|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Evolution of boundary layer ozone in Shijiazhuang,a suburban site on the North China Plain显示文摘The structure of the boundary layer affects the evolution of ozone(O3), and research into this structure will provide important insights for understanding photochemical pollution.In this study, we conducted a one-month observation(from June 15 to July 14, 2016) of the boundary layer meteorological factors as well as O3 and its precursors in Luancheng County,Shijiazhuang(37°53′N, 114°38′E). Our research showed that photochemical pollution in Shijiazhuang is serious, and the mean hourly maximum and mean 8-hr maximum O3 concentrations are 97.9 ± 26.1 and 84.4 ± 22.4 ppbV, respectively. Meteorological factors play a significant role in the formation of O3. High temperatures and southeasterly winds lead to elevated O3 values, and at moderate relative humidity(40%–50%) and medium boundary layer heights(1200–1500 m), O3 production sensitivity occurred in the transitional region between volatile organic compounds(VOC) and nitrogen oxides(NOx) limitations,and the O3 concentration was the highest. The vertical profiles of O3 were also measured by a tethered balloon. The results showed that a large amount of O3 was stored in the residual layer, and the concentration was positively correlated with the O3 concentration measured the previous day. During the daytime of the following day, the contribution of O3 stored in the residual layer to the boundary layer reached 27%± 7% on average. | Wei Zhao Guiqian Tang Huan Yu Yang Yang Yinghong Wang Lili Wang Junlin An Wenkang Gao Bo Hu Mengtian Cheng Xingqin An Xin Li Yuesi Wang | 2019 | Journal of Environmental Sciences2019，31，9： | 15 |
| 2 | Mixing state of individual carbonaceous particles during a severe haze episode in January 2013,Nanjing,China显示文摘Chemical composition,hourly counts,and sizes of atmospheric carbonaceous particles were measured to investigate their mixing state on clear and hazy days.623,122 carbonaceous particles with sizes0.2-2.0 μm was analyzed using a single-particle aerosol mass spectrometer from 1st to 17 th January2013.Particle types included biomass/biofuel burning particles(biomass),element carbon(EC-dominant)particles that were also mixed with biomass/biofuel burning species(EC-biomass) or secondary species(EC-secondary),organic carbon(OC),internally mixed OC and EC(OCEC),ammonium-containing(ammonium) and sodium-containing(sodium) particles.On clear days the top ranked carbonaceous particle types were biomass(48.2%),EC-biomass(15.7%),OCEC(11.1%),and sodium(9.6%),while on hazy days they were biomass(37.3%),EC-biomass(17.6%),EC-secondary(16.6%),and sodium(12.7%).The fractions of EC-secondary,ammonium(10%),and sodium particle types were elevated on hazy days.Numbers of EC-secondary particles were more than four times those on clear days(4.1%).Thus,carbonaceous particles mixed with ammonium,nitrate and sulfate during aging and transport,enhancing their light extinction effects and hygroscopic growth under high relative humidity on hazy days,further reducing visibility.Our real-time single-particle data showed that changes to mixing state had a significant impact on light extinction during haze events in Nanjing. | Honglei Wang Bin Zhu Zefeng Zhang Junlin An Lijuan Shen | 2015 | Particuology2015，13，3： | 12 |
| 3 | Characteristics of black carbon aerosol in Jiaxing,China during autumn 2013显示文摘We conducted measurements of black carbon(BC) aerosol in Jiaxing,China during autumn from September 26 to November 30,2013.We investigated temporal and diurnal variations of BC,and its correlations with meteorological parameters and other major pollutants.Results showed that hourly mass concentrations of BC ranged from 0.2 to 22.0 μg/m^3,with an average of 5.1 μg/m^3.The diurnai variation of BC exhibited a bimodal distribution,with peaks at 07:00 and 18:00.The morning peak was larger than the evening peak.The mass percentages of BC in PM_(2.5) and PM_(10) were 7.1%and 4.8%,respectively.The absorption coefficient of BC was calculated to be 44.4 Mm^(-1),which accounted for 11.1%of the total aerosol extinction.BC was mainly emitted from local sources in southwestern Jiaxing where BC concentrations were generally greater than 11 μg/m^3 during the measurement period.Correlation analysis indicated that the main sources of BC were motor vehicle exhaust,and domestic and industrial combustion. | Lijuan Shen Li Li Sheng Lu Xiaohan Zhang Jie Liu Junlin An Guojun Zhang Bo Wu Fei Wang | 2015 | Particuology2015，13，3： | 2 |
