采集北京地区不同空气质量指数下的大气总悬浮颗粒物样品,用γ谱仪对样品中的放射性核素浓度进行分析,并将分析结果与空气TSP、PM_(2.5)和PM_(10)浓度数据进行关联性研究。结果表明,空气总悬浮颗粒物的采样量与空气质量有明显的强相关性...采集北京地区不同空气质量指数下的大气总悬浮颗粒物样品,用γ谱仪对样品中的放射性核素浓度进行分析,并将分析结果与空气TSP、PM_(2.5)和PM_(10)浓度数据进行关联性研究。结果表明,空气总悬浮颗粒物的采样量与空气质量有明显的强相关性,影响采样量的主要是PM_(2.5);空气总悬浮颗粒物样品的放射性水平含量均较低,7Be活度浓度范围在2.18～4.84 m Bq/m3,7Be浓度与TSP、PM_(2.5)、PM_(10)浓度相关性极弱;210Pb活度浓度范围在0.65～3.36 m Bq/m3,210Pb浓度与PM_(2.5)浓度高度正相关;40K活度浓度范围在0.149～0.395 m Bq/m3,40K浓度与粒径大于_(2.5)μm的颗粒物浓度高度正相关;其他核素结果均低于探测限。展开更多
Wind speed,temperature,relative humidity and TSP concentration at three intersections in Binzhou City were monitored,and the relationships of TSP concentration with wind speed,temperature,relative humidity and traffic...Wind speed,temperature,relative humidity and TSP concentration at three intersections in Binzhou City were monitored,and the relationships of TSP concentration with wind speed,temperature,relative humidity and traffic flow at the three intersections in Binzhou City were analyzed by using SPSS.The results show that traffic flow was the main factor affecting TSP concentration of road traffic in Binzhou City.展开更多
The measurement of black carbon （BC） and organic carbon （OC）, dust in total suspended particulates （TSP） was carried out at Yulong Snow Mountain （Mt. Yulong） and Ganhaizi Basin, in the Mt. Yulong region, south...The measurement of black carbon （BC） and organic carbon （OC）, dust in total suspended particulates （TSP） was carried out at Yulong Snow Mountain （Mt. Yulong） and Ganhaizi Basin, in the Mt. Yulong region, southwestern China. TSP samples were analyzed using a thermal/optical reflectance carbon analyzer. Results show that average BC and OC concentrations in TSP in the Mt. Yulong region were 1.61±1.15 μg/m3 and 2.96±1.59 μg/m3, respectively. Statistical results demonstrated that there were significant differences in mean BC and OC contents between Ganhaizi Basin and Mt. Yulong at the 0.05 level. Strong correlations between BC and OC indicate their common dominant emission sources and transport processes. Temporal variations ofBC, OC, and optical attenuation （ATN） values were consistent with each other in carbonaceous aerosols. The ratios of OC/BC in monsoon season were significantly higher than in non-monsoon in aerosols from Ganhaizi, which is closely related to the formation of secondary organic carbon （SOC） and extensive motor vehicle emissions from tourism activities. The temporal variations of BC, OC and ATN in carbonaceous aerosols in Ganhaizi and Mt. Yulong were totally different, probably due to elevation difference and diverse tourism activity intensity between the two sites. Time-averaged aerosol optical depth （AOD） at the wavelength of 550 nm in Mt. Yulong was higher than that of the inland of the Tibetan Plateau （TP）. Source apportionment indicated that intensive exhaust emissions from tourism vehicles were the main local sources of atmospheric pollutant in the Mt. Yulong region. Biomass-burning emissions released from South Asia could penetrate into the inland of the TP under the transport of summer monsoon. Further study is needed to assess light absorption and radiative forcing of carbonaceous aerosols, and modeling research in combination with long-term in-situ observations of light-absorbing particulates （LAPs） in the TP is also urgently needed in future work.展开更多
文摘采集北京地区不同空气质量指数下的大气总悬浮颗粒物样品,用γ谱仪对样品中的放射性核素浓度进行分析,并将分析结果与空气TSP、PM_(2.5)和PM_(10)浓度数据进行关联性研究。结果表明,空气总悬浮颗粒物的采样量与空气质量有明显的强相关性,影响采样量的主要是PM_(2.5);空气总悬浮颗粒物样品的放射性水平含量均较低,7Be活度浓度范围在2.18～4.84 m Bq/m3,7Be浓度与TSP、PM_(2.5)、PM_(10)浓度相关性极弱;210Pb活度浓度范围在0.65～3.36 m Bq/m3,210Pb浓度与PM_(2.5)浓度高度正相关;40K活度浓度范围在0.149～0.395 m Bq/m3,40K浓度与粒径大于_(2.5)μm的颗粒物浓度高度正相关;其他核素结果均低于探测限。
基金Supported by the Science and Technology Development Planning Project of Binzhou City,Shandong Province(2014ZC0331)
文摘Wind speed,temperature,relative humidity and TSP concentration at three intersections in Binzhou City were monitored,and the relationships of TSP concentration with wind speed,temperature,relative humidity and traffic flow at the three intersections in Binzhou City were analyzed by using SPSS.The results show that traffic flow was the main factor affecting TSP concentration of road traffic in Binzhou City.
基金supported by the National Natural Science Foundation of China(41601071,41721091)the Key Research Program for Frontier Science of Chinese Academy of Sciences(QYZDJ-SSWDQC039)+2 种基金the independent program of SKLCS(SKLCS-ZZ-2018)the CAS"Light of West China"Program(Y62992)Postdoctoral Science Foundation(2015M582725,2016T90963)
文摘The measurement of black carbon （BC） and organic carbon （OC）, dust in total suspended particulates （TSP） was carried out at Yulong Snow Mountain （Mt. Yulong） and Ganhaizi Basin, in the Mt. Yulong region, southwestern China. TSP samples were analyzed using a thermal/optical reflectance carbon analyzer. Results show that average BC and OC concentrations in TSP in the Mt. Yulong region were 1.61±1.15 μg/m3 and 2.96±1.59 μg/m3, respectively. Statistical results demonstrated that there were significant differences in mean BC and OC contents between Ganhaizi Basin and Mt. Yulong at the 0.05 level. Strong correlations between BC and OC indicate their common dominant emission sources and transport processes. Temporal variations ofBC, OC, and optical attenuation （ATN） values were consistent with each other in carbonaceous aerosols. The ratios of OC/BC in monsoon season were significantly higher than in non-monsoon in aerosols from Ganhaizi, which is closely related to the formation of secondary organic carbon （SOC） and extensive motor vehicle emissions from tourism activities. The temporal variations of BC, OC and ATN in carbonaceous aerosols in Ganhaizi and Mt. Yulong were totally different, probably due to elevation difference and diverse tourism activity intensity between the two sites. Time-averaged aerosol optical depth （AOD） at the wavelength of 550 nm in Mt. Yulong was higher than that of the inland of the Tibetan Plateau （TP）. Source apportionment indicated that intensive exhaust emissions from tourism vehicles were the main local sources of atmospheric pollutant in the Mt. Yulong region. Biomass-burning emissions released from South Asia could penetrate into the inland of the TP under the transport of summer monsoon. Further study is needed to assess light absorption and radiative forcing of carbonaceous aerosols, and modeling research in combination with long-term in-situ observations of light-absorbing particulates （LAPs） in the TP is also urgently needed in future work.
