研究论文
周凌晞,汤洁,温玉璞,张晓春,乜虹.地面风对瓦里关山大气CO2本底浓度的影响分析[J].环境科学学报,2002,22(2):135-139
地面风对瓦里关山大气CO2本底浓度的影响分析
- Impact of local surface wind on the atmospheric carbon dioxide background concentration at Mt.Waliguan
- 基金项目：联合国全球环境基金(GLO91G32);国家科技部基础性工作项目(G99A07)
- 作者
- 单位
- 周凌晞
- 1. 北京大学环境科学中心,北京 100871; 2. 中国气象科学研究院,北京 100081
- 汤洁
- 中国气象科学研究院,北京 100081
- 温玉璞
- 中国气象科学研究院,北京 100081
- 张晓春
- 青海省气象局,西宁 810001
- 乜虹
- 青海省气象局,西宁 810001
- 摘要：使用1994年7月—2000年7月大气CO2和地面风现场连续观测资料,分析了瓦里关全球大气本底基准站(36°17′N,100°54′E,海拔3816m)地面风变化对大气CO2本底浓度的影响.结果表明,水平风向、风速和垂直风向、风速的变化对大气CO2观测值的影响在春、夏、秋、冬季有明显不同.由大量观测事实的统计平均还给出了瓦里关山大气CO2浓度在不同季节的分布范围和日变化类型,并分析了形成原因.将地面风数据作为大气CO2本底资料的过滤因子之一,提出了适用于不同使用目的和要求的我国内陆高原地区大气CO2本底数据筛选方法.
- Abstract：In combination with the partitioned continuous data sets of atmospheric CO2 and local surface wind corresponding to the different seasons from July 1994 to July 2000, the impact of surface wind system on the atmospheric CO2 background concentration at Mt.Waliguan (36°17′N,100°54′E,3816m/asl), one of the global atmospheric baseline monitoring stations in western China, was studied. The results indicated that the variabilities in the horizontal and vertical wind speed/direction over periods of different seasons has distinctly impact on the observed CO2 variation. Statistical analysis also interpreted the averaged CO2 distribution and its dinrual variation pattern in different seasons over the 6 years. By employing the local surface wind outcome as one of the data filters for the atmospheric CO2 observed concentrations at in land plateau of China, the selection procedures of background concentrations were provided for different purpose and requirements.
- Key words：CO2 background variation surface winds data selection
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