| 4 | Mechanism for the formation and microphysical characteristics of submicron aerosol during heavy haze pollution episode in the Yangtze River Delta, China显示文摘 | Honglei Wang Junlin An Lijuan Shen Bin Zhu Chen Pan Zirui Liu Xiaohui Liu Qing Duan Xuan Liu Yuesi Wang | 2014 | Science of the Total Environment2014，，： | 2 |
| 5 | Characteristics and source apportionment of VOCs measured in Shanghai, China显示文摘 | Changjie Cai Fuhai Geng Xuexi Tie Qiong Yu Junlin An | 2010 | Atmospheric Environment2010，，38： | 2 |
| 6 | Analysis of the Effect of Optical Properties of Black Carbon on Ozone in an Urban Environment at the Yangtze River Delta,China显示文摘Black carbon(BC)reduces the photolysis coefficient by absorbing solar radiation,thereby affecting the concentration of ozone(O_(3))near the ground.The influence of BC on O_(3)has thus received much attention.In this study,Mie scattering and the tropospheric Ultraviolet and Visible radiation model are used to analyze the effect of BC optical properties on radiation.Combined with data of O_(3)precursors in Nanjing in 2014,an EKMA curve is drawn,and the variations in O_(3)concentration are further investigated using a zero-dimensional box mechanism model(NCAR MM).When O_(3)precursors are unchanged,radiation and O_(3)show a highly similar tendency in response to changing BC optical properties(R=0.997).With the increase of modal radius,the attenuation of fresh BC to radiation and O_(3)first trends upward before decreasing.In the mixing process,the attenuation of BC to radiation and O_(3)presents an upward tendency with the increase of relative humidity but decreases rapidly before increasing slowly with increasing thickness of coating.In addition,mass concentration is another major factor.When the BC to PM_(2.5)ratio increases to 5%in Nanjing,the radiation decreases by approximately 0.13%-3.71%while O_(3)decreases by approximately 8.13%-13.11%.The radiative effect of BC not only reduces O_(3)concentration but also changes the EKMA curve.Compared with the NO_(x)control area,radiation has a significant influence on the VOCs control area.When aerosol optical depth(AOD)increases by 17.15%,the NO_(x)to VOCs ratio decreases by 8.27%,and part of the original NO_(x)control area is transferred to the VOCs control area. | Junlin AN Huan LV Min XUE Zefeng ZHANG Bo HU Junxiu WANG Bin ZHU | 2021 | Advances in Atmospheric Sciences2021，38，7： | 1 |
| 7 | Characteristics and source apportionment of VOCs measured in Shanghai, China显示文摘 | Changjie Cai Fuhai Geng Xuexi Tie Qiong Yu Junlin An | 2010 | Atmospheric Environment2010，，38： | 1 |
| 8 | Characteristics and source apportionment of VOCs measured in Shanghai, China显示文摘 | Changjie Cai Fuhai Geng Xuexi Tie Qiong Yu Junlin An | 2010 | Atmospheric Environment2010，，38： | 1 |
| 9 | Mechanism for the formation and microphysical characteristics of submicron aerosol during heavy haze pollution episode in the Yangtze River Delta, China显示文摘 | WANG Honglei AN Junlin SHEN Lijuan | 2014 | Science of the Total Environment2014，490，： | 1 |
| 10 | Characteristics and source apportionment of VOCs measured in Shanghai, China显示文摘 | Changjie Cai Fuhai Geng Xuexi Tie Qiong Yu Junlin An | 2010 | Atmospheric Environment2010，，38： | 1 |
| 11 | Characteristics and source apportionment of VOCs measured in Shanghai, China显示文摘 | Changjie Cai Fuhai Geng Xuexi Tie Qiong Yu Junlin An | 2010 | Atmospheric Environment2010，，38： | 1 |
| 12 | Observation of aerosol optical properties and particulate pollution at background station in the Pearl River Delta region显示文摘 | CHEN Jianshan XIN Jinyuan AN Junlin | 2008 | Atmospheric Research2008，47，27： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员