Cristin-resultat-ID: 1496062
Sist endret: 7. januar 2019 12:53
NVI-rapporteringsår: 2018
Resultat
Vitenskapelig artikkel
2018

Inorganic Carbon and Water Masses in the Irminger Sea since 1991

Bidragsytere:
  • Friederike Fröb
  • Are Olsen
  • Fiz F. Pérez
  • María Isabel García-Ibáñez
  • Emil Jeansson
  • Abdirahman Omar
  • mfl.

Tidsskrift

Biogeosciences
ISSN 1726-4170
e-ISSN 1726-4189
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2018
Volum: 15
Hefte: 1
Sider: 51 - 72
Open Access

Importkilder

Scopus-ID: 2-s2.0-85040164193

Beskrivelse Beskrivelse

Tittel

Inorganic Carbon and Water Masses in the Irminger Sea since 1991

Sammendrag

The subpolar region in the North Atlantic is a major sink for anthropogenic carbon. While the storage rates show large interannual variability related to atmospheric forcing, less is known about variability in the natural dissolved inorganic carbon (DIC) and the combined impact of variations in the two components on the total DIC inventories. Here, data from 15 cruises in the Irminger Sea covering the 24-year period between 1991 and 2015 were used to determine changes in total DIC and its natural and anthropogenic components. Based on the results of an extended optimum multiparameter analysis (eOMP), the inventory changes are discussed in relation to the distribution and evolution of the main water masses. The inventory of DIC increased by 1.43±0.17 mol m-2 yr-1 over the period, mainly driven by the increase in anthropogenic carbon (1.84±0.16 mol m-2 yr-1) but partially offset by a loss of natural DIC (-0.57±0.22 mol m-2 yr-1). Changes in the carbon storage rate can be driven by concentration changes in the water column, for example due to the ageing of water masses, or by changes in the distribution of water masses with different concentrations either by local formation or advection. A decomposition of the trends into their main drivers showed that variations in natural DIC inventories are mainly driven by changes in the layer thickness of the main water masses, while anthropogenic carbon is most affected by concentration changes. The storage rates of anthropogenic carbon are sensitive to data selection, while changes in DIC inventory show a robust signal on short timescales associated with the strength of convection.

Bidragsytere

Friederike Fröb

  • Tilknyttet:
    Forfatter
    ved Geofysisk institutt ved Universitetet i Bergen

Are Olsen

  • Tilknyttet:
    Forfatter
    ved Geofysisk institutt ved Universitetet i Bergen

Fiz F. Pérez

  • Tilknyttet:
    Forfatter
    ved Instituto de Investigaciones Marinas de Vigo
Inaktiv cristin-person

María Isabel García Ibáñez

Bidragsyterens navn vises på dette resultatet som María Isabel García-Ibáñez
  • Tilknyttet:
    Forfatter
    ved NORCE Klima ved NORCE Norwegian Research Centre AS

Emil Jeansson

  • Tilknyttet:
    Forfatter
    ved NORCE Klima ved NORCE Norwegian Research Centre AS
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