1
artículo
Publicado 2013
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Original abstract: The aim of this paper is to provide the community with a comprehensive overview of the studies of glaciers in the tropical Andes conducted in recent decades leading to the current status of the glaciers in the context of climate change. In terms of changes in surface area and length, we show that the glacier retreat in the tropical Andes over the last three decades is unprecedented since the maximum extension of the Little Ice Age (LIA, mid-17th–early 18th century). In terms of changes in mass balance, although there have been some sporadic gains on several glaciers, we show that the trend has been quite negative over the past 50 yr, with a mean mass balance deficit for glaciers in the tropical Andes that is slightly more negative than the one computed on a global scale. A break point in the trend appeared in the late 1970s with mean annual mass balance per year decr...
2
artículo
Publicado 2012
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Original 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 ...
3
artículo
Publicado 2015
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Original abstract: En los últimos años, a consecuencia del cambio climático se están registrando diversas alteraciones en los ecosistemas; uno de estos cambios se evidencia sobre los glaciares, provocando la fusión acelerada de sus masas de hielo y nieve, consecuentemente genera diversos riesgos para las poblaciones y con ictos por la disponibilidad del agua. En esta investigación se plantea determinar la variación espacio temporal de la Altitud de la Línea de Equilibrio (ELA) obtenida a través de la Altitud de la Línea de Nieve (SLA) de los glaciares de la Cordillera Blanca. Para ello se seleccionó 17 glaciares de donde se obtuvieron valores de SLA, durante el periodo 2001 2010, mediante análisis y técnicas de procesamiento de imágenes satelitales para la discriminación entre hielo y nieve. Para la validación se utilizó información de 4 glaciares de la Cordillera Blanc...
4
ponencia
Publicado 2021
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This study focused on estimating precipitation for the Santa basin located north of the capital of Peru, assessing spatial patterns and temporal variation. Precipitation products were used at a daily temporal resolution obtained from remote sensing datasets, including CHIRPS, PERSIANN-CCS, GPM and PISCO, altitude and vegetation products as NDVI-BOKU and GDEM. Also ground-based precipitation data from weather stations were collected from 35 meteorological stations (2012 -2019)
