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Temporal variations of Antarctic blue ice extent: a possible mass balance indicator

Published online by Cambridge University Press:  04 May 2011

Jaehyung Yu
Jaehyung Yu*
Affiliation:
Department of Physics and Geosciences, Texas A&M University – Kingsville, Kingsville, TX 78363, USA ([email protected])
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Abstract

The mass balance of the Antarctic ice sheet has been one of the main interests of the scientific community because of its impact on sea level rise. Blue ice areas are areas of exposed ice where the surface mass balance is negative by sublimation. The relationship between surface mass balance and temporal variations of Antarctic blue ice extent is not clear. This study investigates the temporal variations of 33 sites of blue ice extent with regard to the rate of surface elevation change by employing Landsat TM/ETM+ as well as radar altimetry-based rates of elevation change. The correlations between extent of blue ice areas and surface mass balance are analysed. The correlation generally is not systematic (r = −0.245). It may not be appropriate to use temporal variations in extent of blue ice areas as indicators of mass balance of the Antarctic ice sheet because of large interannual variations in the extent of blue ice areas caused by short term events of accumulation/ablation. Blue ice areas that are located at low elevations (r = −0.120) and far from nearby nunataks (r = −0.194) show low correlations while blue ice areas located in stable environments, such as high elevations (r = −0.516) and close to nearby nunataks (r = −0.783) may be useful as mass balance indicators showing high correlations. Monitoring the expansion of blue ice areas with regard to negative change in elevation (r = −0.510) rather than monitoring the decrease of the extent of blue ice areas with regard to positive change in elevation (r = 0.108) is more useful as a mass balance indicator. There is probably a systematic linkage between temporal variations in extent of blue ice areas and changes of surface elevation for blue ice areas that are at high elevations, close to nearby nunataks, and experiencing expansion.

Type
Research Article
Information
Polar Record , Volume 47 , Issue 4 , October 2011 , pp. 348 - 355
Copyright
Copyright © Cambridge University Press 2011

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References

Bintanja, R. 1999. On the glaciological, meteorological, and climatological significance of Antarctic blue ice areas. Review of Geophysics 37: 337–359.CrossRefGoogle Scholar
Bintanja, R. 2001. Characteristics of snow drift over a bare ice surface in Antarctica. Journal of Geophysical Research 106: 9653–9659.CrossRefGoogle Scholar
Bintanja, R., and Reijmer, C.H.. 2001. Meteorological conditions over Antarctic blue-ice areas and their influence on the local surface mass balance. Journal of Glaciology 47: 37–51.Google Scholar
Bintanja, R., and Van Den Broeke, M.R.. 1995. The climate sensitivity of Antarctic blue-ice areas. Annals of Glaciology 21: 157–161.CrossRefGoogle Scholar
Bronge, L.B. 1999. Ice and snow-type classification in the Vestfold Hills, east Antarctica, using Landsat-TM data and ground radiometer measurements. International Journal of Remote Sensing 20: 225–240.CrossRefGoogle Scholar
Brown, I.C., and Scambos, T.A.. 2004. Satellite monitoring of blue-ice extent near Byrd Glacier, Antarctica. Annals of Glaciology 39: 223–230.Google Scholar
Chen, J.L., Wilson, C.R., Blankenship, D.R., and Tapley, B.D.. 2006. Antarctic mass rates from GRACE. Geophysical Research Letters 33: L11502 (doi:10.1029/2006GL026369).CrossRefGoogle Scholar
Davis, C.H., Li, Y., McConnell, J.R., Frey, M.M., and Hanna, E.. 2005. Snowfall-driven growth in east Antarctic ice sheet mitigates recent sea-level rise. Science 308: 1898–1901 (doi:10.1126/science.1110662).Google Scholar
DiMazio, J., Brenner, A., Schutz, R., Shuman, C.A., and Zwally, H.J.. 2007. GLAS/ICESat 500 m laser altimetry digital elevation model of America. Boulder, Colorado USA: National Snow and Ice Data Center, digital media. URL: http://nsidc.org/data/nsidc-0304.html, (accessed 17 February 2011).Google Scholar
Genthon, C., Lardeux, P., and Krinner, G.. 2007. The surface accumulation and ablation of a coastal blue-ice are near Cap Prudhomme, Terre Adelie, Antarctica. Journal of Glaciology 53: 635–645.Google Scholar
Jacka, T.H., and the ISMASS Committee. 2004. Recommendations for the collection and synthesis of Antarctic Ice Sheet mass balance data. Global and Planetary Change 42: 1–15.Google Scholar
Orheim, O., and Lucchitta, B.. 1990. Investigating climate change by digital analysis of blue ice extent on satellite images of Antarctica. Annals of Glaciology 14: 211–215.CrossRefGoogle Scholar
Sinisalo, A., Moore, J.C., Van De Wal, R.S.W., Bintanja, R., and Jonsson, S.. 2003. A 14 year mass-balance record of a blue-ice area in Antarctica. Annals of Glaciology 37: 213–218.CrossRefGoogle Scholar
Wendt, A., Casassa, G., Rivera, A., and Wendt, J.. 2009. Reassessment of ice mass balance at Horseshoe Valley, Antarctica. Antarctic Science 21: 505–513.Google Scholar
Winther, J., Jespersen, M.N., and Liston, G.E.. 2001. Blue-ice areas in Antarctica derived from NOAA AVHRR satellite data. Journal of Glaciology 47: 325–334.CrossRefGoogle Scholar
Yu, J., Liu, H., Jezek, K., Warner, R., and Wen, J.. 2010. Analysis of velocity field, mass balance and basal melt of the Lambert Glacier–Amery Ice Shelf system by incorporating Radarsat SAR interferometry and ICESat laser altimetry measurements. Journal of Geophysical Research 115, B11102: doi:10.1029/2010JB007456.Google Scholar