Abstract
The widespread retreat of glaciers can be considered as a response to the climate change. Being the largest retreating glacier–ice shelf system in East Antarctica, the Amery Ice Shelf–Lambert Glacier system plays an important role in contributing to sea level rise as well as the surrounding environment and climate. The present study is focused on the investigation of surface melting over the ice shelf using QuikSCAT Ku-band scatterometer data for more than 100 months covering the period from January 2000 to July 2009. The corresponding weather data of Davis Station was obtained from the website of Australian Antarctic Division. Very prominent dips in the backscatter observed in the month of January form a distinct signature caused by physical process of significant melting of the ice/snow surface. The steep increase again in February is attributed to the initiation of the freezing phenomenon. The derived melting index compared well with the passive microwave-based melting index derived by other researchers. A strong relationship was found between the scatterometer-derived melting index and the cumulative monthly mean air temperature. The highest melting was observed in the summer (January) of 2004, and thereafter gradual cooling appeared to take place in the subsequent years. The snow pack thickness, inferred from the backscatter variations, was found to be higher during winters (June) of 2004 and 2005, compared with other years.
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References
Arthern R J, Wingham D J and Ridout A L 2001 Controls on ERS altimeter measurements over ice sheets: Footprint-scale topography, backscatter fluctuations, and the dependence of microwave penetration depth on satellite orientation; J. Geophys. Res. 106 33,471–33,484.
Aschcraft I S and Long D G 2006 Comparison of methods for melt detection over Greenland using active and passive microwave measurements; Int. J. Remote Sens. 27 2469–2488.
Bingham A W and Drinkwater M R 2000 Recent changes in the microwave scattering properties of the Antarctic ice sheet; IEEE Trans. Geosci. Remote Sens. 38 1810–1820.
Convey P, Bindschadler R, Prisco G D, Fahrbach E, Gutt J, Hodgson D A, Mayewski P A, Summerhayes C P, Turner J and The Acce Consortium 2009 Antarctic climate change and the environment; Antarct. Sci. 21 541–563.
Cook A J and Vaughan D G 2009 Overview of aerial changes of the ice shelves on the Antarctic Peninsula over the past 50 years; Cryosphere Discuss 3 579–630.
Fung A 1994 Microwave scattering and emission models and their applications (Norwood: Artech House), p. 573.
Galton-Fenzi B K, Maraldi C, Colemanand R and Hunter J 2008 The cavity under Amery ice shelf, East Antarctica; J. Glaciol. 54 881–887.
Holland P R, Jenkins A and Holland D M 2008 The response of Ice Shelf basal melting to variations in ocean temperature; J. Climate 21 2558–2572.
Kunz L B and Long D 2006 Melt detection in Antarctic ice-shelves using scatterometers and microwave radiometers; IEEE Trans. Geosci. Remote Sens. 44 2461–2469.
Liu H W, Wang L and Jezek K 2005 Wavelet-transform based edge detection approach to derivation of snowmelt onset, end and duration from satellite passive microwave measurements; Int. J. Remote Sens. 26 4639–4660.
Liu H W, Wang L and Jezek K 2006 Spatio-temporal variations of snow melt zones in Antarctic ice sheet derived from satellite SMMR and SMM/I data (1978–2004); J. Geophys. Res. 111 1–20.
Long D and Drinkwater M R 1994 Greenland observed at high resolution by the Seasat-A scatterometer; J. Glaciol. 32 213–230.
Meier M F 1993 Ice, climate and sea level: Do we know what is happening? In: NATO ASI Series, Ice in the Climate System (ed.) Pettier W R (Berlin, Germay: Springer-Verlag), pp. 141–160.
Picard C and Fily M 2006 Surface melting observations in Antarctica by microwave radiometers: Corrcting 26-year time series from changes in acquisition hours; Remote Sens. Environ. 104 325–336.
Picard G, Fily M and Gallee H 2007 Surface melting derived from microwave radiometer: A climatic indicator in Antarctica; Ann. Glaciol. 46 29–34.
