An improved inlet for precisely measuring the atmospheric Ar/N 2 ratio
An improved inlet for precisely measuring the atmospheric Ar/N 2 ratio
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用于精确测量大气 Ar/N 2 比率的改进入口
DOI：
10.5194/acp-6-1181-2006
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发表时间：
2005
影响因子：
6.3
通讯作者：
W. Paplawsky
中科院分区：
文献类型：
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作者：
T. Blaine;R. Keeling;W. Paplawsky
大气Ar/N2比有望作为海气热交换的示踪剂，但由于采样人为因素，这一应用受到了部分阻碍。在这里，我们表明，在δ（Ar/N 2）的变化，由于在入口处的热分馏可以在40-80每meg的顺序，我们介绍了使用的吸气式太阳能屏蔽，成功地最大限度地减少这种分馏。使用这个新的入口收集的数据具有1.0每兆或更少的平均昼夜周期，这表明任何残余热分馏效应降低到这个水平。
The atmospheric Ar/N 2 ratio is expected to be useful as a tracer of air-sea heat exchange, but this application has been hindered in part due to sampling artifacts. Here we show that the variability in δ(Ar/N 2 ) due to thermal fractionation at the inlet can be on the order of 40-80 per meg, and we introduce the use of an aspirated solar shield that successfully minimizes such fractionation. The data collected using this new inlet have a mean diurnal cycle of 1.0 per meg or less, suggesting that any residual thermal fractionation effect is reduced to this level.