus the dust from the long-range transport, could be the major sources of the aerosol pollution at Beijing. A relatively even spatial distribution of chemical species in PM2.5 was found while in PM10 a significant variation with the highest Concentrations at the industrial site in summer and at the residential site in winter was observed. The Concentrations of PM10, PM2.5 as well as various chemical species were higher in winter than in summer. The contributions of mineral aerosol from outside Beijing were first estimated with a newly developed element tracer technique, which accounted for 79% and 37% of the total mineral in PM10 and PM2.5 in winter, and 19% and 20% in summer, respectively. During the dust storm period from 20 to 22 March, it reached up to 97% in TSP, 79% in PM10 and 76% in PM2.5. This is the technique, firstly, developed for estimating the relative contributions of sources from inside and outside Beijing to the total mineral aerosol and it could provide the basic information in controlling the air-borne particulate pollution at Beijing. (C) 2004 Elsevier Ltd. All rights reserved.