搜索结果: 1-12 共查到“大气科学 VOCs”相关记录12条 . 查询时间(0.119 秒)
地球环境研究所揭示挥发性有机物（VOCs）跨秦岭传输加剧区域臭氧污染观测证据（图）
有机物 臭氧污染 气候
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2024/1/18
我国南北方经济、人口存在显著差异，气团跨区域传输会导致南北方人为活动/自然过程排放臭氧（O3）前体物（如VOCs等）的相互作用，使臭氧污染呈现区域性分布特征。受大气VOCs排放、迁移传输机制的认识局限，我国的臭氧污染控制政策与措施仍不充分。秦岭作为我国南北气候的重要分界线，在表征气候带分布及气团区域输送路径与强度等方面均具有典型性和代表性。为深入理解VOCs跨区域传输的驱动机制，中国科学院地球环境...
昆明中心城区夏秋季大气VOCs的污染特征及来源解析
VOCs 高原城市 臭氧生成潜势(OFP) 污染来源解析
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2018/3/23
2014年7月和10月,在昆明市中心城区东风广场采样点用苏玛罐采集了大气VOCs样品,并且利用气相色谱-质谱联用仪(GC-MS)对大气中57种VOCs进行分析.结果表明:昆明夏季和秋季大气中VOCs的日平均质量浓度分别为(14.95±3.91)μg/m3和(45.48±6.26)μg/m3,夏季各类VOCs对臭氧生成潜势(OFP)的贡献率表现为:烷烃>烯烃>芳香烃,秋季各类VOCs对总OFP的贡献...
济南市区大气中VOCs的浓度、来源及健康风险评价
VOCs 来源解析 健康风险评价
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2019/4/18
分析2010—2016年济南市区大气VOCs的浓度、组成特征、来源及健康风险。结果表明，2010、2011、2015和2016这4年总VOCs的平均浓度水平相当，2012—2014年总VOCs浓度较上述4年偏低。每年烷烃、烯烃和芳香烃的组分特征存在较大差异。利用主因子分析法对VOCs的来源进行探讨，结果表明所研究的7年间济南市大气VOCs的主要来源种类一致，都是机动车尾气、工业排放、涂料溶剂使用和...
GOME-2 observations of oxygenated VOCs: what can we learn from the ratio glyoxal to formaldehyde on a global scale?
GOME-2 oxygenated VOCs the ratio glyoxal a global scale
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2010/11/3
Collocated data sets of glyoxal (CHO.CHO) and formaldehyde (HCHO) were retrieved for the first time from measurements of the Global Ozone Monitoring Experiment-2 (GOME-2) during the first two years of...
Vehicular emission of volatile organic compounds (VOCs) from a tunnel study in Hong Kong
Vehicular emission volatile organic compounds VOCs tunnel study Hong Kong
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2009/10/9
Vehicle emissions of volatile organic compounds (VOCs) were determined at the Shing Mun Tunnel, Hong Kong in summer and winter of 2003. One hundred and ten VOCs were quantified in this study. The aver...
Characterization of volatile organic compounds (VOCs) in Asian and north American pollution plumes during INTEX-B: identification of specific Chinese air mass tracers
volatile organic compounds VOCs Asian and north American pollution plumes INTEX-B specific Chinese air mass tracers
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2009/8/7
We present results from the Intercontinental Chemical Transport Experiment – Phase B (INTEX-B) aircraft mission conducted in spring 2006. By analyzing the mixing ratios of volatile organic compounds (...
Secondary organic aerosol from biogenic VOCs over West Africa during AMMA
Secondary organic aerosol biogenic VOCs West Africa AMMA
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2009/6/16
This paper presents measurements of organic aerosols above subtropical West Africa during the wet season using data from the UK Facility for Airborne Atmospheric Measurements (FAAM) aircraft. Measurem...
Distribution of VOCs between air and snow at the Jungfraujoch high alpine research station, Switzerland, during CLACE 5（winter 2006）
VOCs air snow Jungfraujoch high alpine research station
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2009/6/2
Volatile organic compounds (VOCs) were analyzed in air and snow samples at the Jungfraujoch high alpine research station in Switzerland as part of CLACE 5 (CLoud and Aerosol Characterization Experimen...
A box model study on photochemical interactions between VOCs and reactive halogen species in the marine boundary layer
photochemical interactions VOCs reactive halogen species marine boundary layer
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2009/3/6
A new chemical scheme is developed for the multiphase photochemical box model SEAMAC (size-SEgregated Aerosol model for Marine Air Chemistry) to investigate photochemical interactions between volatile...
Eddy covariance flux measurements of biogenic VOCs during ECHO 2003 using proton transfer reaction mass spectrometry
Eddy covariance flux measurements biogenic VOCs proton transfer reaction mass spectrometry
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2009/2/6
Within the framework of the AFO 2000 project ECHO, two PTR-MS instruments were operated in combination with sonic anemometers to determine biogenic VOC fluxes from a mixed deciduous forest site in Nor...
The bi-directional exchange of oxygenated VOCs between a loblolly pine (Pinus taeda) plantation and the atmosphere
bi-directional exchange oxygenated VOCs loblolly pine plantation atmosphere
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2009/1/14
Using new in-situ field observations of the most abundant oxygenated VOCs (methanol, acetaldehyde, acetone, C3/C4 carbonyls, MVK+MAC and acetic acid) we were able to constrain emission and deposition ...
Vertical distribution of ozone and VOCs in the low boundary layer of Mexico City
ozone VOCs low boundary layer Mexico City
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2008/11/11
The evolution of ozone (O3) and 13 volatile organic compounds (VOCs) in the boundary layer of Mexico City was investigated during 2000–2004 to improve our understanding of the complex interactions bet...