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Efrén López-Blanco

Toward a statistical description of methane emissions from arctic wetlands

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  • Norbert Pirk, Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, 22362, Lund, Sweden. norbert.pirk@nateko.lu.se.
  • ,
  • Mikhail Mastepanov, Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, 22362, Lund, Sweden.
  • ,
  • Efrén López-Blanco
  • Louise H Christensen, , Qatserisut 8, 3900, Nuuk, Greenland.
  • ,
  • Hanne H Christiansen, Arctic Geology Department, The University Centre in Svalbard, UNIS, P.O. Box 156, 9171, Longyearbyen, Norway.
  • ,
  • Birger Ulf Hansen, Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350, Copenhagen K, Denmark.
  • ,
  • Magnus Lund
  • ,
  • Frans-Jan W Parmentier, Norwegian Institute of Bioeconomy Research, Høyskoleveien 7, 1430, Ås, Norway. frans-jan@thissideofthearctic.org.
  • ,
  • Kirstine Skov
  • Torben R Christensen

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 CH4 source 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 CH4 budget to the timing of snowmelt, and warmer sites and years tended to yield higher CH4 emissions.

Original languageEnglish
Pages (from-to)70-80
Number of pages11
Publication statusPublished - Feb 2017

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