An improved inlet for precisely measuring the atmospheric Ar/N <sub>2</sub> ratio

書誌事項

公開日
2006-04-18
権利情報
  • https://creativecommons.org/licenses/by-nc-sa/2.5/
DOI
  • 10.5194/acp-6-1181-2006
公開者
Copernicus GmbH

説明

<jats:p>Abstract. The atmospheric Ar/N2 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/N2) 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.</jats:p>

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