SVINØY SECTIONSVINØY SECTIONA full-scale ocean climate laboratory in the A full-scale ocean climate laboratory in the Norwegian Atlantic CurrentNorwegian Atlantic Current

Warming of the Atlantic Inflow to the Norwegian Sea toward Arctic; 1995-2005 by

Kjell Arild Orvik and Øystein SkagsethGeophysical Inst., University of Bergen, and Marine Research Inst., Bergen

Outline- What causes the extreme warming- Connect it to dynamical processes in the North Atlantic- Strength of the Sub-Polar Gyre and interaction of water masses- Moored temp/current measurements the in Svinøy Section- Sea Surface High (SSH) observations from satellite altimeter- Empirical Orthogonal functions (EOF) methodology

Major Pathways of Atlantic Water and extension of Atlantic Water inNorth Atlantic &Norwegin Sea, from SVP-drifters

Orvik & Niiler, GRL 2002

Vertically integrated transport of Atlantic InflowOrvik, Skagseth & Mork, DSR 2001Orvik & Skagseth, CSR 2003

Temperature,Velocity & Heat-flux variations in the core of the AI

Orvik & Skagseth, GRL 2005

Timeseries of vT variationsConnected to variarions inV and TOrvik & Skagseth,GRL 2005

EOF-mode 2: 13.4 % of Variance

Hakkinen & Rhines, 2004

Sea Surface High (SSH) fromTOPEX/Poseidon altimeter.1/3 deg resolution1-year mv-filter

Time series of v and T in Svinøy Section updated to 2006 have been removed from thepresentation, contact the author if you need further details

CONCLUSION

The warming of the Atlantic Inflow to the Norwegian Sea toward the Arctic Ocean 1995-2005 appears to be determined by the dynamic processes in the North Atlantic

EOF-mode 1: 43.9 % of Variance

Hakkinen & Rhines, 2004

Sea Surface High (SSH) fromTOPEX/Poseidon altimeter.1/3 deg resolution1-year mv-filter