合肥科学岛低对流层二氧化碳时空分布特征  

Temporal and spatial distribution characteristics of lower troposphere carbon dioxide in Hefei Science Island

作　　者：杨杰 胡顺星[1] 苑克娥[1] 孙培育 黄见 王一楠 

机构地区：[1]中国科学院安徽光学精密机械研究所,中国科学院大气光学重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026 [3]中国科学院大学,北京100049 [4]中国科学院大气物理研究所,中层大气和全球环境探测重点实验室,北京100029

出　　处：《中国环境科学》2018年第3期838-844,共7页China Environmental Science

基　　金：国家自然科学基金资助项目(41575032,41475001,41505019)

摘　　要：依据合肥市科学岛2013~2016年的CO_2体积比浓度廓线,分别从夜间?季节和年度分析了亚热带季风气候的CO_2分布特点和合肥科学岛的CO_2源汇特征.(1)大气CO_2体积比浓度随高度增加而减小,390m的CO_2浓度约为15m浓度的95%,夜间随时间推移浓度增加幅度约5%,天亮时CO_2浓度有减小的趋势;(2)测量点高度大于100m时,季节特征较明显,CO_2体积比浓度夏季最低,冬季最高,浓度相差约10×10^(-6);(3)测量点高度大于100m时,2013~2016年CO_2体积比浓度的年分布随高度变化的梯度相关系数大于0.9,体积比浓度年增长约2.1648×10^(-6).通过三个时间尺度的CO_2体积比浓度廓线分析得出,CO_2浓度特征是动植物活动和大气运动等共同作用的结果;CO_2长期循环过程中,存在近地面CO_2向高空的传输效应.Based on the carbon dioxide volume mixing ratio concentration profiles of Hefei Science Island from 2013to 2016, the distribution characteristics of carbon dioxide in the subtropical monsoon climate and the characteristics ofcarbon dioxide source and sink in Hefei science island were analyzed from the night, season and year respectively. Theconcentration of carbon dioxide in the atmosphere decreased with the increase of altitude, the carbon dioxideconcentration of 390m was about 95% that of 15m. The concentration of carbon dioxide gradually increased at night（about 5%）, while there was a tendency to decrease at drawn. When the measurement height was more than 100m, theobvious seasonal change was shown, with the minimum in summer and the maximum in winter, which the difference inconcentration of about 10 × 10-6. With a yearly growth rate of about 2.1648× 10-6, the annual distribution of theconcentration of carbon dioxide from 2013 to 2016 had no significant difference in the gradient change of the heightabove 100m, the correlation coefficient was above 0.9, and the volume mixing ratio concentration increased. Throughdata analysis from three different timescales, it could be concluded that the concentration of carbon dioxide near theground was greatly influenced by the atmospheric environment. The seasonal distribution of carbon dioxideconcentration was the result of a combination of atmospheric movement and the activities of plants and animals. In theprocess of long-term carbon dioxide cycling, there was a current that the near-surface carbon dioxide transported to ahigher altitude.

关 键 词：大气光学 激光雷达 大气成分 探测 

分 类 号：X511[环境科学与工程—环境工程] TN958.96[电子电信—信号与信息处理]