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Shipborne eddy cova...
Shipborne eddy covariance observations of methane fluxes constrain Arctic sea emissions
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- Thornton, Brett F. (författare)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Prytherch, John (författare)
- Stockholms universitet,Meteorologiska institutionen (MISU)
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- Andersson, Kristian (författare)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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Brook, Ian M. (författare)
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Salisbury, Dominic (författare)
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- Tjernström, Michael (författare)
- Stockholms universitet,Meteorologiska institutionen (MISU)
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- Crill, Patrick M. (författare)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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(creator_code:org_t)
- American Association for the Advancement of Science (AAAS), 2020
- 2020
- Engelska.
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Ingår i: Science Advances. - : American Association for the Advancement of Science (AAAS). - 2375-2548. ; 6:5
- Relaterad länk:
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https://doi.org/10.1...
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https://advances.sci...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We demonstrate direct eddy covariance (EC) observations of methane (CH4) fluxes between the sea and atmosphere from an icebreaker in the eastern Arctic Ocean. EC-derived CH4 emissions averaged 4.58, 1.74, and 0.14 mg m(-2) day(-1) in the Laptev, East Siberian, and Chukchi seas, respectively, corresponding to annual sea-wide fluxes of 0.83, 0.62, and 0.03 Tg year(-1) . These EC results answer concerns that previous diffusive emission estimates, which excluded bubbling, may underestimate total emissions. We assert that bubbling dominates sea-air CH4 fluxes in only small constrained areas: A similar to 100-m(2) area of the East Siberian Sea showed sea-air CH4 fluxes exceeding 600 mg m(-2) day(-1); in a similarly sized area of the Laptev Sea, peak CH4 fluxes were similar to 170 mg m(-2) day(-1). Calculating additional emissions below the noise level of our EC system suggests total ESAS CH4 emissions of 3.02 Tg year(-1) closely matching an earlier diffusive emission estimate of 2.9 Tg year(-1).
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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