龙凤山大气本底站CO浓度特征及传输路径分析  

Study on the CO concentration characteristics and transport pathways at Longfengshan regional background station

作　　者：王海宁 于大江[2] 刘硕 臧昆鹏 洪海祥 邱珊珊 熊浩宇 李嘉鑫 卿雪梅 蒋凯 方双喜 WANG Haining;YU Dajiang;LIU Shuo;ZANG Kunpeng;HONG Haixiang;QIU Shanshan;XIONG Haoyu;LI Jiaxin;QING Xuemei;JIANG Kai;FANG Shuangxi(School of Environmental Science and Engineering,Nanjing University of Information Science&Technology,Nanjing 210044;Longfengshan Regional Atmospheric Background Station,Wuchang 150200;Zhejiang University of Technology,Hangzhou 310014;Zhejiang Carbon Neutral Innovation Institute,Zhejiang University of Technology,Hangzhou 310014;Yangtze River Delta R&D Centre,Monitoring&Assessment Center for GHGs&Carbon Neutrality,China Meteorological Administration,Hangzhou 310014;Tieli Meteorological Bureau,Yichun 152500)

机构地区：[1]南京信息工程大学环境科学与工程学院,南京210044 [2]龙凤山区域大气本底站,五常150200 [3]浙江工业大学环境学院,杭州310014 [4]浙江工业大学浙江碳中和创新研究院,杭州310014 [5]中国气象局温室气体及碳中和监测评估中心(长三角研发中心),杭州310014 [6]铁力市气象局,伊春152500

出　　处：《环境科学学报》2022年第9期392-400,共9页Acta Scientiae Circumstantiae

基　　金：国家重点研发计划(No.2020YFA0607502)。

摘　　要：利用2017年1月—2019年11月龙凤山大气本底站一氧化碳(CO)连续观测资料和NOAA再分析资料,对东北平原地区大气CO浓度季节变化及其排放源特征进行研究.结果表明:龙凤山站CO日变化规律具有季节性差异,春、秋和冬季CO浓度均在午后13:00—14:00出现最低值,秋和冬季19:00出现峰值,春季2:00出现最峰值,冬季CO浓度日平均最大,日振幅最大.夏季CO日变化不同于其他季节,在8:00—13:00维持较高值,在16:00—次日04:00维持较低,峰值出现在08:00,谷值出现在00:00.龙凤山站CO浓度具有明显的周期性季节变化和波动下降趋势,呈现出冬季高夏季低的特点,最高值出现在1月,最低值出现在6月,月平均浓度明显高于青藏高原地区浓度水平,全年CO月均值振幅为134.8×10^(-9)±2.5×10^(-9)(物质的量分数,下同).在春、夏和秋季西南方向地面风能够明显抬升观测CO浓度,冬季西北方向地面风能够明显抬升观测CO浓度.后向轨迹聚类、浓度权重轨迹分析(CWT)以及地面风结果分析表明:SSW-SW-WSW扇区内的城市交通及工业等人为排放是龙凤山站的CO潜在源区,此外,冬季的NW-NNW-N扇区的短距离输送也是龙凤山站的CO潜在源区.Characteristics of atmospheric CO concentration at the Longfengshan Regional Station were investigated in this study based on continuous observation records and reanalysis meteorological data from January 2017 to November 2019.Our results showed that the diurnal variation of CO at Longfengshan Regional Station had seasonal differences.In spring,autumn and winter,the CO concentration reached the minimum from 13:00 to 14:00,and peaked at 19:00.The highest daily average and daily amplitude was found in winter.In summer,high values were maintained between 8:00—13:00 and low at 16:00—04:00,the peak appeared at 08:00 and the minimum appeared at 00:00.The CO concentration showed an obvious seasonal cycle and a fluctuant decline trend,with the high values in summer and low values in winter.The maximum appeared in January and the minimum appeared in June.The monthly average was significantly higher than that of the Qinghai-Tibet Plateau.The monthly amplitude was 134.8×10^(-9)±2.5×10^(-9)(mole fraction,the same below).In spring,summer and autumn,higher CO mole fractions were observed when surface wind from southwest,while,in winter,surface winds from northwest obviously enhanced the CO values.The cluster analysis of backward trajectories,concentration-weighted trajectory(CWT)analysis,and surface wind indicated that anthropogenic emissions by urban transportation and industry from SSW-SW-WSW sector were the CO potential sources of Longfengshan Station.In addition,the short-distance transport from NW-NNW-N sector in winter was also the CO potential sources.

关 键 词：本底站 大气CO 后向轨迹分析 浓度权重轨迹(CWT)分析 

分 类 号：X51[环境科学与工程—环境工程]