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Satellite-derived Volume Loss Rates and Glacier Speeds for the Cordillera Darwin Icefield, Chile : Volume 7, Issue 3 (14/05/2013)

By Melkonian, A. K.

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Book Id: WPLBN0003978385
Format Type: PDF Article :
File Size: Pages 17
Reproduction Date: 2015

Title: Satellite-derived Volume Loss Rates and Glacier Speeds for the Cordillera Darwin Icefield, Chile : Volume 7, Issue 3 (14/05/2013)  
Author: Melkonian, A. K.
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

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Pritchard, M. E., Rivera, A., Bown, F., Bernstein, S. A., Willis, M. J., & Melkonian, A. K. (2013). Satellite-derived Volume Loss Rates and Glacier Speeds for the Cordillera Darwin Icefield, Chile : Volume 7, Issue 3 (14/05/2013). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, New York, USA. We produce the first icefield-wide volume change rate and glacier velocity estimates for the Cordillera Darwin Icefield (CDI), a 2605 km2 temperate icefield in southern Chile (69.6° W, 54.6° S). Velocities are measured from optical and radar imagery between 2001–2011. Thirty-six digital elevation models (DEMs) from ASTER and the SRTM DEM are stacked and a weighted linear regression is applied to elevations on a pixel-by-pixel basis to estimate volume change rates.

The CDI lost mass at an average rate of −3.9 ± 1.5 Gt yr−1 between 2000 and 2011, equivalent to a sea level rise (SLR) of 0.01 ± 0.004 mm yr−1 and an area-averaged thinning rate of −1.5 ± 0.6 m w.e.(water equivalent) yr−1.

Thinning is widespread, with concentrations near the front of two northern glaciers (Marinelli, Darwin) and one western (CDI-08) glacier. Thickening is apparent in the south, most notably over the advancing Garibaldi Glacier. The northeastern part of the CDI has an average thinning rate of −1.9 ± 0.7 m w.e. yr−1, while the southwestern part has an average thinning rate of −1.0 ± 0.4 m w.e. yr−1.

Velocities are obtained over many of the CDI glaciers for the first time. We provide a repeat speed time series at the Marinelli Glacier. There we measure maximum front speeds of 7.5 ± 0.2 m day−1 in 2001, 9.5 ± 0.6 m day−1 in 2003 and 10 ± 0.3 m day−1 in 2011. The maintenance of high front speeds from 2001 to 2011 supports the hypothesis that Marinelli is in the retreat phase of the tidewater cycle, with dynamic thinning governed by the fjord bathymetry.


Summary
Satellite-derived volume loss rates and glacier speeds for the Cordillera Darwin Icefield, Chile

Excerpt
Aster, R. C., Borchers, B., and Thurber, C. H.: Parameter Estimation and Inverse Problems, Elsevier Inc., Burlington, MA, 2005.; Ahn, Y. and Howat, I. M.: Efficient Automated Glacier Surface Velocity Measurement From Repeat Images Using Multi-Image/Multichip and Null Exclusion Feature Tracking, IEEE T. Geosci. Remote, 49, 2838–2846, 2011.; Arendt, A. A., Echelmeyer, K. A., Harrison, W. D., Lingle, C. S., and Valentine, V. B.: Rapid wastage of Alaska glaciers and their contribution to rising sea level, Science (New York, NY), 297, 382–386, science.1072497>doi:10.1126/science.1072497, 2002.; Bamber, J. L. and Rivera, A.: A review of remote sensing methods for glacier mass balance determination, Global Planet. Change, 59, 138–148, 2007.; Benn, D. I. and Evans, D. J.: Glaciers & Glaciology, Oxford University Press Inc., New York, 1998.; Benn, D. I., Hulton, N. R. J., and Mottram, R. H.: Calving laws, sliding laws and the stability of tidewater glaciers, Ann. Glaciol., 46, 123–130, 2007.; Berthier, E., Arnaud, Y., Baratoux, D., Vincent, C., and Rémy, F.: Recent rapid thinning of the Mer de Glace glacier derived from satellite optical images, Geophys. Res. Lett., 31, L17401, doi:10.1029/2004GL020706, 2004.; Berthier, E., Le Bris, R., Mabileau, L., Testut, L., and Rémy, F.: Ice wastage on the Kerguelen Islands (49° S, 69° E) between 1963 and 2006, J. Geophys. Res., 114, F03005, doi:10.1029/2008JF001192, 2009.; Berthier, E., Schiefer, E., Clarke, G. K. C., Menounos, B., and Rémy, F.: Contribution of Alaskan glaciers to sea-level rise derived from satellite imagery, Nat. Geosci., 3, 92–95, doi:10.1038/ngeo737, 2010.; Bown, F., Rivera, A., Zenteno, P., Bravo, C., and Cawkwell, F.: First glacier inventory and recent glacier variations of Isla Grande de Tierra del Fuego and adjacent islands in Southern Chile, in: GLIMS book, in press, 2013.; Cuffey, K. M. and Paterson, W. S. B.: The Physics of Glaciers, Butterworth-Heinemann, fourth Edn., 2010.; Davies, B. and Glasser, N.: Accelerating shrinkage of Patagonian glaciers from the Little Ice Age ( AD 1870) to 2011, J. Glaciol., 58, 1063–1084, doi:10.3189/2012JoG12J026, 2012.; Fernandez, R. A., Anderson, J. B., Wellner, J. S., and Hallet, B.: Timescale dependence of glacial erosion rates: A case study of Marinelli Glacier, Cordillera Darwin, southern Patagonia, J. Geophys. Res., 116, F01020, doi:10.1029/2010JF001685, 2011.; Fujisada, H., Bailey, G., Kelly, G., Hara, S., and Abrams, M.: ASTER DEM performance, IEEE T. Geosci. Remote, 43, 2707–2714, doi:10.1109/TGRS.2005.847924, 2005.; Gao, F., Masek, J., and Wolfe, R. E.: Automated registration and orthorectification package for Landsat and Landsat-like data processing, J. Appl. Remote Sens., 3, 033515, doi:10.1117/1.3104620, 2009.; Gardelle, J., Berthier, E., and Arnaud, Y.: Impact of resolution and radar penetration on glacier elevation changes computed from DEM differencing, J. Glaciol., 58, 419–422, doi:10.3189/2012JoG11J175, 2012.; Gardner, A. S., Moholdt, G., Arendt, A., and Wouters, B.: Long-term contributions of Baffin and Bylot Island Glaciers to sea level rise: an integrated approach using airborne and satellite laser altimetry, stereoscopic imagery and satellite gravimetry, The Cryosphere Discu


 

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