Institute of Oceanology PAS In the Arctic Jan Piechura Arctic GOOS Planning Meeting NERSC, Bergen Sep. 2006

IOPAS STATIONS GRID ArcticGOOS, Bergen, 2006 Measurements At High Seas and Shelf: Standard meteo, aerosols CTD, ADCP (VMADCP and LADCP) Solar radiation, light day attenuation Organic carbon, organic matter Primary production Plankton: phyto, zoo Birds count At Svalbard Fiords (additionaly): High resolution CTD and ADCP Suspended matter sedimentation Plankton: phyto, zoo, bentos Gas bubbles in the water

IO PAS STATIONS PLANNED IN DAMOCLES ArcticGOOS, Bergen, 2006

June- July 2005 ADCP measured currents at 100 m. Geostrophic currents Geostrophic flow Kinetic Energy (color scale) Two KE maxima (core, western branch); Convergence of two streams at ~78º N; Recirculation at ~78º and ~79º Large anticyclonic eddy at ~73º 30’ Meandering of the western branch SOME RESULTS ArcticGOOS, Bergen, 2006

TWO AW TRANSPORT MAXIMA (CORE, WESTERN BRANCH); SOUTHWARD FLOW REGION BETWEEN BRANCHES; CONVERGENCE OF TWO STREAMS AT ~78º N; DIVERGENCE OF STREAMS AT ~79º N; THE EASTERN BRANCH (CORE OF WSC) INFLOWS INTO THE ARCTIC OCEAN, THE WESTERN ONE MOSTLY RECIRCULATES EXAMPLE: PATHWAYS OF ATLANTIC WATER - STRUCTURE VERTICALLY INTEGRATED TRANSPORTS OF ATLANTIC WATER ACROSS SECTIONS Summer 2005 ArcticGOOS, Bergen, 2006

EXAMPLE : PROPERTIES OF ATLANTIC WATER - VARIABILITY AW LAYER HEATR CONTENT AND BAROCLINIC CURRENTS ANOMALIES FROM MEAN NEGATIVE AW HEAT CONTENT ANOMALY 2004 – HIGHER HEAT CONTENT 2005 THE HIGHEST HEAT CONTENT, LARGE HEAT ANOMALIES CARRIED BY THE MESOSCALE EDDIES IN THE WESTERN BRANCH POSITIVE HEAT ANOMALIES CARRIED BY THE ANICYCLONIC EDDIES ArcticGOOS, Bergen, 2006

EXAMPLE : TEMPERATURE AT 100m DEPTH

Variability of mean temperature, salinity and heat transport of Atlantic Water at Latitude 76o30'N ArcticGOOS, Bergen, 2006