A new low-power, open-path instrument for measuring methane flux by eddy covariance

Autor:	Dayle K. McDermitt, Walter C. Oechel, Steven F. Oberbauer, B. Riensche, Gregory Starr, George Burba, Donatella Zona, Liukang Xu, Jessica L. Schedlbauer, Steven J. Hastings, Anatoly Komissarov, Tyler Anderson
Rok vydání:	2010
Předmět:	Spectrum analyzer Physics and Astronomy (miscellaneous) Meteorology Physics General Engineering Eddy covariance General Physics and Astronomy Sensible heat Computational physics Anemometer Environmental science Water vapor Noise (radio) Optical path length Tunable laser
Zdroj:	Applied physics B: lasers and optics
ISSN:	1432-0649 0946-2171
Popis:	This paper describes a new low-power instrument for measuring methane flux by eddy covariance method at sites without grid power. Design and field performance of the LI-7700 Methane Analyzer (LI-COR Biosciences) are examined in this study. The instrument uses 8 W of power in steady-state operation and employs a tunable diode laser in an open Herriott cell configuration with 0.47 m base path and 30 m optical path length. Methane number density is measured using wavelength modulation spectroscopy (WMS) with 2f detection. Typical signal noise is
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7377e1a83254886a8b1ed83b6ceb2ff https://doi.org/10.1007/s00340-010-4307-0 Zobrazit plný text záznamu Full text from SpringerLink