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AGU: Geophysical Research Letters

 

Keywords

  • sea ice
  • ice albedo feedback
  • solar heating

Index Terms

  • Cryosphere: Sea ice
  • Cryosphere: Energy balance
  • Global Change: Cryospheric change

Abstract

Increasing solar heating of the Arctic Ocean and adjacent seas, 1979–2005: Attribution and role in the ice-albedo feedback

Donald K. Perovich

Cold Regions Research and Engineering Laboratory, U.S. Army Engineer Research and Development Center, Hanover, New Hampshire, USA

Bonnie Light

Polar Science Center, Applied Physics Laboratory, Seattle, Washington, USA

Hajo Eicken

Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska, USA

Kathleen F. Jones

Cold Regions Research and Engineering Laboratory, U.S. Army Engineer Research and Development Center, Hanover, New Hampshire, USA

Kay Runciman

Polar Science Center, Applied Physics Laboratory, Seattle, Washington, USA

Son V. Nghiem

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Over the past few decades the Arctic sea ice cover has decreased in areal extent. This has altered the solar radiation forcing on the Arctic atmosphere-ice-ocean system by decreasing the surface albedo and allowing more solar heating of the upper ocean. This study addresses how the amount of solar energy absorbed in areas of open water in the Arctic Basin has varied spatially and temporally over the past few decades. A synthetic approach was taken, combining satellite-derived ice concentrations, incident irradiances determined from reanalysis products, and field observations of ocean albedo over the Arctic Ocean and the adjacent seas. Results indicate an increase in the solar energy deposited in the upper ocean over the past few decades in 89% of the region studied. The largest increases in total yearly solar heat input, as much as 4% per year, occurred in the Chukchi Sea and adjacent areas.

Received 26 July 2007; accepted 12 September 2007; published 11 October 2007.

Citation: Perovich, D. K., B. Light, H. Eicken, K. F. Jones, K. Runciman, and S. V. Nghiem (2007), Increasing solar heating of the Arctic Ocean and adjacent seas, 1979–2005: Attribution and role in the ice-albedo feedback, Geophys. Res. Lett., 34, L19505, doi:10.1029/2007GL031480.

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