World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Speedup and Fracturing of George VI Ice Shelf, Antarctic Peninsula : Volume 7, Issue 3 (06/05/2013)

By Holt, T. O.

Click here to view

Book Id: WPLBN0003976625
Format Type: PDF Article :
File Size: Pages 20
Reproduction Date: 2015

Title: Speedup and Fracturing of George VI Ice Shelf, Antarctic Peninsula : Volume 7, Issue 3 (06/05/2013)  
Author: Holt, T. O.
Volume: Vol. 7, Issue 3
Language: English
Subject: Science, Cryosphere
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Siegfried, M. R., Quincey, D. J., Glasser, N. F., & Holt, T. O. (2013). Speedup and Fracturing of George VI Ice Shelf, Antarctic Peninsula : Volume 7, Issue 3 (06/05/2013). Retrieved from http://www.ebooklibrary.org/


Description
Description: Centre for Glaciology, Institute of Geography and Earth Sciences, Aberystwyth University, Aberystwyth SY23 3DB, UK. George VI Ice Shelf (GVIIS) is located on the Antarctic Peninsula, a region where several ice shelves have undergone rapid breakup in response to atmospheric and oceanic warming. We use a combination of optical (Landsat), radar (ERS 1/2 SAR) and laser altimetry (GLAS) datasets to examine the response of GVIIS to environmental change and to offer an assessment on its future stability. The spatial and structural changes of GVIIS (ca. 1973 to ca. 2010) are mapped and surface velocities are calculated at different time periods (InSAR and optical feature tracking from 1989 to 2009) to document changes in the ice shelf's flow regime. Surface elevation changes are recorded between 2003 and 2008 using repeat track ICESat acquisitions. We note an increase in fracture extent and distribution at the south ice front, ice-shelf acceleration towards both the north and south ice fronts and spatially varied negative surface elevation change throughout, with greater variations observed towards the central and southern regions of the ice shelf. We propose that whilst GVIIS is in no imminent danger of collapse, it is vulnerable to ongoing atmospheric and oceanic warming and is more susceptible to breakup along its southern margin in ice preconditioned for further retreat.

Summary
Speedup and fracturing of George VI Ice Shelf, Antarctic Peninsula

Excerpt
Parkinson, C. L. and Cavalieri, D. J.: Antarctic sea ice variability and trends, 1979–2010, The Cryosphere, 6, 871–880, doi:10.5194/tc-6-871-2012, 2012.; Paterson, W. S. B.: The Physics of Glaciers, 3 Edn., Permagon, 1994.; Payne, A. J., Vieli, A., Shepherd, A. P., Wingham, D. J., and Rignot, E.: Recent dramatic thinning of largest west Antarctic ice stream triggered by oceans, Geophys. Res. Lett., 31, L23401, doi:10.1029/2004gl021284, 2004.; Pearson, M. R. and Rose, I. H.: The dynamics of George VI Ice Shelf, Brit. Antarct. Surv. B, 52, 205–220, 1983.; Potter, J. R., Paren, J. G., and Loynes, J.: Glaciological and oceanography calculations of the mass balance and oxygen isotopes ratio of a melting ice shelf, J. Glaciol., 30, 161–170, 1984.; Potter, J. R., and Paren, J. G.: Interaction between ice shelf and ocean in George VI Sound, Antarctica, Antarct Res Ser, 43, 35-58, 1985.; Pritchard, H. D., Ligtenberg, S. R. M., Fricker, H. A., Vaughan, D. G., van den Broeke, M. R., and Padman, L.: Antarctic ice-sheet loss driven by basal melting of ice shelves, Nature, 484, 502–505, 10.1038/nature10968, 2012.; Rack, W., Doake, C. S. M., Rott, H., Siegel, A., and Skvarca, P.: Interferometric analysis of the deformation pattern of the northern Larsen Ice Shelf, Antarctic Peninsula, compared to field measurements and numerical modeling, Ann. Glaciol., 31, 205–210, 2000.; Rack, W. and Rott, H.: Pattern of retreat and disintegration of the Larsen B Ice Shelf, Antarctic Peninsula, Ann. Glaciol., 39, 505–510, 2004.; Reynolds, J. M.: Lakes on George VI Ice Shelf, Antarctica, Polar. Rec., 20, 425–432, 1981.; Reynolds, J. M.: The structure of Wordie Ice Shelf, Antarctic Peninsula, Brit. Antarct. Surv. B, 80, 57–64, 1988.; Ridley, J. K.: Surface melting on Antarctic Peninsula ice shelves detected by passive microwave sensors, Geophys. Res. Lett., 20, 2639–2642, doi:10.1029/93GL02611, 1993.; Rignot, E., Casassa, G., Gogineni, P., Krabill, W., Rivera, A., and Thomas, R.: Accelerated ice discharge from the Antarctic Peninsula following the collapse of Larsen B Ice Shelf, Geophys. Res. Lett., 31, L18401, doi:10.1029/2004GL020697, 2004.; Rignot, E., Velicogna, I., van den Broeke, M. R., Monaghan, A., and Lenaerts, J.: Acceleration of the contribution of the Greenland and Antarctic Ice Sheets to sea level rise, Geophys. Res. Lett., 38, L05503, doi:10.1029/2011gl046583, 2011.; Roberts, S. J., Hodgson, D. A., Bentley, M. J., Smith, J. A., Millar, I. L., Olive, V., and Sugden, D. E.: The Holocene history of George VI Ice Shelf, Antarctic Peninsula from clast-provenance analysis of epishelf lake sediments, AAPG. Stud. Geol., 259, 258–283, 2008.; Rott, H., Skvarca, P., and Nagler, T.: Rapid collapse of northern Larsen Ice Shelf, Antarctica Science, 271, 788–792, doi:10.1126/science.271.5250.788, 1996.; Rott, H., Rack, W., Nagler, T., and Skvarca, P.: Climatically induced retreat and collapse of northern Larsen Ice Shelf, Antarctic Peninsula, Ann. Glaciol., 27, 86–92, 1998.; Rott, H., Rack, W., Skvarca, P., and de Angelis, H.: Northern Larsen Ice Shelf – further retreat after the collapse., Ann. Glaciol., 34, 277–282, 2002.; Rott, H., Rack, W., and Nagler, T.: Increased export of grounded ice after the collapse of northern Larsen Ice Shelf, Antarctic Peninsula, observed by ENVISAT ASAR, Geoscience and Remote Sensing Symposium, IGARSS 2007, IEEE International, 2007, 1174–1176, 2007.; Scambos, T. A., Hulbe, C., Fahnestock, M., and Bohlander, J.: The link between climate warming and break-up of ice shelves in the Antarctic Peninsula, J. Glaciol., 46, 516–530, 2000.; Scambos

 

Click To View

Additional Books


  • On the Chemical Dynamics of Extracellula... (by )
  • Nature (by )
  • Water Masses and Zonal Current in the We... (by )
  • Large-eddy Simulation of Plume Dispersio... (by )
  • On Daily Interpolation of Precipitation ... (by )
  • Effects of Nonlinear Rheology, Temperatu... (by )
  • Large Scale Integrated Hydrological Mode... (by )
  • Physical Forcing and Physical/Biochemica... (by )
  • Influence of Regional Precipitation Patt... (by )
  • Adjustment of the Basin-scale Circulatio... (by )
  • Abhandlungen Der Königlichen Akademie De... Volume: 1822-33 (by )
  • Digital Climate Atlas of the Carpathian ... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.