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

التفاصيل البيبلوغرافية
العنوان: Seasonal dynamics of methane emissions from a subarctic fen in the Hudson Bay Lowlands
المؤلفون: K. L. Hanis, M. Tenuta, B. D. Amiro, T. N. Papakyriakou
المصدر: Biogeosciences, Vol 10, Iss 7, Pp 4465-4479 (2013)
بيانات النشر: Copernicus Publications, 2013.
سنة النشر: 2013
المجموعة: LCC:Ecology
LCC:Life
LCC:Geology
مصطلحات موضوعية: Ecology, QH540-549.5, Life, QH501-531, Geology, QE1-996.5
الوصف: 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 analyser 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 shoulder and growing seasons. 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 the water table also exerted influence, with FCH4 highest when water was 2–13 cm below and lowest when it was at or above the mean peat surface.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1726-4170
1726-4189
Relation: http://www.biogeosciences.net/10/4465/2013/bg-10-4465-2013.pdf; https://doaj.org/toc/1726-4170; https://doaj.org/toc/1726-4189
DOI: 10.5194/bg-10-4465-2013
URL الوصول: https://doaj.org/article/c42fee1f52a94a0398fe48725f83143a
رقم الأكسشن: edsdoj.42fee1f52a94a0398fe48725f83143a
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:17264170
17264189
DOI:10.5194/bg-10-4465-2013