Recent changes in the exchange of sea ice between the Arctic Ocean and the Canadian Arctic Archipelago

[1] Sea ice is exchanged between the Arctic Ocean and Canadian Arctic Archipelago (CAA) but has not been quantified over long time periods. The corresponding mechanisms responsible for recent variability and change also remain unidentified. To address this, we estimated the sea ice area flux between the Arctic Ocean and the M'Clure Strait and Queen Elizabeth Islands (QEI) from 1997 to 2012 for the months of May to November. Over the period, there was a mean flux of −1 × 103 km2 (±21 × 103 km2) at the M'Clure Strait and mean flux of +8 × 103 km2 (±8 × 103 km2) at the QEI (positive and negative flux signs correspond to Arctic Ocean ice inflow and outflow, respectively). The M'Clure Strait had a mean flux of +5 × 103 km2 from May to September and a mean flux of −7 × 103 km2 from October to November. The QEI gates had a mean flux of +4 × 103 km2 from August to September with negligible ice exchange from May to July and October to November. More frequent high sea level pressure anomalies over the Beaufort Sea and Canadian Basin since 2007 have reduced Arctic Ocean multiyear ice (MYI) inflow into the M'Clure Strait. The presence of MYI in the CAA originating from the Arctic Ocean has been maintained by inflow at the QEI, which has increased since 2005. These recent increases in Arctic Ocean MYI inflow into the QEI can be attributed to increased open water area within the CAA that have provided more leeway for inflow to occur.

[1]  C. Duguay,et al.  Sea ice conditions and melt season duration variability within the Canadian Arctic Archipelago: 1979–2008 , 2009 .

[2]  R. Reynolds,et al.  The NCEP/NCAR 40-Year Reanalysis Project , 1996, Renewable Energy.

[3]  R. de Abreu,et al.  Investigating the anomalous sea-ice conditions in the Canadian High Arctic (Queen Elizabeth Islands) during summer 1998 , 2001, Annals of Glaciology.

[4]  Laurence C. Smith,et al.  New Trans-Arctic shipping routes navigable by midcentury , 2013, Proceedings of the National Academy of Sciences.

[5]  Josefino C. Comiso,et al.  Large Decadal Decline of the Arctic Multiyear Ice Cover , 2012 .

[6]  Marika M. Holland,et al.  Perspectives on the Arctic's Shrinking Sea-Ice Cover , 2007, Science.

[7]  C. Derksen,et al.  Extreme low sea ice years in the Canadian Arctic Archipelago: 1998 versus 2007 , 2010 .

[8]  J. Wallace,et al.  The Arctic oscillation signature in the wintertime geopotential height and temperature fields , 1998 .

[9]  Florence Fetterer,et al.  Whither Arctic sea ice? A clear signal of decline regionally, seasonally and extending beyond the satellite record , 2007, Annals of Glaciology.

[10]  J. Stroeve,et al.  Sea ice response to an extreme negative phase of the Arctic Oscillation during winter 2009/2010 , 2011 .

[11]  Ron Kwok,et al.  Decline in Arctic sea ice thickness from submarine and ICESat records: 1958–2008 , 2009 .

[12]  W. Emery,et al.  Distribution and trends in Arctic sea ice age through spring 2011 , 2011 .

[13]  R. Colony,et al.  Sea ice motion in response to geostrophic winds , 1982 .

[14]  R. Kwok,et al.  Contribution of melt in the Beaufort Sea to the decline in Arctic multiyear sea ice coverage: 1993–2009 , 2010 .

[15]  David G. Barber,et al.  Sea Ice Motion Tracking From Sequential Dual-Polarization RADARSAT-2 Images , 2014, IEEE Transactions on Geoscience and Remote Sensing.

[16]  H. Melling.  Sea ice of the northern Canadian Arctic Archipelago , 2002 .

[17]  Tom Hirose,et al.  Estimation of Large-Scale Sea-Ice Motion from SSM/I 85.5 GHz Imagery , 1997 .

[18]  B. Alt,et al.  A case Study of old-ice import and export through Peary and Sverdrup Channels in the Canadian Arctic Archipelago: 1998–2005 , 2006, Annals of Glaciology.

[19]  Ian Simmonds,et al.  The great Arctic cyclone of August 2012 , 2012 .

[20]  Muyin Wang,et al.  A sea ice free summer Arctic within 30 years: An update from CMIP5 models , 2012 .

[21]  D. Cavalieri,et al.  Arctic Sea Ice Variability and Trends, 1979-2006 , 2013 .

[22]  T. Agnew,et al.  The use of operational ice charts for evaluating passive microwave ice concentration data , 2003 .

[23]  Stephen E. L. Howell,et al.  Trends and variability in summer sea ice cover in the Canadian Arctic based on the Canadian Ice Service Digital Archive, 1960–2008 and 1968–2008 , 2011 .

[24]  T. Agnew,et al.  Estimating sea ice area flux across the Canadian Arctic Archipelago using enhanced AMSR‐E , 2008 .

[25]  W. Collins,et al.  The NCEP–NCAR 50-Year Reanalysis: Monthly Means CD-ROM and Documentation , 2001 .

[26]  Laurence C. Smith,et al.  Projected 21st-century changes to Arctic marine access , 2013, Climatic Change.

[27]  T. Agnew,et al.  Sea-Ice Motion and Flux within the Prince Gustaf Adolf Sea, Queen Elizabeth Islands, Canada during 2010 , 2013 .

[28]  J. Yackel,et al.  Changing sea ice melt parameters in the Canadian Arctic Archipelago: Implications for the future presence of multiyear ice , 2008 .

[29]  Ron Kwok,et al.  Exchange of sea ice between the Arctic Ocean and the Canadian Arctic Archipelago , 2006 .

[30]  P. Kushner,et al.  Variability and change in the Canadian cryosphere , 2012, Climatic Change.

[31]  J. Kay,et al.  The Arctic’s rapidly shrinking sea ice cover: a research synthesis , 2012, Climatic Change.