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: Tim Papakyriakou, Mario Tenuta, Brian D. Amiro, K. L. Hanis
المصدر: Biogeosciences, Vol 10, Iss 7, Pp 4465-4479 (2013)
بيانات النشر: Copernicus Publications, 2013.
سنة النشر: 2013
مصطلحات موضوعية: Peat, 010504 meteorology & atmospheric sciences, Water table, Eddy covariance, lcsh:Life, Flux, Growing season, 01 natural sciences, Methane, chemistry.chemical_compound, lcsh:QH540-549.5, Ecology, Evolution, Behavior and Systematics, Earth-Surface Processes, 0105 earth and related environmental sciences, Hydrology, lcsh:QE1-996.5, 04 agricultural and veterinary sciences, 15. Life on land, Subarctic climate, lcsh:Geology, lcsh:QH501-531, chemistry, 13. Climate action, 040103 agronomy & agriculture, Environmental science, 0401 agriculture, forestry, and fisheries, lcsh:Ecology, Bay
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.
وصف الملف: application/pdf
اللغة: English
تدمد: 1726-4189
1726-4170
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b317cf68253485c75b867b7a18dde7bb
http://www.biogeosciences.net/10/4465/2013/bg-10-4465-2013.pdf
حقوق: OPEN
رقم الأكسشن: edsair.doi.dedup.....b317cf68253485c75b867b7a18dde7bb
قاعدة البيانات: OpenAIRE