Mass fluxes and isofluxes of methane (CH4) at a New Hampshire fen measured by a continuous wave quantum cascade laser spectrometer

• Published in: Journal of Geophysical Research Vol. 117; no. D10; pp. D10301 - n/a
• Main Authors: Santoni, Gregory W., Lee, Ben H., Goodrich, Jordan P., Varner, Ruth K., Crill, Patrick M., McManus, J. Barry, Nelson, David D., Zahniser, Mark S., Wofsy, Steven C.
• Format: Journal Article
• Language: English
• Published: Washington, DC Blackwell Publishing Ltd 27.05.2012; American Geophysical Union
• Subjects: Atmospheric sciences; Earth sciences; Earth, ocean, space; eddy-covariance; Exact sciences and technology; Geophysics; isoflux; Methane; Methanogenesis; Scientific apparatus & instruments; spectrometer; Troposphere; wetland; United States; New Hampshire; Eddy covariance method; sampling; Regional scope; Time series; methane; Frequency measurement; North America; Modeling; Fen; greenhouse gas

We have developed a mid‐infrared continuous‐wave quantum cascade laser direct‐absorption spectrometer (QCLS) capable of high frequency (≥1 Hz) measurements of 12CH4 and 13CH4 isotopologues of methane (CH4) with in situ 1‐s RMS precision of 1.5 ‰ and Allan‐minimum precision of 0.2 ‰. We deployed this...