Mid-ir cavity ringdown spectroscopy measurements of atmospheric ethane to methane ratio
Shen, Linhan
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https://hdl.handle.net/2142/91413
Description
Title
Mid-ir cavity ringdown spectroscopy measurements of atmospheric ethane to methane ratio
Author(s)
Shen, Linhan
Contributor(s)
Okumura, Mitchio
Christensen, Lance
Bui, Thinh Quoc
Issue Date
2016-06-20
Keyword(s)
Spectroscopy in Atmospheric Chemistry
Abstract
In this work, we demonstrated a mid-IR (3.3 $\mu$m) cw cavity ringdown spectrometer capable of measuring atmospheric ethane abundance and ethane to methane ratio. This technique can measure atmospheric ethane concentration as low as 70 ppb. Since ethane is a tracer for thermogenic methane emissions, this technique could be used to identify sources of atmospheric methane. We have demonstrated the capability of this instrument by measuring the atmospheric ethane composition and ethane to methane ratio in ambient air in Pasadena, California.
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