Cristin-resultat-ID: 1567859
Sist endret: 22. februar 2018 11:29
Resultat
Poster
2018

Methane Chemistry in the Ice Covered Arctic Ocean from Winter to Summer Time

Bidragsytere:
  • Anna Silyakova
  • Marie Pema Kotovitch
  • Delille Bruno
  • Daiki Nomura
  • Agneta Fransson
  • Melissa Chierici
  • mfl.

Årsmøte

Tittel: Ocean Sciences 2018

Sted:

Portland, USA
USA
Utbredelsesområde: Internasjonalt
Årstall: 2018
Dato fra: 11. februar 2018
Dato til: 16. februar 2018

Om resultatet

Poster
Publiseringsår: 2018

Finansiering

  • Norges forskningsråd

    • Prosjektkode: 223259
    • Prosjektkode: 223259
  • Universitetet i Tromsø

Beskrivelse Beskrivelse

Tittel

Methane Chemistry in the Ice Covered Arctic Ocean from Winter to Summer Time

Sammendrag

Methane is a powerful greenhouse gas. In the ocean, it originates from gas bearing sediments, can be produced by microorganisms in aerobic water column or released during sea ice formation in polar regions. Sea ice in the Arctic Ocean can act as a barrier for the oceanic methane to be released to the atmosphere. Thus, beneath the sea ice cover, methane can accumulate during winter time and emit in large volumes to the atmosphere when openings occur in the ice cover or when the ice starts melting. In this study we show unique data on dissolved methane concentrations in seawater and sea ice, collected during N-ICE2015 campaign that lasted from January to June 2015, with sampling from ice floes drifting in the Nansen basin, between 80 and 83°N. We found seawater methane concentrations generally 3 times higher than previously reported for the central Arctic Ocean. Elevated methane concentrations in bottom waters were only found in the area of the shallower Yermak plateau margin, where methane can potentially originate from sediments. Highest methane concentrations were found in surface waters in January north of 83° N beneath sea ice cover, showing that methane accumulates under sea ice cover in winter time. This study is funded by CAGE (Centre for Arctic Gas Hydrate, Environment and Climate), Norwegian Research Council grant no. 223259.

Bidragsytere

Anna Silyakova

  • Tilknyttet:
    Forfatter
    ved Centre for Arctic Gas Hydrate, Environment and Climate ved UiT Norges arktiske universitet
  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap ved UiT Norges arktiske universitet

marie kotovitch

Bidragsyterens navn vises på dette resultatet som Marie Pema Kotovitch
  • Tilknyttet:
    Forfatter
    ved Frankrike

Delille Bruno

  • Tilknyttet:
    Forfatter
    ved Frankrike

Daiki Nomura

  • Tilknyttet:
    Forfatter
    ved Hokkaido Daigaku

Agneta Fransson

  • Tilknyttet:
    Forfatter
    ved Norsk Polarinstitutt
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