搜索结果: 1-15 共查到“知识库 大气科学 PM2.5”相关记录22条 . 查询时间(0.118 秒)
ESTIMATING PM2.5 IN XI’AN , CHINA USING AEROSOL OPTICAL DEPTH OF NPP VIIRS DATA AND METEOROLOGICAL MEASUREMENTS
Aerosol optical depth PM2.5 VIIRS Remote sensing inversion Nonlinear model
2018/5/16
In recent years, the air pollution is becoming more and more serious, which not only causes the decrease of the visibility, but also affects the human health. As the most important pollutant particula...
为研究渭南市区2014 — 2016年的冬春季雾霾天气的特点，选取覆盖渭南市区的4个监测站点，分析渭南市区PM10和PM2.5污染时间分布特征；同时选取日平均气温、相对湿度、风等气象因素，用线性回归分析法分析各个气象因素同大气中PM10和PM2.5的相互关系。研究发现：三年来冬季PM10和PM2.5的日变化的峰值主要出现在12月— 次年1月； 春季PM10和PM...
青岛大气中HNO3、HNO2、NH3及PM2.5中氮组分的浓度特征和气-粒平衡关系
硝酸气体 亚硝酸气体 氨气
2014/12/20
研究PM2.5中NO3-、NO2-、NH4+及其气态前体物HNO3、HNO2、NH3的浓度特征和气-粒平衡关系,对深入认识PM2.5的来源及控制因素具有重要意义.因此,本文利用2012年6—7月在青岛采集的denuder和PM2.5大气样品,分析了其中气态和颗粒态氮组分的浓度.结果发现,青岛大气中HNO3、HNO2和NH3浓度分别为(0.80±0.79) μg·m-3、(0.49±0.59) μg...
中国PM2.5污染现状及其对人体健康的危害
大气污染 PM2.5 健康 肺癌
2014/10/10
当前，中国大气中PM2.5污染形势严峻。2013 年，在全国纳入监测范围的74 座城市中，接近92%的城市的PM2.5年均浓度未达到国家标准，其中，京津冀、长三角和珠三角等重点区域PM2.5污染尤为严重。PM2.5中含有的多种有毒有害物质可直接危害公众身体健康。已有的研究结果显示，PM2.5污染会直接影响人体的呼吸系统、心血管系统，与肺癌的发生率和死亡率密切相关，但需从PM2.5毒理学及暴露-反应...
为了解上海市大气环境中PM2.5及其重金属的污染特征和健康风险，于2012年5~10月对上海市普陀区（PT）、闵行区（MH）和崇明岛（CM）大气颗粒物PM2.5及其重金属（Cd、Cr、Cu、Pb、Zn）含量进行了监测.结果显示，PM2.5质量浓度介于13.66~143.52 μg·m-3之间，其中，普陀和闵行大气中PM2.5的含量高于崇明岛，且于5月、9月和10月超出国家空气质量二级标准（24 h...
2012年7月，对黄石市城区夏季昼间大气颗粒物PM10与PM2.5样品进行采集，并用热/光反射法（TOR）分析其中的有机碳（OC）、元素碳（EC）.结果显示，新老城区PM10中OC平均含量分别为14.60 μg·m-3和18.70 μg·m-3，EC平均含量分别为4.70 μg·m-3和11.02 μg·m-3；PM2.5中OC平均含量分别为11.89 μg·m-3和13.66 μg·m-3，EC...
Air pollution studies in terms of PM2.5, PM2.5-10, PM10, lead and black carbon in urban areas of Antananarivo - Madagascar
Air pollution studies terms of PM2.5 black carbon urban areas of Antananarivo Madagascar Atmospheric and Oceanic Physics
2012/4/20
Atmospheric aerosols or particulate matters are chemically complex and dynamic mixtures of solid and liquid particles. Sources of particulate matters include both natural and anthropogenic processes. ...
Variations in Mass of the PM10, PM2.5 and PM1 during the Monsoon and the Winter at New Delhi
Particulate matters Visibility Washout pattern Time-series variations Mean mass scavenging coefficient
2016/3/28
PM10, PM2.5 and PM1 mass concentrations have been measured at Delhi (28°35'N; 77°12'E) during the August to
December 2007. The running mean of PM10, PM2.5 and PM1 data shows large variations. The PM1...
Source apportionment of PM2.5 in Cork Harbour, Ireland using a combination of single particle mass spectrometry and quantitative semi-continuous measurements
Cork Harbour single particle mass spectrometry quantitative semi-continuous measurements
2010/10/21
An aerosol time-of-flight mass spectrometer (ATOFMS) was deployed for the measurement of the size resolved chemical composition of single particles at a site in Cork Harbour, Ireland for three weeks i...
Quantification of PM2.5 organic carbon sampling artifacts in US networks
PM2.5 organic carbon sampling artifacts US networks
2010/8/13
Field blanks (bQF) and backup filters (quartz-fiber behind quartz-fiber filter; QBQ) have been adopted by US long-term air quality monitoring networks to estimate PM2.5 organic carbon (OC) sampling ar...
Characterization of Atmospheric Organic Carbon and Element Carbon of PM2.5 and PM10 at Tianjin, China
PM2.5 PM10 Organic carbon (OC) Elemental carbon (EC) Tianjin.
2016/3/29
Concentrations of organic carbon (OC) and elemental carbon (EC) in atmospheric particles were measured in Tianjin
during January, April, July and October in 2008. The 24-h PM2.5 (particles with aerod...
Influences of Traffic Emissions and Meteorological Conditions on Ambient PM10 and PM2.5 Levels at a Highway Toll Station
PM10 PM2.5 Traffic emission Meteorological condition Highway toll station
2016/3/29
The PM10 and PM2.5 levels at a highway toll station were monitored from October to December 2008. Experimental results
show that hourly average PM10 and PM2.5 levels at the highway toll station were ...
Organic nitrogen in PM2.5 aerosol at a forest site in the Southeast US
Organic nitrogen PM2.5 aerosol forest site Southeast US
2010/3/5
There is growing evidence that organo-nitrogen compounds may constitute a significant fraction of the aerosol nitrogen (N) budget. However, very little is known about the abundance and origin of this ...
Inverse modeling and mapping US air quality influences of inorganic PM2.5 precursor emissions using the adjoint of GEOS-Chem
US air quality influences inorganic PM2.5 precursor emissions GEOS-Chem
2009/8/25
Influences of specific sources of inorganic PM2.5 on peak and ambient aerosol concentrations in the US are evaluated using a combination of inverse modeling and sensitivity analysis. First, sulfate an...