Observations of Recent Arctic Sea Ice Volume Loss and Its Impact on Ocean-Atmosphere Energy Exchange and Ice Production

[1] Using recently developed techniques we estimate snow and sea ice thickness distributions for the Arctic basin through the combination of freeboard data from the Ice, Cloud, and land Elevation Satellite (ICESat) and a snow depth model. These data are used with meteorological data and a thermodynamic sea ice model to calculate ocean-atmosphere heat exchange and ice volume production during the 2003–2008 fall and winter seasons. The calculated heat fluxes and ice growth rates are in agreement with previous observations over multiyear ice. In this study, we calculate heat fluxes and ice growth rates for the full distribution of ice thicknesses covering the Arctic basin and determine the impact of ice thickness change on the calculated values. Thinning of the sea ice is observed which greatly increases the 2005–2007 fall period ocean-atmosphere heat fluxes compared to those observed in 2003. Although there was also a decline in sea ice thickness for the winter periods, the winter time heat flux was found to be less impacted by the observed changes in ice thickness. A large increase in the net Arctic ocean-atmosphere heat output is also observed in the fall periods due to changes in the areal coverage of sea ice. The anomalously low sea ice coverage in 2007 led to a net ocean-atmosphere heat output approximately 3 times greater than was observed in previous years and suggests that sea ice losses are now playing a role in increasing surface air temperatures in the Arctic.

[1]  Seymour W. Laxon,et al.  Five years of Arctic sea ice freeboard measurements from the Ice, Cloud and land Elevation Satellite , 2009 .

[2]  Walter B. Tucker,et al.  Thin and thinner: Sea ice mass balance measurements during SHEBA , 2003 .

[3]  Ron Kwok,et al.  Ice, Cloud, and land Elevation Satellite (ICESat) over Arctic sea ice: Retrieval of freeboard , 2007 .

[4]  Ron Kwok,et al.  Thinning and volume loss of the Arctic Ocean sea ice cover: 2003–2008 , 2009 .

[5]  W. Emery,et al.  A younger, thinner Arctic ice cover: Increased potential for rapid, extensive sea‐ice loss , 2007 .

[6]  Vladimir F. Radionov,et al.  Snow Depth on Arctic Sea Ice , 1999 .

[7]  Julien Boé,et al.  Current GCMs’ Unrealistic Negative Feedback in the Arctic , 2009 .

[8]  A. Semtner.  A MODEL FOR THE THERMODYNAMIC GROWTH OF SEA ICE IN NUMERICAL INVESTIGATIONS OF CLIMATE , 1975 .

[9]  C. Symon,et al.  Arctic climate impact assessment , 2005 .

[10]  Ron Kwok,et al.  ICESat over Arctic sea ice: Estimation of snow depth and ice thickness , 2008 .

[11]  Steven A. Ackerman,et al.  Cloud Detection with MODIS. Part II: Validation , 2008 .

[12]  W. Krabill,et al.  Estimation of sea ice thickness distributions through the combination of snow depth and satellite laser altimetry data , 2009 .

[13]  P. Rasch,et al.  Description of the NCAR community climate model (CCM2), June 1993. Technical note , 1993 .

[14]  G. König‐Langlo,et al.  Meteorological observations from ship cruises during summer to the central Arctic: A comparison with reanalysis data , 2010 .

[15]  W. Weeks,et al.  Observations on the Physical Properties of Sea-Ice at Hopedale, Labrador , 1958 .

[16]  G. Maykut,et al.  Numerical Prediction of the Thermodynamic Response of Arctic Sea Ice to Environmental Changes , 1969 .

[17]  H. Zwally.  ICESat's Laser Measurements of Polar Ice and Atmospheres , 2003 .

[18]  J. Wallace,et al.  Response of Sea Ice to the Arctic Oscillation , 2002 .

[19]  Thomas Meissner,et al.  AMSR Ocean Algorithm , 2000 .

