The tropospheric 14CO2 level in mid-latitudes of the Northern Hemisphere (1959-2003)
The tropospheric 14CO2 level in mid-latitudes of the Northern Hemisphere (1959-2003)
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DOI：
10.1017/s0033822200033130
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发表时间：
2004-01-01
期刊：
影响因子：
8.3
通讯作者：
Kromer, B
中科院分区：
文献类型：
--
作者：
Levin, I;Kromer, B
介绍了一套涵盖1959年至2003年时间跨度的准连续观测对流层（CO2）-C-14综合数据集。样品采集于欧洲3个山区，海拔高度分别为1205 m（Schauinsiand）、1800 m（Vermunt）和3450 m。作为]（少女峰），并在海德堡放射性碳实验室分析。少女峰（1986-2003年）的数据集被认为代表了北方半球中纬度地区的自由对流层背景水平，因为它与海洋基线站Mace Head（爱尔兰西海岸）最近（尚未公布）的测量结果进行了很好的比较。Vermunt和绍因斯兰的记录受到欧洲区域化石燃料CO2排放的显著影响。然而，在年平均基础上，相应的Delta（CO2）-C-14消耗量仅比少女峰低千分之五。Vermunt和绍因斯兰都代表欧洲大陆对流层的平均值。
A comprehensive tropospheric (CO2)-C-14 data set of quasi-continuous observations covering the time span from 1959 to 2003 is presented. Samples were collected at 3 European mountain sites at height levels of 1205 m (Schauinsiand), 1800 m (Vermunt), and 3450 m. as] (Jungfraujoch), and analyzed in the Heidelberg Radiocarbon Laboratory. The data set from Jungfraujoch (1986-2003) is considered to represent the free tropospheric background level at mid-latitudes of the Northern Hemisphere, as it compares well with recent (yet unpublished) measurements made at the marine baseline station Mace Head (west coast of Ireland). The Vermunt and Schauinsland records are significantly influenced by regional European fossil fuel CO2 emissions. The respective Delta(CO2)-C-14 depletions, on an annual mean basis, are, however, only 5 parts per thousand less than at Jungfraujoch. Vermunt and Schauinsland both represent the mean continental European troposphere.