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Anomalous heat and mass budget of Glaciar Zongo, Bolivia, during the 1997/98 El Niño year

  • P. Wagnon (a1), P. Ribstein (a2), B. Francou (a3) and J. E. Sicart (a2)

Abstract

During El Niño–Southern Oscillation (ENSO) warm events, outer tropics glaciers usually experience a deficit of precipitation, an increase of air temperature and a strongly negative mass balance. At Glaciar Zongo, Bolivia, this was particularly striking during the vigorous 1997/98 El Niño event, one of the strongest of the century, and which resulted in an annual depth of runoff two-thirds higher than normal. We compare the energy balance on the glacier between two contrasting cycles, 1996/97 (La Niña year) and 1997/98 (El Niño year). Due to a 1.3°C increase of annual mean air temperature, the sensible-heat flux slightly increases from 6.1 to 9.8 W m−2 During the El Niño year, sublimation is reduced, leaving more energy for melting (LE = −18.1 W m−2 in 1996/97 and LE = −11.6 W m−2 in 1997/98). The main factor responsible for the dramatic increase in melting is the net all-wave radiation, which is three times higher in 1997/98 than in 1996/97 (48.7 and 15.8 W m−2, respectively). This sharp increase of net all-wave radiation is related to the decrease of albedo due to the precipitation deficit.

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References

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Brutsaert, W. H. 1982. Evaporation into the atmosphere. Dordrecht, D. Reidel. Kluwer Academic Publishers.
Chen, W.Y. 1982. Assessment of Southern Oscillation sea-level pressure indices. Mon. Weather Rev., 100, 800807.
Diaz, H. F. and Graham, N. E.. 1996. Recent changes in tropical freezing heights and the role of sea surface temperature. Nature, 383(6596), 152155.
Francou, B., Ribstein, P., Saravia, R. and Tiriau, E.. 1995. Monthly balance and water discharge of an inter-tropical glacier: Zongo Glacier, Cordillera Real, Bolivia, 16° S. J. Glaciol., 41(137), 6167.
Glantz, M. H. 1996. Currents of change: El Niño’s impact on climate and society. Cambridge, Cambridge University Press.
Graham, N. E. 1995. Simulation of recent global temperature trends. Science, 267(5198), 666671.
Hastenrath, S. and Ames, A.. 1995. Diagnosing the imbalance of Yanamarey Glacier in the Cordillera Blanca of Peru. J. Geophys. Res., 100(D3), 51055112.
Hastenrath, S. and Kruss, P. D.. 1992. The dramatic retreat of Mount Kenya’s glaciers between 1963 and 1987: greenhouse forcing. Ann. Glaciol., 16, 127133.
Hense, A., Krahe, P. and Flohn, H.. 1988. Recent fluctuations of tropospheric temperature and water vapor content in the tropics. Meteorol. Atmos. Phys., 38(4), 215227.
Hodge, S. M., Trabant, D. C., Krimmel, R. M., Heinrichs, T. A., March, R. S. and Josberger, E. G.. 1998. Climate variations and changes in mass of three glaciers in western North America. J. Climate, 11(9), 21612179.
Kaser, G., Hastenrath, S. and Ames, A.. 1996. Mass balance profiles on tropical glaciers. Z. Gletscherkd. Glazialgeol., 32, Part 2, 7581.
Kuhn, M. 1981. Climate and glaciers. International Association of Hydrological Sciences Publication 131 (Symposium at Canberra 1979 — Sea Level, Ice and Climatic Change), 320.
Morris, E. M. 1989. Turbulent transfer over snow and ice. J. Hydrol., 105(3–4), 205223.
Oerlemans, J. 1994. Quantifying global warming from the retreat of glaciers. Science, 264(5156), 243245.
Oerlemans, J. and Fortuin, J. P. F.. 1992. Sensitivity of glaciers and small ice caps to greenhouse warming. Science, 258(5079), 115117.
Oerlemans, J. and 10 others. 1998. Modelling the response of glaciers to climate warming. Climate Dyn., 14(4), 267274.
Philander, S. G. 1990. El Niño, La Niña, and the Southern Oscillation. San Diego, CA, Academic Press.
Ribstein, P., Tiriau, E., Francou, B. and Saravia, R.. 1995. Tropical climate and glacier hydrology: a case study in Bolivia. J. Hydrol., 165(1–4), 221234.
Thompson, L. G., Mosley-Thompson, E. and Arnao, B. M.. 1984. Major El Niño/Southern Oscillation events recorded in the stratigraphy of the tropical Quelccaya Ice Cap. Science, 226(4670), 5052.
Thompson, L. G. and 7 others. 1995. Late glacial stage and Holocene tropical ice core records from Huascarán, Peru. Science, 269(5220), 4650.
Thompson, L. G. and 11 others. 1998. A 25,000-year tropical climate history from Bolivian ice cores. Science, 282(5395), 18581864.
Trenberth, K. E. and Hoar, T. J.. 1996. The 1990–1995 El Niño–Southern Oscillation event: longest on record. Geophys. Res. Lett., 23(1), 5760.
Vuille, M. 1999. Atmospheric circulation over the Bolivian Altiplano during dry and wet periods and extreme phases of the Southern Oscillation. Int. J. Climatol., 19, 15791600.
Vuille, M., Hardy, D. R., Braun, C., Keimig, F. and Bradley, R. S.. 1998. Atmospheric circulation anomalies associated with 1996/1997 summer precipitation events on Sajama Ice Cap, Bolivia. J. Geophys. Res., 103, 11,19111,204.
Wagnon, P., Ribstein, P., Francou, B. and Pouyaud, B.. 1999. Annual cycle of the energy balance of Zongo Glacier, Cordillera Real, Bolivia. J. Geophys. Res., 104(D4), 39073923.
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Journal of Glaciology
  • ISSN: 0022-1430
  • EISSN: 1727-5652
  • URL: /core/journals/journal-of-glaciology
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