Contribution of the Patagonia Icefields of South America to Sea Level Rise

Science

Volumn 302, Issue 5644, 2003, Pages 434-437

  Rignot, Eric ^a   Rivera, Andrés ^b,c,d   Casassa, Gino ^d  

^a CALIFORNIA INSTITUTE OF TECHNOLOGY   (United States)

^b UNIVERSITY OF CHILE   (Chile)

^c UNIVERSITY OF BRISTOL   (United Kingdom)

^d CENTRO DE ESTUDIOS CIENTÍFICOS CECS   (Chile)

Author keywords

[No Author keywords available]

Indexed keywords

GLACIERS; MAPPING; PRECIPITATION (METEOROLOGY); SEA LEVEL; SURFACE TOPOGRAPHY;

DIGITAL ELEVATION MODELS;

OCEAN ENGINEERING;

ICE;

AIR TEMPERATURE; ARTICLE; GLACIER; PRIORITY JOURNAL; SEA LEVEL; SOUTH AMERICA; TELECOMMUNICATION; TOPOGRAPHY;

EID: 0142020903     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1087393     Document Type: Article

References (31)

1. C. R. Warren, D. E. Sudgen, Arct. Alp. Res. 25, 316 (1993).
2. M. Aniya, H. Sato, R. Naruse, P. Skvarca, G. Casassa, Photogram. Eng. Remote Sens. 62, 1361 (1996).
3. M. Aniya, Arct. Alp. Res. 20, 179 (1988).
4. G. Casassa, A. Rivera, M. Aniya, R. Naruse, in The Patagonian Iefields: A Unique Natural Laboratory for Environmental and Climate Change Studies, G. Casassa, F. Sepúlveda, R. Sinclair, Eds. (Kluwer Academic/Plenum, New York, 2002), pp. 67-83.
5. M. F. Meier, Science 226, 1419 (1984).
6. M. B. Dyurgerov, INSTAAR Occasional Paper 55 (Univ. of Colorado, Boulder, CO, 2002).
7. W. Haeberli, R. Frauenfelder, M. Hoelzle, M. Maisch, Geogr. Ann. Phys. Geogr. 81A, 585 (1999).
8. M. Aniya, Arct. Antarct. Alp. Res. 31 165 (1999).
9. A. Rivera, C. Acuña, G. Casassa, F. Brown, Ann. Glaciol. 34, 367 (2002).
10. S. Hensley, P. Rosen, E. Gurrola, in Proceedings of SPIE, Volume 4152, Microwave Remote Sensing of the Atmosphere and Environment II, Sendai, Japan, 9 to 12 October 2000, T. T. Wilheit, H. Masuko, H. Wakabayashi, Eds. (SPIE, Sendai, Japan, 2000).
11. C. Raymond, T. Neumann, E. Rignot, A. Rivera, G. Casassa, EOS 81 (fall meeting supplement), H61G02 (2000).
12. A. Rivera, unpublished data.
13. E. Rignot, K. Echelmeyer, W. B. Krabill, Geophys. Res. Lett. 28, 3501 (2001).
14. A. Rivera, "Comparison of DEMs generated from topographic maps of 1975 and 1995" (Bristol Glaciology Centre, Bristol, UK, 2001) (unpublished).
15. 1)] because of the lack of recognizable surface features in the photographs at the higher elevation glacier plateau. The 1995 DEM only covers SPI and does not include all the glacier fronts. The DEMs are referenced to mean sea level with a World Geodetic System 1984 datum. The vertical precision of the DEMs is 19 m (17 m error in regular cartography, and 9 m error in contour interpolation). No information is available about the precision of the Argentinean cartography, but comparison with SRTM on exposed rock reveals a vertical random error of 50 m near Chico, Viedma, and Upsala Glaciers and larger errors to the north, south, and west of these regions, where the cartography is not reliable.
16. The random error in elevation difference with SRTM is 20 m for the 1975/1995 DEMs and 50 m for the 1968 DEM. The extrapolation error of the elevation changes due to polynomial fitting was calculated for each glacier as the standard error of the model fit (1σ) and ranges from 10 to 30 m. The total error is the quadrature sum of these two errors. For area-average thickness changes, the total error is further divided by the square root of the number of IGMCh contours employed, typically around 20, depending on the glacier coverage by IGMCh and its area-elevation distribution (table S1). Few contours are available on the accumulation plateau.
17. A. Arendt, K. A. Echelmeyer, W. D. Harrison, C. S. Lingle, V. B. Valentine, Science 297, 382 (2002).
18. L. A. Rasmussen, H. Conway, C. F. Raymond, in preparation.
19. M F. Meier, M. B. Dyurgerov, Science 297, 350 (2002).
20. A. Rivera, G. Casassa, Global Planet. Change 22, 233 (1999).
21. M. Aniya, H. Sato, R. Naruse, P. Skvarca, G. Casassa, Arct. Alp. Res. 29, 1 (1997).
22. P. Skvarca, K. Satow, R. Naruse, J. Leiva, Bull. Glacier Res. 13, 11 (1995).
23. G. Casassa, H. Brecher, A. Rivera, M. Aniya, Ann. Glaciol. 24, 106 (1997).
24. B. Rosenblüth, H. A. Fuenzalida, P. Aceituno, Int. J. Climatol. 17, 67 (1997).
25. R. Naruse, M. Aniya, P. Skvarca, G. Casassa, Ann. Glaciol. 21, 297 (1995).
26. T. Ibarzabal y Donángelo, J. Hoffmann, R. Naruse, Bull. Glacier Res. 14, 29 (1996).
27. J. Carrasco, G. Casassa, A. Rivera, in The Patagonian Icefields: A Unique Natural Laboratory for Environmental and Climate Change Studies, G. Casassa, F. Sepúlveda, R. Sinclair, Eds. (Kluwer Academic/Plenum, New York, 2002), pp. 29-41.
28. C. Warren, M. Aniya, Global Planet. Change 22, 59 (1999).
29. M. F. Meier, A. Post, J. Geophys. Res. 92, 9051 (1987).
30. S. Yamaguchi, R. Naruse, T. Matsumoto, H. Ohno, Arct. Antarct. Alp. Res. 35, 170 (2003).
31. We thank the Jet Propulsion Laboratory (JPL) processing team for the SRTM data; IGMCH for providing restricted access to the cartography of the icefields; M. Peña for his assistance in digitizing contour lines of the icefields; and L. Rasmussen, H. Conway, and C. Raymond for sharing their results in advance of publication. E.R. performed this work at JPL under a contract with NASA's Solid Earth and Natural Hazard Program. A.R. was supported by Fondo Nacional de Ciencia y Tecnologia, Chile project 1000445.