[20]  C. Donlon,et al.  OSTIA : An operational, high resolution, real time, global sea surface temperature analysis system , 2007, OCEANS 2007 - Europe.

[21]  Jeffrey Miller,et al.  Comparison of ICESat Data With Airborne Laser Altimeter Measurements Over Arctic Sea Ice , 2007, IEEE Transactions on Geoscience and Remote Sensing.

[22]  Josefino C. Comiso,et al.  Accelerated decline in the Arctic sea ice cover , 2008 .

[23]  J. Francis,et al.  The Arctic Amplification Debate , 2006 .

[24]  P. E. Church,et al.  Radiation Climate of Barrow Alaska, 1962–66 , 1973 .

[25]  Donald K. Perovich,et al.  The role of shortwave radiation in the summer decay of a sea ice cover , 1987 .

[26]  Donald J. Cavalieri,et al.  On sea ice drift from the wavelet analysis of the Defense Meteorological Satellite Program (DMSP) Special Sensor Microwave Imager (SSM/I) data , 1998 .

[27]  M. Holland,et al.  The emergence of surface-based Arctic amplification , 2008 .

[28]  Jeffrey R. Key,et al.  Evaluation of surface radiative flux parameterizations for use in sea ice models , 1996 .

[29]  G. Maykut.  Energy exchange over young sea ice in the central Arctic , 1978 .

[30]  Gary A. Maykut,et al.  Large‐scale heat exchange and ice production in the central Arctic , 1982 .

[31]  J. Stroeve,et al.  Recent changes in Arctic sea ice melt onset, freezeup, and melt season length , 2009 .

[32]  R. Woodgate,et al.  The 2007 Bering Strait oceanic heat flux and anomalous Arctic sea‐ice retreat , 2010 .

[33]  Peter Wadhams,et al.  Relationship between sea ice freeboard and draft in the Arctic Basin, and implications for ice thickness monitoring , 1992 .

[34]  Julienne C. Stroeve,et al.  Arctic Sea Ice Extent Plummets in 2007 , 2008 .

[35]  Syukuro Manabe,et al.  Sensitivity of a global climate model to an increase of CO2 concentration in the atmosphere , 1980 .

[36]  T. Laevastu.  Factors affecting the temperature of the surface layer of the sea , 1960 .

[37]  Seymour W. Laxon,et al.  Circumpolar thinning of Arctic sea ice following the 2007 record ice extent minimum , 2008 .

[38]  P. Guest,et al.  Measurements near the Atmospheric Surface Flux Group tower at SHEBA: Near‐surface conditions and surface energy budget , 2002 .

[39]  Alan K. Betts,et al.  Evaluation of the diurnal cycle of precipitation, surface thermodynamics, and surface fluxes in the ECMWF model using LBA data , 2002 .

[40]  W. Washington,et al.  A large-scale numerical model of sea ice , 1979 .

[41]  C. Pease,et al.  The size of wind‐driven coastal polynyas , 1987 .

[42]  D. Perovich,et al.  Thermal conductivity and heat transfer through the snow on the ice of the Beaufort Sea , 2002 .

[43]  R. Lindsay.  Temporal Variability of the Energy Balance of Thick Arctic Pack Ice , 1998 .

[44]  Michael Steele,et al.  Retreat of the cold halocline layer in the Arctic Ocean , 1998 .

[45]  A. Kovacs.  Sea Ice: Part II. Estimating the Full-Scale Tensile, Flexural, and Compressive Strength of First-Year Ice, , 1996 .

[46]  Donald B. Percival,et al.  The decline in arctic sea‐ice thickness: Separating the spatial, annual, and interannual variability in a quarter century of submarine data , 2008 .

[47]  H. Zwally,et al.  Overview of ICESat's Laser Measurements of Polar Ice, Atmosphere, Ocean, and Land , 2002 .

[48]  K. Shine.  Parametrization of the shortwave flux over high albedo surfaces as a function of cloud thickness and surface albedo , 1984 .