Quiency D G and Lackman A 2009 Progress in satellite remote sensing of ice sheets; Prog. Phys. Geogr. 33 547–567.
Rignot E 2006 Changes in ice dynamics and mass balance of the Antarctic ice sheet; Phil. Trans. R. Soc. A 364 1637–1655.
Scambos T, Hulbe C, Fahnestock M and Bohlander J 2000 The link between climate warming and break-up of ice shelves in the Antarctic Peninsula; J. Glaciol. 46 510–530.
Schneider D P, Steig E J, Ommen T, Dixon D, Mayewski P A, Jones J and Bitz C 2006 Antarctic temperature over the past two centuries from ice cores; Geophys. Res. Lett. 33, doi: 10.1029/2006GL027057.
Shephard A and Wingham D 2007 Recent sea-level contributions of the Antarctic and Greenland icesheets; Science 315 1529–1532.
Simonds I, Jones D A and Walland D J 1998 Multi-decadal climate variability in the Antarctic region and global change; Ann. Glaciol. 27 617–622.
Smith LC, Sheng Y, Forster R R, Steffen K, Frey K E and Alsdorf D E 2003 Melting of small Arctic ice caps observed from ERS scatterometer time series; Geophys. Res. Lett. 30, doi: 10.1029/2003GL017641.
Tedesco M 2009 Assessment and development of snowmelt retrieval algorithms over Antarctica from K-band spaceborne brightness temperature (1979–2008); Remote Sens. Environ. 113 979–997.
Torinesi O, Fily M and Genthon C 2003 Interannual variability and trends of the Antarctic summer melting period from 20 years of spaceborne microwave data; J. Climate 16 1047–1060.
Ulaby F, Moore R and Fung A 1986 Microwave remote sensing, active and passive; Vol. III (Norwood: Artech House) pp. 1893–1894.
Velicogna I and Wahr J 2006 Measurements of time-variability show mass loss in Antarctica; Science 311 1754–1756.
Wang L, Sharp M J, Rivard B, Marshall S and Burgess D 2005 Melt season duration on Canadian Arctic caps, 2000–2004; Geophys. Res. Lett. 32, doi: 10.1029/2005GL023962.
Wen J, Jezek K C, Monaghan A J, Sun B, Ren J and Huybrechts P 2006 Accumulation variability and mass budgets of the Lambert Glacier–Amery Ice Shelf system, East Antarctica, at high elevations; Ann. Glaciol. 43 351–360.
Williams M J M, Jenkins A and Determann J 1998 Physical control on ocean circulation beneath ice shelves revealed by numerical models. In: Ocean, ice and atmosphere interactions at the Antarctic continental margin, Antarctic Research Series 75 (eds) Jacobs S S and Weiss R R (Washington DC: American Geophysical Union), pp. 285–300.
Wingham D J, Shephard A, Muis A and Marshall G J 2006 Mass balance of Antarctic ice sheet; Phil. Trans. R. Soc. A 364 1627–1635.
Wismann V 2000 Monitoring of seasonal snowmelt on Greenland with ERS scatterometer data; IEEE Trans. Geosci. Remote Sens. 38 1821–1826.
Zabel I H, Jezek K C, Baggeroer P A and Gogineni S P 1995 Ground-based radar observations of snow stratigraphy and melt processes in the percolation facies of the Greenland ice sheet; Ann. Glaciol. 21 40–44.
Zwally H J and Fiegles S 1994 Extent and duration of Antarctic surface melting; J. Glaciol. 40 463–476.
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Oza, S.R., Singh, R.K.K., Vyas, N.K. et al. Study of inter-annual variations in surface melting over Amery Ice Shelf, East Antarctica, using space-borne scatterometer data. J Earth Syst Sci 120, 329–336 (2011). https://doi.org/10.1007/s12040-011-0055-8
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DOI: https://doi.org/10.1007/s12040-011-0055-8