GLOFs of Laguna de los Tempanos, glacier-dammed side lake of Glaciar Steffen, Hielo Patagonico Norte, Chile, since 1974

Simple item page
dc.contributor.authorAniya, Masamu
dc.contributor.authorDusaillant, Alejandro
dc.contributor.authorO'Kuinghttons, Jorge
dc.contributor.authorBarcaza, Gonzalo
dc.contributor.authorBravo, Sidi
dc.date.accessioned2025-01-23T19:46:06Z
dc.date.available2025-01-23T19:46:06Z
dc.date.issued2020
dc.description.abstractGlacier lake outburst floods (GLOF) at Laguna de los Tempanos, a glacier-dammed side lake of Glaciar Steffen, Hielo Patagonico Norte, were documented for a period between December 1974 and February 2020. With manual interpretation of 150 remote sensing images of aerial surveys, vertical aerial photographs, Landsat MSS, TM, ETM and OLI, ALOS, and ASTER images, 19 GLOFs were captured/ inferred by focusing on icebergs and water levels, except two periods in the 1980 s and the 1990 s for which no image was available. This translates to the occurrence of the GLOF on average once ca. every 14 months. Many GLOFs occurred in late summer to early fall, with a few in late spring: but one GLOF was inferred to have occurred in wintertime. The causes of GLOFs were supposed to be heavy rainfalls, probably accompanied with rapid snow/ice melting by warm air temperatures, judging from the general weather condition over the laguna area. The latest two GLOFs (2016 & 2017) were very large, enough to have completely exposed the lake floor in the middle section. The GLOF of 2017 (Mar. 31) was registered in a hydrograph set up at Lower Rio Huemules. After this GLOF, the water level has become stable with a more or less continuous outlet stream along the glacier sidewall and there has been no GLOF to date. So probably the prospect of another GLOF has considerably diminished by now. As Glaciar Steffen receded about 6 km during this study period, the glacier has thinned accordingly, to which the water level adjusted with three distinctive relatively stable states while fluctuating frequently.
dc.fuente.origenWOS
dc.identifier.doi10.5331/bgr.20R01
dc.identifier.eissn1884-8044
dc.identifier.issn1345-3807
dc.identifier.urihttps://doi.org/10.5331/bgr.20R01
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100265
dc.identifier.wosidWOS:000616722300002
dc.language.isoen
dc.pagina.final24
dc.pagina.inicio13
dc.revistaBulletin of glaciological research
dc.rightsacceso restringido
dc.subjectGLOF
dc.subjectGlaciar Steffen
dc.subjectHielo Patagonico Norte
dc.subjectPatagonia
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleGLOFs of Laguna de los Tempanos, glacier-dammed side lake of Glaciar Steffen, Hielo Patagonico Norte, Chile, since 1974
dc.typeartículo
dc.volumen38
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas