Variability in ice phenology on Great Bear Lake and Great Slave Lake, Northwest Territories, Canada, from SeaWinds/QuikSCAT: 2000-2006.

Abstract The temporal evolution of the backscatter coefficient, sigma-nought (σ°) from QuikSCAT was evaluated for monitoring ice phenology on Great Bear Lake (66°N, 121°W) and Great Slave Lake (61°40′N, 114°W), Northwest Territories, Canada. Results indicated that σ° from QuikSCAT can be used to detect melt onset, water clear of ice and freeze onset dates on both lakes. An ice phenology algorithm was then developed to assess the spatiotemporal variability on both lakes from QuikSCAT for the period 2000–2006. Results showed that for Great Slave Lake, the average melt onset date occurred on year day (YD) 123, the average water clear of ice date was on YD164, and the average freeze onset date was on YD330. On Great Bear Lake, the average melt onset date occurred on YD139, the average water clear of ice date was YD191, and the average freeze onset date was YD321. Ice cover remained present for at least five weeks longer on Great Bear Lake than on Great Slave Lake and most of the difference can be explained by earlier ice melt on Great Slave Lake. Spatially, on Great Bear Lake, melt onset took place first in the eastern arm, water clear of ice occurred first in southeastern and western arms, and freeze onset appeared first in the northern arm and along the shorelines. On Great Slave Lake, melt onset began first in the central basin and then progressed to the northern and eastern arms later in the season. The central basin of Great Slave Lake cleared earlier than the periphery due to the discharge from the Slave River. Freeze onset on Great Slave Lake occurred first within the east arm, closely followed by the north and west arms, and then finally in the centre of the main basin.

[1]  R. Assel,et al.  Recent Trends In Laurentian Great Lakes Ice Cover , 2003 .

[2]  Jeffrey R. Key,et al.  Arctic Surface, Cloud, and Radiation Properties Based on the AVHRR Polar Pathfinder Dataset. Part I: Spatial and Temporal Characteristics , 2005 .

[3]  R. Latifovic,et al.  Analysis of climate change impacts on lake ice phenology in Canada using the historical satellite data record , 2007 .

[4]  Randolph H. Wynne,et al.  Global patterns of lake ice phenology and climate' Model simulations and observations , 1998 .

[5]  Jeffrey R. Key,et al.  Arctic Surface, Cloud, and Radiation Properties Based on the AVHRR Polar Pathfinder Dataset. Part II: Recent Trends , 2005 .

[6]  J. Key,et al.  Expected uncertainty in satellite-derived estimates of the surface radiation budget at high latitudes , 1997 .

[7]  Fawwaz T. Ulaby,et al.  The active and passive microwave response to snow parameters: 1. Wetness , 1980 .

[8]  W. F. Weeks,et al.  Ice processes and growth history on Arctic and sub-Arctic lakes using ERS-1 SAR data , 1995, Polar Record.

[9]  D. Schindler,et al.  Effects of Climatic Warming on Lakes of the Central Boreal Forest , 1990, Science.

[10]  J. Key,et al.  Estimating the cloudy-sky albedo of sea ice and snow from space , 2001 .

[11]  J. Magnuson,et al.  Historical trends in lake and river ice cover in the northern hemisphere , 2000, Science.

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

[13]  Dorothy K. Hall,et al.  Analysis of ERS 1 synthetic aperture radar data of frozen lakes in northern Montana and implications for climate studies , 1994 .

[14]  Claude R. Duguay,et al.  RADARSAT backscatter characteristics of ice growing on shallow sub‐Arctic lakes, Churchill, Manitoba, Canada , 2002 .

[15]  David G. Long,et al.  Resolution enhancement of spaceborne scatterometer data , 1993, IEEE Trans. Geosci. Remote. Sens..

[16]  J. Key,et al.  Expected errors in satellite-derived estimates of the high latitude surface radiation budget , 1996, IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium.

[17]  Donald J. Cavalieri,et al.  Deriving long‐term time series of sea ice cover from satellite passive‐microwave multisensor data sets , 1999 .

[18]  J. Key,et al.  Tools for Atmospheric Radiative Transfer: Streamer and FluxNet. Revised , 1998 .

[19]  Claude R. Duguay,et al.  Simulation of ice phenology on Great Slave Lake, Northwest Territories, Canada , 2002 .

[20]  Claude R. Duguay,et al.  Impacts of large-scale teleconnections on freshwater-ice break/freeze-up dates over Canada , 2006 .

[21]  Hiroyuki Wakabayashi,et al.  Structural and stratigraphie features and ERS 1 synthetic aperture radar backscatter characteristics of ice growing on shallow lakes in NW Alaska, winter 1991–1992 , 1994 .

[22]  P. Blanken,et al.  Interannual Variability of the Thermal Components and Bulk Heat Exchange of Great Slave Lake , 2008 .

[23]  J. Magnuson,et al.  Lake ice records used to detect historical and future climatic changes , 1992 .

[24]  Benoit Rivard,et al.  Melt season duration on Canadian Arctic ice caps, 2000–2004 , 2005 .

[25]  Charles Fowler,et al.  Spatial and temporal variability of satellite-derived cloud and surface characteristics during FIRE-ACE , 2001 .

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

[27]  A. Kouraev,et al.  Observations of Lake Baikal ice from satellite altimetry and radiometry , 2007 .

[28]  Benoit Rivard,et al.  Melt season duration and ice layer formation on the Greenland ice sheet, 2000–2004 , 2007 .

[29]  David G. Barber,et al.  Melt ponds on sea ice in the Canadian Archipelago: 2. On the use of RADARSAT‐1 synthetic aperture radar for geophysical inversion , 2000 .

[30]  Jay A. Austin,et al.  Lake Superior summer water temperatures are increasing more rapidly than regional air temperatures: A positive ice‐albedo feedback , 2007 .

[31]  David G. Long,et al.  Image reconstruction and enhanced resolution imaging from irregular samples , 2001, IEEE Trans. Geosci. Remote. Sens..

[32]  Randall K. Scharien,et al.  Analysis of surface roughness and morphology of first-year sea ice melt ponds: implications for microwave scattering , 2005, IEEE Transactions on Geoscience and Remote Sensing.

[33]  T. J. Pultz,et al.  Analysis of multi-temporal ERS-1 SAR data of subarctic tundra and forest in the Northern Hudson Bay Lowland and implications for climate studies , 1999 .

[34]  Stephen E. L. Howell,et al.  Application of a SeaWinds/QuikSCAT sea ice melt algorithm for assessing melt dynamics in the Canadian Arctic Archipelago , 2006 .

[35]  Peter D. Blanken,et al.  Over-Lake Meteorology and Estimated Bulk Heat Exchange of Great Slave Lake in 1998 and 1999 , 2003 .

[36]  C. Duguay,et al.  River-ice break-up/freeze-up: a review of climatic drivers, historical trends and future predictions , 2007, Annals of Glaciology.

[37]  Claude R. Duguay,et al.  Recent trends in Canadian lake ice cover , 2006 .

[38]  Stephen E. L. Howell,et al.  On the utility of SeaWinds/QuikSCAT data for the estimation of the thermodynamic state of first-year sea ice , 2005, IEEE Transactions on Geoscience and Remote Sensing.

[39]  L. Martz,et al.  Science Meets Traditional Knowledge: Water and Climate in the Sahtu (Great Bear Lake) Region, Northwest Territories, Canada , 2009 .

[40]  Chris Derksen,et al.  Detection of pan-Arctic terrestrial snowmelt from QuikSCAT, 2000–2005 , 2008 .

[41]  Xuanji Wang,et al.  Recent Trends in Arctic Surface, Cloud, and Radiation Properties from Space , 2003, Science.

[42]  Claude R. Duguay,et al.  Determining depth and ice thickness of shallow sub-Arctic lakes using space-borne optical and SAR data , 2003 .