| 东亚地区二氧化碳体积分数变化特征 |
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| 引用本文： | 党小晨,张美根,朱彬.东亚地区二氧化碳体积分数变化特征[J].南京气象学院学报,2012,4(1):40-46. |
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| 作者姓名： | 党小晨 张美根 朱彬 |
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| 作者单位： | 南京信息工程大学大气物理学院, 南京, 210044;中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室, 北京, 100029;中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室, 北京, 100029;南京信息工程大学大气物理学院, 南京, 210044 |
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| 基金项目： | 中国科学院战略性先导科技专项(XDA05040404);国家自然科学基金(40875078) |
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| 摘 要： | 利用2004年以来东亚地区10个本底观测站大气φ(CO2)观测资料,分析了各站大气φ(CO2)的变化特征及其各站之间的差异,讨论了下垫面特征、源汇作用等对φ(CO2)变化的影响.结果表明:10个本底站大气月均φ(CO2)有明显的季节变化,高值多出现在冬春等寒冷季节,而低值则多出现在6—9月,属于北半球的夏季;大气φ(CO2)日变化趋势较为一致,15时(当地时间)前后达到全天最低,随后φ(CO2)升高,并在日落后继续积累,至清晨7时(当地时间)前后达到全天最高,之后φ(CO2)随着太阳辐射的增强而逐渐降低,且平均φ(CO2)水平与下垫面植被量成反比,φ(CO2)日变化的幅度与下垫面植被量成反比.作为全球基准站之一的瓦里关山站,2004—2008年φ(CO2)年均值逐年增加,年增长率为2.28×10-6/a.
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| 关 键 词： | 大气CO2 温室气体 气候变化 |
| 收稿时间： | 2011/6/30 0:00:00 |
Preliminary analysis of atmospheric CO2 variations in East Asia |
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| DANG Xiaochen,ZHANG Meigen and ZHU Bin.Preliminary analysis of atmospheric CO2 variations in East Asia[J].Journal of Nanjing Institute of Meteorology,2012,4(1):40-46. |
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| Authors: | DANG Xiaochen ZHANG Meigen and ZHU Bin |
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| Institution: | School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044 |
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| Abstract: | Based on observed atmospheric CO2 concentrations at 10 background stations in East Asia,temporal and spatial variations in atmospheric CO2 are analyzed,and impacts of the underlying surface,source and sink upon atmospheric CO2 levels are also discussed.Analysis results reveal that the monthly averaged CO2 concentrations at the observation stations exhibit strong seasonal variations.The higher values appear in cold seasons such as winter and spring,while the lower values present from July to September,i.e.,summer in northern hemisphere.Diurnal variations in CO2 concentrations are approximately same at these stations.The concentration reaches its lowest at about 15:00 LST (Local Standard Time),and then goes up constantly during night and reaches its highest at 7:00 LST,and after that it decreases subsequently with the radiation strengthens.There are inverse relationships between the mean CO2 concentration and the vegetable amount of underlying surface,and between the range of the daily concentration variation and the vegetable amount,respectively.The annually averaged CO2 concentration rose constantly from 2004 to 2008 at Mt.Waliguan,one of global background stations,with an increase rate of 2.28×10-6/a. |
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| Keywords: | atmospheric carbon dioxide greenhouse gases climate change |
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