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| 1 | 成都碳质气溶胶变化特征及二次有机碳的估算显示文摘利用2020年6月~2021年5月在成都市观测的碳质气溶胶小时分辨率数据,分析了气溶胶中总碳(TC)、有机碳(OC)、元素碳(EC)和二次有机碳(SOC)的变化特征.结果表明:观测期间m(TC)、m(OC)、m(EC)和r(OC/EC)的年均值分别为(9.5±4.4)μg/m^(3),(6.4±3.2)μg/m^(3),(3.2±1.1)μg/m^(3),2.2±0.5.成都m(TC)、m(OC)、m(EC)均表现冬为季最高((15.8±8.2),(11.1±5.8),(4.6±2.5)μg/m^(3)),春秋次之,夏季最低((6.1±0.9),(4.5±2.0),(2.7±1.4)μg/m^(3))的特征.r(OC/EC)季节均值(1.9~2.6)以及四个季节的m(TC)、m(OC)、m(EC)呈现早(07:00~09:00)晚(22:00~01:00)“双峰”的日变化特征,表明机动车排放源对成都碳质气溶胶的影响较大.春夏季OC与EC的相关性小于秋冬季,表明春夏季OC、EC来源差异较大.由EC示踪法和最小相关性法得到m(SOC),r(SOC/OC)在夏季最大(40.4%),冬季最小(27.3%).春、夏季SOC与O3呈显著正相关,表明较强的光化学反应对SOC生成有重要贡献.选取各季节连续高m(TC)时段与季节平均作对比,发现碳质气溶胶有明显夜间积累过程,夏季高浓度时段二次生成使得m(OC)增长显著高于m(EC),r(OC/EC)也迅速上升. | 李朝阳 袁亮 张小玲 韦荣 李双志 | 2022 | 中国环境科学2022，42，6： | 6 |
| 2 | Light absorption properties and potential sources of brown carbon in Fenwei Plain during winter 2018–2019显示文摘A distinctive kind of organic carbon aerosol that could absorb ultraviolet-visible radiation is called brown carbon(Br C),which has an important positive influence on radiative budget and climate change.In this work,we reported the absorption properties and potential source of Br C based on a seven-wavelength aethalometer in the winter of 2018–2019 at an urban site of Sanmenxia in Fenwei Plain in central China.Specifically,the mean value of Br C absorption coefficient was 59.6±36.0 Mm^(-1) at 370 nm and contributed 37.7%to total absorption,which made a significant impact on visibility and regional environment.Absorption coefficients of Br C showed double-peak pattern,and Br C had shown small fluctuations under haze days compared with clean days.As for the sources of Br C,Br C absorption coefficients expressed strong correlations with element carbon aerosols and primary organic carbon aerosols,indicating that most of Br C originated from primary emissions.The linear correlations between trace metal elements(K,As,Fe,Mn,Zn,and Pb)and Br C absorption coefficients further referred that the major sources of Br C were primary emissions,like coal burning,biomass burning,and vehicle emissions.The moderate relationship between Br C absorption coefficients and secondary organic aerosols suggested that secondary production of Br C also played an important role.The 120 hr backward air mass trajectories analysis and concentration-weighted trajectories analysis were also used to investigate potential sources of Br C in and around this area,which inferred most parts of Br C were derived from local emissions. | Wenyu Zhang Weigang Wang Jie Li Shuangliang Ma Chaofan Lian Kun Li Bo Shi Mingyuan Liu Yanyu Li QingQing Wang Yele Sun Shengrui Tong Maofa Ge | 2021 | Journal of Environmental Sciences2021，33，4： | 6 |
| 3 | 新乡市大气细颗粒物中碳质气溶胶的污染水平、季节特征及来源追踪显示文摘为了探究典型“2+26”传输通道城市之一的新乡市PM_(2.5)中碳质气溶胶的污染水平、季节分布及来源特征,于2019年7月至2020年4月在河南师范大学采集PM_(2.5)样品,采用热/光碳分析仪测定了8种碳组分质量浓度.结果显示,新乡市PM_(2.5)年均质量浓度为(66.25±35.73)μg·m^(-3),TCA(Total Carbonaceous Aerosol)/PM_(2.5)质量浓度比年均为(25.16±6.93)%,说明新乡市碳组分污染较为严重.碳组分具有显著的季节变化特征,冬季OC(Organic Carbon)和EC(Elemental Carbon)的质量浓度分别为(13.50±6.43)μg·m^(-3)和(5.67±2.32)μg·m^(-3),明显高于其他季节,说明冬季污染较为严重.SOC(Secondary Organic Carbon)/OC质量浓度比值夏季最高(49.37±17.73)%,冬季最低(39.06±15.83)%.OC和EC的相关性冬春季(R^(2)=0.70和0.58)明显高于夏秋季(R^(2)=0.51和0.34),表明冬春季碳组分来源相似.地理来源分析发现,河南省西部、湖北省北部等是其潜在贡献源区. | 赵文鹏 贾梦珂 李洋 肖晴晴 徐肃阳 洪启航 宋天颂 刘永丽 刘桓嘉 | 2023 | 河南师范大学学报(自然科学版)2023，51，3： | 1 |
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