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Can the snowline be used as an indicator of the equilibrium line and mass balance for glaciers in the outer tropics?

dc.contributor.authorRabatel, Antoine
dc.contributor.authorBermejo, Ana
dc.contributor.authorLoarte Cadenas, Edwin
dc.contributor.authorSoruco, Alvaro
dc.contributor.authorGómez López, Jesús
dc.contributor.authorLeonardini, Gonzalo
dc.contributor.authorVincent, Christian
dc.contributor.authorSicart, Jean Emmanuel
dc.coverage.spatialCordillera Blanca
dc.date.accessioned2019-01-11T20:25:14Z
dc.date.available2019-01-11T20:25:14Z
dc.date.issued2012
dc.identifier.citationRabatel, A., Bermejo, A., Loarte, E. et. al. (2012) Can the snowline be used as an indicator of the equilibrium line and mass balance for glaciers in the outer tropics? Journal of Glaciology, 58(212), 2017-1036. doi: https://doi.org/10.3189/2012JoG12J027es_PE
dc.identifier.issnISSN: 0022-1430, ESSN: 1727-5652es_PE
dc.identifier.urihttps://hdl.handle.net/20.500.12543/3234
dc.descriptionOriginal abstract: Because the glacier snowline is easy to identify on optical satellite images and because in certain conditions it can be used as an indicator of the equilibrium line, it may be a relevant parameter for the study of the relationships between climate and glaciers. Although several studies have shown that the snowline altitude (SLA) at the end of the hydrological year is a good indicator of the equilibrium-line altitude (ELA) for mid-latitude glaciers, such a relationship remains conjectural for tropical glaciers. Indeed, unlike in mid-latitudes, tropical climate conditions result in a distinct seasonality of accumulation/ablation processes. We examine this relationship using direct field ELA and mass-balance measurements made on Glaciar Zongo, Bolivia (~16° S), vand Glaciar Artesonraju, Peru (~9° S), and the SLA retrieved from satellite images acquired in the past two decades. We show that on glaciers in the outer tropics: (1) ablation is reduced during the dry season in austral winter (May-August), the SLA does not change much, and satellite images acquired between May and August could be used to compute the SLA; and (2) the highest SLA detected on a number of satellite images acquired during the dry season provides a good estimate of the annual ELA. However, as snowfall events can occur during the dry season, the SLA detected on satellite images tends to underestimate the ELA. Thus, we recommend validating the SLA computed from satellite images with field data collected on a benchmark glacier before measuring the SLA on other glaciers in the same mountain range for which no field data are available. This study is a major step towards extending the measurement of glacier parameters (ELA and mass balance) at the scale of a whole mountain range in the outer tropics to better document the relationships between climate and glaciers.es_PE
dc.descriptionArtículo en acceso abiertoes_PE
dc.description.abstractEstudia la Altitud de la Línea de Nieve (SLA) como un indicador relevante para el estudio de las relaciones entre el clima y los glaciares y para el análisis de la altitud de la línea de equilibrio (ELA).es_PE
dc.formatapplication/pdfes_PE
dc.language.isoenges_PE
dc.publisherCUPes_PE
dc.relation.ispartofseriesJournal of Glaciology,2012, Volume 58, Issue 212 pp 1027-1036es_PE
dc.relation.urihttps://www.cambridge.org/core/journals/journal-of-glaciology/article/can-the-snowline-be-used-as-an-indicator-of-the-equilibrium-line-and-mass-balance-for-glaciers-in-the-outer-tropics/251F4593F3A87974962CCA8AA2226A33
dc.rightsinfo:eu-repo/semantics/openAccesses_PE
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.sourceAutoridad Nacional del Aguaes_PE
dc.sourceRepositorio institucional - ANAes_PE
dc.subjectClimatologíaes_PE
dc.subjectMonitoreo de lagunas y glaciareses_PE
dc.titleCan the snowline be used as an indicator of the equilibrium line and mass balance for glaciers in the outer tropics?es_PE
dc.typeinfo:eu-repo/semantics/articlees_PE
dc.identifier.doihttps://doi.org/10.3189/2012JoG12J027es_PE


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