Sökning: onr:"swepub:oai:DiVA.org:su-151402" > Carbon cycling on t...
Fältnamn | Indikatorer | Metadata |
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000 | 03996naa a2200421 4500 | |
001 | oai:DiVA.org:su-151402 | |
003 | SwePub | |
008 | 180111s2017 | |||||||||||000 ||eng| | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1514022 URI |
024 | 7 | a https://doi.org/10.5194/bg-2017-1152 DOI |
040 | a (SwePub)su | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Gustafsson, Eriku Stockholms universitet,Baltic Nest Institute4 aut0 (Swepub:su)ergus |
245 | 1 0 | a Carbon cycling on the East Siberian Arctic Shelf – a change in air-sea CO2 flux induced by mineralization of terrestrial organic carbon |
264 | 1 | b Copernicus GmbH,c 2017 |
338 | a print2 rdacarrier | |
520 | a Measurements from the SWERUS-C3 and ISSS-08 Arctic expeditions were used to calibrate and validate a new physical-biogeochemical model developed to quantify key carbon cycling processes on the East Siberian Arctic Shelf (ESAS). The model was used in a series of experimental simulations with the specific aim to investigate the pathways of terrestrial dissolved and particulate organic carbon (DOCter and POCter) supplied to the shelf. Rivers supply on average 8.5 Tg C yr−1 dissolved inorganic carbon (DIC), and further 8.5 and 1.1 Tg C yr−1 DOCter and POCter respectively. Based on observed and simulated DOC concentrations and stable isotope values (δ13CDOC) in shelf waters, we estimate that only some 20 % of the riverine DOCter is labile. According to our model results, an additional supply of approximately 14 Tg C yr−1 eroded labile POCter is however required to describe the observed stable isotope values of DIC (δ13CDIC). Degradation of riverine DOCter and POCter results in a 1.8 Tg C yr−1 reduction in the uptake of atmospheric CO2, while degradation of eroded POCter results in an additional 10 Tg C yr−1 reduction. Our calculations indicate nevertheless that the ESAS is an overall small net sink for atmospheric CO2 (1.7 Tg C yr−1). The external carbon sources are largely compensated by a net export from the shelf to the Arctic Ocean (31 Tg C yr−1), and to a smaller degree by a permanent burial in the sediments (2.7 Tg C yr−1). | |
650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskap0 (SwePub)1052 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciences0 (SwePub)1052 hsv//eng |
700 | 1 | a Humborg, Christophu Stockholms universitet,Stockholms universitets Östersjöcentrum,Institutionen för miljövetenskap och analytisk kemi4 aut0 (Swepub:su)christop |
700 | 1 | a Björk, Göran4 aut |
700 | 1 | a Stranne, Christianu Stockholms universitet,Institutionen för geologiska vetenskaper,University of New Hampshire, USA4 aut0 (Swepub:su)chstr |
700 | 1 | a Andersson, Leif G.4 aut |
700 | 1 | a Geibel, Marc C.u Stockholms universitet,Stockholms universitets Östersjöcentrum,Institutionen för miljövetenskap och analytisk kemi4 aut0 (Swepub:su)mgeib |
700 | 1 | a Mörth, Carl-Magnusu Stockholms universitet,Institutionen för geologiska vetenskaper4 aut0 (Swepub:su)morth |
700 | 1 | a Sundbom, Marcusu Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi4 aut0 (Swepub:su)marcs |
700 | 1 | a Semiletov, Igor P.4 aut |
700 | 1 | a Thornton, Brett F.u Stockholms universitet,Institutionen för geologiska vetenskaper4 aut0 (Swepub:su)brtho |
700 | 1 | a Gustafsson, Bo G.u Stockholms universitet,Baltic Nest Institute4 aut0 (Swepub:su)bogu |
710 | 2 | a Stockholms universitetb Baltic Nest Institute4 org |
773 | 0 | t Biogeosciencesd : Copernicus GmbHx 1726-4170x 1726-4189 |
856 | 4 | u https://doi.org/10.5194/bg-2017-115y Fulltext |
856 | 4 | u https://www.biogeosciences-discuss.net/bg-2017-115/bg-2017-115.pdf |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-151402 |
856 | 4 8 | u https://doi.org/10.5194/bg-2017-115 |
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