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Temporal variations in the stable carbon isotopic composition of methane emitted from Minnesota peatlands
Author(s) -
Kelly Cheryl A.,
Dise Nancy B.,
Martens Christopher S.
Publication year - 1992
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/92gb01478
Subject(s) - bog , peat , methane , environmental science , carex , atmospheric methane , carbon fibers , water table , atmospheric sciences , snow , range (aeronautics) , carbon cycle , environmental chemistry , δ13c , wetland , hydrology (agriculture) , stable isotope ratio , chemistry , ecology , geology , groundwater , ecosystem , geomorphology , materials science , physics , geotechnical engineering , organic chemistry , quantum mechanics , composite number , composite material , biology
The stable carbon isotopic composition of methane (δ 13 C) emitted from two peatland sites in the Marcell Experimental Forest in northern Minnesota was investigated during the snow‐free season of 1989–1990. A seasonal range in δ 13 C values of 13‰ was seen for a forested bog with heavier ( 13 C enriched) methane emitted during the wanner summer months. This shift was correlated with water table level suggesting control by microbial oxidation. Methane from a nearby poor fen transitional to bog dominated by Carex oligosperma showed a similar temporal trend but with a much smaller range of 5‰ during the same time period and with no water table level correlation. The methane emitted from the fen was consistently heavier than that emitted by the bog.