Cristin-resultat-ID: 1496051
Sist endret: 22. januar 2018, 14:46
NVI-rapporteringsår: 2017
Vitenskapelig artikkel

Arctic Intermediate Water in the Nordic Seas, 1991-2009

  • Emil Jeansson
  • Are Olsen og
  • Sara Jutterström


Deep Sea Research Part I: Oceanographic Research Papers
ISSN 0967-0637
e-ISSN 1879-0119
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2017
Publisert online: 2017
Trykket: 2017
Volum: 128
Sider: 82 - 97


Scopus-ID: 2-s2.0-85028894612

Beskrivelse Beskrivelse


Arctic Intermediate Water in the Nordic Seas, 1991-2009


The evolution of the different types of Arctic Intermediate Water (AIW) in the Nordic Seas is evaluated and compared utilising hydro-chemical data from 1991 to 2009. It has been suggested that these waters are im- portant components of the Norwegian Sea Arctic Intermediate Water (NSAIW), and of the dense overflows to the North Atlantic. Thus, it is important to understand how their properties and distribution vary with time. The AIWs from the Greenland and Iceland Seas, show different degrees of variability during the studied period; however, only the Greenland Sea Arctic Intermediate Water (GSAIW) shows an increasing temperature and salinity throughout the 2000s, which considerably changed the properties of this water mass. Optimum multi- parameter (OMP) analysis was conducted to assess the sources of the NSAIW. The analysis shows that the Iceland Sea Arctic Intermediate Water (ISAIW) and the GSAIW both contribute to NSAIW, at different densities corre- sponding to their respective density range. This illustrates that they flow largely isopycnally from their source regions to the Norwegian Sea. The main source of the NSAIW, however, is the upper Polar Deep Water, which explains the lower concentrations of oxygen and chlorofluorocarbons, and higher salinity and nutrient con- centrations of the NSAIW layer compared with the ISAIW and GSAIW. This shows how vital it is to include chemical tracers in any water mass analysis to correctly assess the sources of the water mass being studied.


Emil Jeansson

  • Tilknyttet:
    ved NORCE Klima og miljø ved NORCE Norwegian Research Centre AS

Are Olsen

  • Tilknyttet:
    ved Geofysisk institutt ved Universitetet i Bergen

Sara Jutterström

  • Tilknyttet:
    ved IVL Svenska Miljöinstitutet AB
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