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CT1/CT3 Meeting 22-23 April 2013 Hamburg

CT1/CT3 Meeting 22-23 April 2013 Hamburg Varaibility of the Sea ice extent and its relationship with oceanic properties. C. Herbaut, M.-N. Houssais, A.-C. Blaizot LOCEAN. Task 1.3.1 Characterize the spatial patterns of the ocean surface state (sea ice, SST)

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CT1/CT3 Meeting 22-23 April 2013 Hamburg

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  1. CT1/CT3 Meeting 22-23 April 2013 Hamburg Varaibilityof the Sea ice extent and its relationship with oceanic properties C. Herbaut, M.-N. Houssais, A.-C. Blaizot LOCEAN Task 1.3.1 Characterize the spatial patterns of the ocean surface state (sea ice, SST) variability on seasonal to decadal time scales Task 1.3.2 Link ocean surface state variability to key ocean quantities Task 1.3.3 Impact of the atmosphere on the Arctic/North Atlantic ocean surface changes

  2. Relationship between Sea Ice Area in the Barents and atlantic water properties On annual mean: SIA lags by 1 or 2 years heat transport in BSO Observations Model SIA Heat transport (BSO) SIA Temperature (BSO) Arthun et al, 2012 Arthun et al, 2012 Winter SIA in Barents Sea correlated with previous spring-summer SST Schlichtholz, 2011

  3. Objectives: To document the contribution of ocean processes to Arctic surface changes Impact of Atlantic and Pacific inflow Contribution of mesoscale eddies. Models: ¼° regional sea ice- ocean model Domain : Arctic-Atlantic (30°S). Open boundaries Embedded high resolution model of the Nordic Seas (1/16°) Simulations : Period 1958-2012 Forcing : 1958-1978:ERA40 1979-2012: ERA Interim Passive Tracers : For Atlantic Water and Pacific Water Period 1979-2012.

  4. Variability of the sea extent in the Eastern Arctic March Sea Ice extent September Sea Ice extent Autocorrelation March Sea Ice extent Autocorrelation September Sea Ice extent correlation March-September Sea Ice extent

  5. Patterns of sea ice concentration associated with the Sea ice extent varaibility March September Regression of march SIC on march sea ice extent Regression of september SIC on september sea ice extent Regression of september SIC on march sea ice extent

  6. Variability of the september sea ice extent: patterns of atmospheric forcing Summer surface heat flux Summer wind stress

  7. Variability of the september sea ice extent: patterns of associated SST Previous winter (JFM) summer (JAS) Regression of JAS SST on September sea ice extent Regression of JFM SST on September sea ice extent

  8. Variability of the march sea ice extent: patterns of atmospheric forcing Winter wind stress Winter surface heat flux

  9. Variability of the march sea ice extent: patterns of associated SST Previous summer (JAS) Previous fall (OND) Winter (JFM) Regression JFM SST on March sea ice extent Regression of JAS SST on March sea ice extent Regression of OND SST on March sea ice extent

  10. Sea ice concentration changes associated with summer heat transport through Bering Strait March September Regression of march SIC on JAS Heat Transport through Bering Strait Regression of september SIC on JAS Heat Transport through Bering Strait

  11. In progress: Origin of the temperature anomalies in the Nordic Seas? Link of Temperature in Barents Sea with Atlantic inflow at FSC and IFR Impact of the vertical processes Influence of Heat transport through Fram Strait on sea ice variability Impact on the ice thickness

  12. The research leading to these results has received funding from the European Union 7th Framework Programme (FP7 2007-2013), under grant agreement n.308299 NACLIM www.naclim.eu

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