title: Toward a statistical description of methane emissions from arctic wetlands.
abstract: Methane (CH4) emissions from arctic tundra typically follow relations with soil temperature and water table depth, but these process-based descriptions can be difficult to apply to areas where no measurements exist. We formulated a description of the broader temporal flux pattern in the growing season based on two distinct CH4source components from slow and fast-turnover carbon. We used automatic closed chamber flux measurements from NE Greenland (74°N), W Greenland (64°N), and Svalbard (78°N) to identify and discuss these components. The temporal separation was well-suited in NE Greenland, where the hypothesized slow-turnover carbon peaked at a time significantly related to the timing of snowmelt. The temporally wider component from fast-turnover carbon dominated the emissions in W Greenland and Svalbard. Altogether, we found no dependence of the total seasonal CH4budget to the timing of snowmelt, and warmer sites and years tended to yield higher CH4emissions.
authors.affiliation: Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, 22362, Lund, Sweden. norbert.pirk@nateko.lu.se.
authors.forename: Norbert
authors.initials: N
authors.lastname: Pirk
authors.affiliation: Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, 22362, Lund, Sweden.
authors.forename: Mikhail
authors.initials: M
authors.lastname: Mastepanov
authors.affiliation: Department of Bioscience, Arctic Research Centre, Aarhus University, Frederiksborgvej 399, 4000, Roskilde, Denmark.
authors.forename: Efrén
authors.initials: E
authors.lastname: López-Blanco
authors.affiliation: , Qatserisut 8, 3900, Nuuk, Greenland.
authors.forename: Louise H
authors.initials: LH
authors.lastname: Christensen
authors.affiliation: Arctic Geology Department, The University Centre in Svalbard, UNIS, P.O. Box 156, 9171, Longyearbyen, Norway.
authors.forename: Hanne H
authors.initials: HH
authors.lastname: Christiansen
authors.affiliation: Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350, Copenhagen K, Denmark.
authors.forename: Birger Ulf
authors.initials: BU
authors.lastname: Hansen
authors.affiliation: Department of Bioscience, Arctic Research Centre, Aarhus University, Frederiksborgvej 399, 4000, Roskilde, Denmark.
authors.forename: Magnus
authors.initials: M
authors.lastname: Lund
authors.affiliation: Norwegian Institute of Bioeconomy Research, Høyskoleveien 7, 1430, Ås, Norway.
authors.forename: Frans-Jan W
authors.initials: FW
authors.lastname: Parmentier
authors.affiliation: Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350, Copenhagen K, Denmark.
authors.forename: Kirstine
authors.initials: K
authors.lastname: Skov
authors.affiliation: Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, 22362, Lund, Sweden.
authors.forename: Torben R
authors.initials: TR
authors.lastname: Christensen
mesh_terms: D001110:Arctic Regions; D057486:Carbon Cycle; D057231:Climate Change; D064308:Ecological Parameter Monitoring / Q000295:instrumentation / Q000379:methods; D006116:Greenland; D008697:Methane / Q000032:analysis*; D012621:Seasons; D012914:Snow; D065929:Tundra; D053833:Wetlands
chemical_list: D008697:Methane
keywords: Emission; Greenland; Methane; Svalbard; Tundra