Etude des précipitations et de la fonte sur un glacier tropical: le glacier du Zongo, Bolivie, 16°S
| Autor: | Jean Emmanuel Sicart, Bernard Francou, Robert Gallaire, Pierre Ribstein |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Hydrological Sciences Journal. 48:799-808 |
| ISSN: | 2150-3435 0262-6667 |
| Popis: | The relationships are presented between snowfall and melting on the Zongo Glacier in Bolivia, where precipitation and ablation reach their peaks in the wet season (austral summer). Clouds originate in the Amazon basin and produce precipitation at mid-day in the Andean valleys, then in the afternoon in the mountains. During the gradual build-up of the wet season, from September to December, sporadic snowfalls cover the melting ice. Due to the albedo fluctuations, net solar radiation and melting vary drastically, reaching their yearly maximum values when the snow cover is reduced. In the middle of the wet season, from January to March, snow remains on the glacier surface at low altitude, albedo is high and melting reduced. The dry season from May to August is a period of low ablation interrupted by scarce precipitation events. Melting of tropical glaciers strongly depends on the seasonal distribution of precipitation due to the high albedo of the fresh snow deposited during the summer. |
| Databáze: | OpenAIRE |
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