Toward a statistical description of methane emissions from arctic wetlands
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 seas...
| Published in: | Ambio |
|---|---|
| Main Authors: | , , , , , , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
2017
|
| Subjects: | |
| Online Access: | https://pure.au.dk/portal/da/publications/toward-a-statistical-description-of-methane-emissions-from-arctic-wetlands(c110481e-2b03-4391-abdf-a97e483b9eb2).html https://doi.org/10.1007/s13280-016-0893-3 https://pure.au.dk/ws/files/118914034/10.1007_2Fs13280_016_0893_3.pdf |
| Summary: | 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. |
|---|