Application of a tunable diode laser to the measurement of CH₄ and N₂O fluxes from field to landscape using several micrometeorological techniques | Macquarie University ResearchOnline

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Application of a tunable diode laser to the measurement of CH₄ and N₂O fluxes from field to landscape using several micrometeorological techniques

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/93232

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Title: Application of a tunable diode laser to the measurement of CH₄ and N₂O fluxes from field to landscape using several micrometeorological techniques
Related: Agricultural and forest meteorology, Vol. 136, Issue 3-4 (2006), p.222-236
DOI: 10.1016/j.agrformet.2004.12.009
Publisher: Elsevier
Date: 2006
Author/Creator: Pattey, E
Author/Creator: Strachan, I. B
Author/Creator: Desjardins, R. L
Author/Creator: Edwards, G. C
Author/Creator: Dow, D
Author/Creator: MacPherson, J. I
Description: Methane and nitrous oxide fluxes were measured at the field to landscape scale by combining tunable diode laser (TDL) technology with micrometeorological techniques. The three following micrometeorological measurement platform were used: (1) tower-based eddy covariance and flux-gradient techniques for measuring methane fluxes over the Canadian boreal forest and nitrous oxide over agricultural fields; (2) blimp-based nocturnal boundary layer (NBL) budget technique over agricultural areas for measuring nitrous oxide fluxes and (3) the NRC Twin Otter aircraft-based relaxed eddy accumulation (REA) to measure methane fluxes over the Canadian boreal forest. The techniques were applied using the TDL in situ (field applications) as well as in the laboratory (environmentally controlled conditions for very high resolution). The latter is accomplished by decoupling in situ air sample collection using PTFE bags from the actual air sample analysis using the TGA100. The application of the TDL to REA and NBL flux measurement is unique. Its versatility is illustrated using results obtained from experiments carried out at scales varying from field to farms to landscape. The results of these experiments clearly demonstrate the importance of knowing the variability of fluxes temporally and spatially to broach issues of scaling up to obtain fluxes representative of large areas.
Description: 15 page(s)
Subject Keyword: tunable diode laser
Subject Keyword: methane
Subject Keyword: nitrous oxide
Subject Keyword: eddy covariance
Subject Keyword: relaxed eddy accumulation
Subject Keyword: flux gradient
Subject Keyword: nocturnal boundary layer budget
Resource Type: journal article
Organisation: Macquarie University. Dept. of Environment and Geography

Identifier: http://hdl.handle.net/1959.14/93232
Identifier: ISSN:0168-1923
Identifier: mq-rm-2009010587
Language: eng
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