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Ice export from the Laptev and East Siberian Sea derived from delta O-18 values
Swedish Museum Nat Hist, Dept Geosci, S-10405 Stockholm, Sweden.;Stockholm Univ, Dept Environm Sci & Analyt Chem, S-10691 Stockholm, Sweden..
Swedish Museum Nat Hist, Dept Geosci, S-10405 Stockholm, Sweden..
Stockholm Univ, Dept Environm Sci & Analyt Chem, S-10691 Stockholm, Sweden.;Norwegian Environm Agcy, Oslo, Norway..
Stockholm Univ, Dept Geol Sci, S-10691 Stockholm, Sweden..
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2015 (Engelska)Ingår i: Journal of Geophysical Research - Oceans, ISSN 2169-9275, E-ISSN 2169-9291, Vol. 120, nr 9, s. 5997-6007Artikel i tidskrift (Refereegranskat) Published
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Abstract [en]

Ice export from the vast Arctic Siberian shelf is calculated using O-18 values and salinity data for water samples collected during the International Siberian Shelf Study between August and September 2008 (ISSS-08). The samples represent a wide range of salinities and O-18 values due to river water inputs and sea ice removal. We estimate the fraction of water that has been removed as ice by interpreting observed O-18 values and salinities as a result of mixing between river water and sea water end-members as well as to fractional ice removal. This method does not assume an ice end-member of fixed composition, which is especially important when applied on samples with large differences in salinity. The results show that there is net transport of ice from both the Laptev and the Eastern Siberian Seas, and in total 3000 km(3) of sea ice is exported from the shelf. The annual total export of ice from the entire region, calculated from the residence time of water on the shelf, is estimated to be 860 km(3) yr(-1). Thus, changes in ice production on the shelf may have great impact on sea ice export from the Arctic Ocean.

Ort, förlag, år, upplaga, sidor
2015. Vol. 120, nr 9, s. 5997-6007
Nyckelord [en]
Arctic oceanography, stable isotopes, sea ice, Siberian shelfs
Forskningsämne
SWEDARCTIC; SWEDARCTIC 2008, ISSS-08
Identifikatorer
URN: urn:nbn:se:polar:diva-2551DOI: 10.1002/2015JC010866ISI: 000363470300007OAI: oai:DiVA.org:polar-2551DiVA, id: diva2:882215
Tillgänglig från: 2015-12-14 Skapad: 2015-12-14 Senast uppdaterad: 2017-12-01

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