30‐Year satellite record reveals contrasting Arctic and Antarctic decadal sea ice variability

A 30-year satellite record of sea ice extents derived mostly from satellite microwave radiometer observations reveals that the Arctic sea ice extent decreased by 0.30+0.03 x 10(exp 6) square kilometers per 10 yr from 1972 through 2002, but by 0.36 plus or minus 0.05 x 10(exp 6) square kilometers per 10yr from 1979 through 2002, indicating an acceleration of 20% in the rate of decrease. In contrast, the Antarctic sea ice extent decreased dramatically over the period 1973-1977, then gradually increased. Over the full 30-year period, the Antarctic ice extent decreased by 0.15 plus or minus 0.08 x 10(exp 6) square kilometers per 10 yr. The trend reversal is attributed to a large positive anomaly in Antarctic sea ice extent in the early 1970's, an anomaly that apparently began in the late 1960's, as observed in early visible and infrared satellite images.

[1]  R. Sabatini,et al.  Nimbus satellite data for polar ice survey , 1972, Polar Record.

[2]  John E. Walsh,et al.  Arctic Sea Ice Variability in the Context of Recent Atmospheric Circulation Trends , 2000 .

[3]  Donald J. Cavalieri,et al.  Arctic sea ice extents, areas, and trends, 1978-1996 , 1999 .

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

[5]  H. Zwally,et al.  Variability of Antarctic Sea Ice: and Changes in Carbon Dioxide , 1983, Science.

[6]  J. Walsh,et al.  Interannual atmospheric variability and associated fluctuations in Arctic Sea ice extent , 1979 .

[7]  A. Robock,et al.  Analysis of seasonal cycles in climatic trends with application to satellite observations of sea ice extent , 2002 .

[8]  Claire Parkinson Recent trend reversals in arctic sea ice extents: possible connections to the north Atlantic oscillation , 2008 .

[9]  Per Gloersen,et al.  Modulation of hemispheric sea-ice cover by ENSO events , 1995, Nature.

[10]  Roger G. Barry,et al.  Recent decreases in Arctic summer ice cover and linkages to atmospheric circulation anomalies , 1996 .

[11]  Zong-ci Zhao,et al.  Climate change 2001, the scientific basis, chap. 8: model evaluation. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change IPCC , 2001 .

[12]  R. W. James,et al.  Antarctic Sea-Ice , 1924, Nature.

[13]  Roger G. Barry,et al.  A record minimum arctic sea ice extent and area in 2002 , 2003 .

[14]  A. Carleton Antarctic sea-ice relationships with indices of the atmospheric circulation of the Southern Hemisphere , 1989 .

[15]  Seelye Martin,et al.  Variations in Surface Air Temperature Observations in the Arctic, 1979-97. , 2000 .

[16]  S. Stammerjohn,et al.  Opposing Southern Ocean Climate Patterns as Revealed by Trends in Regional Sea Ice Coverage , 1997 .

[17]  James W. Hurrell,et al.  A modulation of the atmospheric annual cycle in the Southern Hemisphere , 1994 .

[18]  J. Houghton,et al.  Climate change 2001 : the scientific basis , 2001 .

[19]  C. Ropelewski Spatial and Temporal Variations in Antarctic Sea-Ice (1973–82) , 1983 .

[20]  K. Partington,et al.  U.S. National/Naval Ice Center Digital Sea Ice Data and Climatology , 2001 .

[21]  J. Wallace,et al.  Annular Modes in the Extratropical Circulation. Part I: Month-to-Month Variability* , 2000 .

[22]  Donald J. Cavalieri,et al.  A 21 year record of Arctic sea-ice extents and their regional, seasonal and monthly variability and trends , 2002, Annals of Glaciology.

[23]  H. Zwally,et al.  Antarctic Sea Ice, 1973-1976: Satellite Passive-Microwave Observations , 1983 .

[24]  Ola M. Johannessen,et al.  Analysis of merged SMMR‐SSMI time series of Arctic and Antarctic sea ice parameters 1978–1995 , 1997 .

[25]  L. Mysak,et al.  The anomalous sea‐ice extent in Hudson bay, Baffin bay and the Labrador sea during three simultaneous NAO and ENSO episodes , 1996 .

[26]  Syukuro Manabe,et al.  Transient responses of a coupled ocean-atmosphere model to gradual changes of atmospheric CO2 , 1991 .

[27]  N. Streten Satellite observations of the summer decay of the Antarctic sea-ice , 1973 .

[28]  David W. J. Thompson,et al.  Interpretation of Recent Southern Hemisphere Climate Change , 2002, Science.

[29]  Donald J. Cavalieri,et al.  Observed Hemispheric Asymmetry in Global Sea Ice Changes , 1997 .