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Dynamics of methane emissions from a freshwater marsh of northeast China [An article from: Science of the Total Environment, The]


by W. Yang, C. Song, J. Zhang

List Price: $10.95
Available: Available for download now
Studio: Elsevier
Binding: Digital
Number Of Pages: 6
Publication Date: December 01, 2006
Publisher: Elsevier


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Product Description
This digital document is a journal article from Science of the Total Environment, The, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
In this paper, CH"4 flux was measured from Nov. 2002 to Oct. 2005, to estimate CH"4 emissions in winter and during freeze-thaw period, and interannual variation in CH"4 emissions in freshwater marsh in northeast China. The results showed that there was an obvious CH"4 emission (0.1-2.3 mg m^-^2 h^-^1) in the freshwater marsh in winter. Flux of CH"4 in winter (November to March the next year) was about 3.8%, 5.5%, and 2.2% of the whole year in 2003, 2004, and 2005, respectively. Emission of CH"4 significantly increased during the freeze-thaw period (April-June), and was about 30.8%, 20.9%, and 20.6% of the whole year in 2003, 2004, and 2005, respectively. Standing water depth greatly governed interannual variation of CH"4 emissions from marshes during the thaw-freeze period. Interannual variation of CH"4 emissions was significant during the growing season (p<0.05). Standing water depth during April to June was a primary factor, which affected the interannual variation of CH"4 flux during the growing season. Precipitation during the preceding non-growing season affected CH"4 emission indirectly via standing water depth.
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