Toward a statistical description of methane emissions from arctic wetlands

TY - JOUR

T1 - Toward a statistical description of methane emissions from arctic wetlands

AU - Pirk, Norbert

AU - Mastepanov, Mikhail

AU - López-Blanco, Efrén

AU - Christensen, Louise

AU - Christiansen, Hanne Hvidtfeldt

AU - Hansen, Birger

AU - Lund, Magnus

AU - Parmentier, Frans Jan W.

AU - Skov, Kirstine

AU - Christensen, Torben R.

N1 - CENPERMOA[2017]

PY - 2017

Y1 - 2017

N2 - 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.

AB - 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.

KW - Emission

KW - Greenland

KW - Methane

KW - Svalbard

KW - Tundra

U2 - 10.1007/s13280-016-0893-3

DO - 10.1007/s13280-016-0893-3

M3 - Journal article

C2 - 28116692

AN - SCOPUS:85010380422

SN - 0044-7447

VL - 46

SP - 70

EP - 80

JO - Ambio

JF - Ambio

IS - Suppl. 1

ER -