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Seasonal Dynamics of Methane Emissions from a Subarctic Fen in the Hudson Bay Lowlands : Volume 10, Issue 3 (08/03/2013)

By Hanis, K. L.

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Book Id: WPLBN0004004427
Format Type: PDF Article :
File Size: Pages 36
Reproduction Date: 2015

Title: Seasonal Dynamics of Methane Emissions from a Subarctic Fen in the Hudson Bay Lowlands : Volume 10, Issue 3 (08/03/2013)  
Author: Hanis, K. L.
Volume: Vol. 10, Issue 3
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Tenuta, M., Amiro, B. D., Papakyriakou, T. N., & Hanis, K. L. (2013). Seasonal Dynamics of Methane Emissions from a Subarctic Fen in the Hudson Bay Lowlands : Volume 10, Issue 3 (08/03/2013). Retrieved from http://www.ebooklibrary.org/


Description
Description: Dept. Soil Science, University of Manitoba, Winnipeg, Manitoba, Canada. Ecosystem-scale methane (CH4) flux (FCH4) over a subarctic fen at Churchill, Manitoba, Canada was measured to understand the magnitude of emissions during spring and fall shoulder seasons, and the growing season in relation to physical and biological conditions. FCH4 was measured using eddy covariance with a closed-path analyzer in four years (2008–2011). Cumulative measured annual FCH4 (shoulder plus growing seasons) ranged from 3.0 to 9.6 g CH4 m−2 yr−1 among the four study years, with a mean of 6.5 to 7.1 g CH4 m−2 yr−1 depending upon gap-filling method. Soil temperatures to depths of 50 cm and air temperature were highly correlated with FCH4, with near surface soil temperature at 5 cm most correlated across spring, fall, and the whole season. The response of FCH4 to soil temperature at the 5 cm depth and air temperature was more than double in spring to that of fall. Emission episodes were generally not observed during spring thaw. Growing season emissions also depended upon soil and air temperatures but water table also exerted influence with FCH4 highest when water was 2–13 cm below and least when it was at or above the mean peat surface.

Summary
Seasonal dynamics of methane emissions from a subarctic fen in the Hudson Bay Lowlands

Excerpt
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