Ukrainian Antarctic journal

No 4-5 (2006): Ukrainian Antarctic Journal
Articles

Subpolar glaciers network as natural sensors of global warming evolution

M. del Carmen Dominguez
University of Salamanca, Salamanca
A. Eraso
Polytechnic University of Madrid, Madrid
Published December 15, 2006

Abstract

Obvious increase in sea level. In the work hypotheses now in use, a third of the increase in sea level is considered to be due to water thermal dilatancy and other third would come from the melting of temperate glaciers, being unknown the origin of the last third.

In the expeditions carried out both to temperate and subpolar glaciers in both hemispheres, we have observed the existence of endoglacier and subglacier flows and drainages also in subpolar glaciers. Our main work hypothesis is centred on investigating the role played by subpolar glacier discharge in global warming, as we consider this discharge may represent that unknown third of sea level increase.

Response in glacier discharge is so immediate and sensitive to any variation in environment temperature that we consider that glaciers work as natural sensors of Global Warming and may offer registers of great utility as indicators to estimate its evolution. Using long time series (pluriannual) of glacier discharge we will know the temporal evolution of global warming and implementing more catchment areas in both hemispheres we will be able to know the latitude distribution of glacier discharge.

References

  1. Braithwaite, R.J. (1995). Positive degree-day factors for ablation on the Greenland Ice Sheet studied by energy-balance modelling. Journ. Glaciol., 41, 153–160.
  2. Braithwaite, R.J., & Oleson O.B. (1989). Calculation of glacier ablation from air temperature, West Greenland. In: J. Oerlemans (Ed.), Glacier fluctuations and climatic change. Kluwer Acad. Publ., Dordrecht. P. 219–233.
  3. Daoke, C.S.M., & Vaugham D.G. (1991). Rapid desintegration of the Wordie Ice Shelf in response to atmospheric warming. NATURE, (350), 328–330.
  4. Domínguez, M.C., & Eraso, A. (2001). GLACKMA, una aportación de Castilla y León a la investigación sobre el calentamiento global de la Tierra. Medio Ambiente. Junta de Castilla y León, 16, 52–54. Valladolid.
  5. Domínguez M.C., & Eraso A. (2002). Los glaciares como sensores naturales del calentamiento global. Avances en Calidad Ambiental, Ediciones Universidad de Salamanca, 1, 245–250, Salamanca.
  6. Eraso, A. (2004). El calentamiento global, su registro desde los glaciares subpolares y sus consecuencias medioambientales. Centro de Publicaciones. Ministerio de Medio Ambiente, Instituto Nacional de Meteorología. P. 16. Conferencia de Clausura de la V Edición del Curso Magíster de Riesgos Climáticos e Impacto Ambiental. Madrid.
  7. Eraso, A., Domínguez, M.C. (2001). El Calentamiento Global visto desde los glaciares subpolares de la Antártida. Consideraciones sobre su repercusión en la subida del nivel del mar; RIESGOS NATURALES, Capítulo 44, 819–829.
  8. Eraso, A., Pulina, M. (2001). Cuevas en hielo y ríos bajo los glaciares; 2ª Ed. Mc. Graw-Hill. Madrid, España.
  9. Eraso, A., & Domínguez, M.C. (2004a). Subpolar glaciers and global warming, Vestnik, Russian Academy of Natural Sciences, l.4(1). Moscow, Russia. 53–57.
  10. Eraso, A., & Domínguez, M.C. (2004b). Implementation of experimental pilot catchment areas for the study of the discharge of subpolar glaciers. VI Symposium Glacier Caves and Karst in Polar Regions. 117–136. Ny-Alesund (Svalbard), Norway.
  11. Mercer, J.H. (1978). West Antarctic ice sheet and CO2 greenhouse effectia threat of disaster. Nature, 271, 321–325.
  12. Oerlemans, J. (1991). The mass balance of the Greenland Ice Sheet: sensitivity to climate change as revealed by energy-balance modelling. Holocene, 1, 40–49.
  13. Oppenheimer, M. (1998). Global warming and the stability of the West Antarctic ice sheet. Nature, 393, 325–332.
  14. Remy, F., Ritz, C. (2002). Los casquetes polares, Investigación y Ciencia, 76-85. Barcelona, Spain.
  15. Röthlisberger, H. (1972). Water pressure in intra and subglacial channels. Journ. Glaciol., 11, 177–203.
  16. Rott, H., Skvarca, P., & Nagler, T. (1996). Rapid collapse of northern Larsen ice shelf, Antarctica. SCIENCE, 271, 788–192.