Change search
ReferencesLink to record
Permanent link

Direct link
A model sensitivity study for the sea-air exchange of methane in the Laptev Sea, Arctic Ocean
SMHI, Research Department, Oceanography.
SMHI, Research Department, Oceanography.ORCID iD: 0000-0003-1068-746X
2014 (English)In: Tellus. Series B, Chemical and physical meteorology, ISSN 0280-6509, E-ISSN 1600-0889, Vol. 66, 24174Article in journal (Refereed) Published
Abstract [en]

The ocean's sinks and sources determine the concentration of methane in the water column and by that regulating the emission of methane to the atmosphere. In this study, we investigate how sensitive the sea-air exchange of methane is to increasing/decreasing sinks and sources as well as changes of different drivers with a time-dependent biogeochemical budget model for one of the shallow shelf sea in the Siberian Arctic, the Laptev Sea. The applied changes are: increased air temperature, river discharge, wind, atmospheric methane, concentration of nutrients in the river runoff or flux of methane from the sediment. Furthermore, simulations are performed to examine how the large range in observations for methane concentration in the Lena River as well as the rate of oxidation affects the net sea-air exchange. In addition, a simulation with five of these changes applied together was carried out to simulate expected climate change at the end of this century. The result indicates that none of the simulations changed the seawater to becoming a net sink for atmospheric methane and all simulations except three increased the outgassing to the atmosphere. The three exceptions were: doubling the atmospheric methane, decreasing the rivers' concentration of methane and increasing the oxidation rate where the latter is one of the key mechanisms controlling emission of methane to the atmosphere.

Place, publisher, year, edition, pages
2014. Vol. 66, 24174
Keyword [en]
Arctic Ocean, Laptev Sea, methane, carbon, sea-air exchange, modelling
National Category
Oceanography, Hydrology, Water Resources
Research subject
Oceanography
Identifiers
URN: urn:nbn:se:smhi:diva-140DOI: 10.3402/tellusb.v66.24174ISI: 000343869400001OAI: oai:DiVA.org:smhi-140DiVA: diva2:801340
Available from: 2015-04-09 Created: 2015-03-26 Last updated: 2016-11-22Bibliographically approved

Open Access in DiVA

fulltext(1669 kB)4 downloads
File information
File name FULLTEXT01.pdfFile size 1669 kBChecksum SHA-512
1c982451e18d34477b2265188fc0515d353e9e7be053311a1247b042107cf3e7a0e9f0bf8e863a49a8ba7c47b44bf1c2bf5fcbd52ce7030054310c1bfd5a1d9b
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Wåhlstrom, IreneMeier, Markus
By organisation
Oceanography
In the same journal
Tellus. Series B, Chemical and physical meteorology
Oceanography, Hydrology, Water Resources

Search outside of DiVA

GoogleGoogle Scholar
Total: 4 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 11 hits
ReferencesLink to record
Permanent link

Direct link