Listar DAgr-Artículos, capítulos... por autor "0c9e95ed-b6a1-49d3-89d3-ce682f3dd6e3"
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Analysis of snow spatial and temporary variability through the study of terrestrial photography in the Trevelez river valley
Pérez Palazón, Mª José; Pimentel, Rafael; Herrero, Javier; Polo, María José (SPIE, 2014)The spatiotemporal evolution of the snow cover may help to obtain conclusions on the variability of the atmospheric agents in high mountain areas. That evolution is difficult to analyze due to the heterogeneity of the snow ... -
Characterizing snow dynamics in semi-arid mountain regions with multitemporal sentinel-1 imagery: a case study in the Sierra Nevada, Spain
Torralbo, Pedro; Pimentel, Rafael; Polo, María José; Notarnicola, Claudia (MDPI, 2023)Monitoring snowmelt dynamics in mountains is crucial to understand water releases downstream. Sentinel-1 (S-1) synthetic-aperture radar (SAR) has become one of the most widely used techniques to achieve this aim due to its ... -
Combining remote sensing and terrestrial photography in a snowmelt modeling framework to retrieve snow evolution in a semiarid region
Polo, María José; Herrero, Javier; Pimentel, Rafael; Pérez Palazón, Mª José; Gilabert, A.; Torralbo, Pedro (IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018)This work shows the strength of combining different data sources and modelling to generate long time map series of snow variables in Sierra Nevada (Spain), an alpine environment within a semiarid region in which the snowpack ... -
Estimating snow albedo patterns in a Mediterranean site from Landsat TM and ETM+ images
Pimentel, Rafael; Herrero, Javier; Polo, María José (SPIE, 2013)The albedo of snow affects the shortwave radiative flux at the land-atmosphere interface, so that it therefore plays an important role in the snow mass and energy balance. In semiarid areas, their particular climate ... -
Extreme values of snow-related variables in Mediterranean regions: trends and long-term forecasting in Sierra Nevada (Spain)
Pérez Palazón, Mª José; Pimentel, Rafael; Herrero, Javier; Aguilar, Carmen; Perales, J.M.; Polo, María José (International Association of Hydrological Sciences, 2015)Mountain areas in Mediterranean regions constitute key monitoring points for climate variability and its impacts, but long time datasets are not always available due to the difficult access to high areas, relevant ... -
Snow evolution in a semi-arid mountainous area combining snow modelling and Landsat spectral mixture analysis
Pimentel, Rafael; Herrero, Javier; Polo, María José (Copernicus, 2015)This study proposes the use of both physically-distributed hydrological modelling in combination with satellite remote sensing images, to study the evolution of the snowpack in the Sierra Nevada mountains, in southern ... -
Stochastic Flow Analysis for Optimization of the Operationality in Run-of-River Hydroelectric Plants in Mountain Areas
Gómez Beas, Raquel; Contreras Arribas, Eva; Polo, María José; Aguilar Porro, Cristina (MDPI, 2024)The highly temporal variability of the hydrological response in Mediterranean areas affects the operation of hydropower systems, especially in run-of-river (RoR) plants located in mountainous areas. Here, the water flow ... -
Study of snow dynamics at subgrid scale in semiarid environments combining terrestrial photography and data assimilation techniques
Pimentel, Rafael; Herrero, Javier; Zeng, Yijian; Su, Zhongbo; Polo, María José (American Meteorology Society, 2015)Snow cover simulation is a complex task in mountain regions because of its highly irregular distribution. GIS-based calculations of snowmelt–accumulation models must deal with nonnegligible scale effects below cell size, ... -
Subgrid parameterization of snow distribution at a Mediterranean site using terrestrial photography
Pimentel, Rafael; Herrero, Javier; Polo, María José (EGU, 2017)Subgrid variability introduces non-negligible scale effects on the grid-based representation of snow. This heterogeneity is even more evident in semiarid regions, where the high variability of the climate produces various ... -
Validating improved-MODIS products from spectral mixture-Landsat snow cover maps in a mountain region in southern Spain
Pimentel, Rafael; Marín, Carlo; De Gregorio, Ludovica; Callegari, Mattia; Pérez Palazón, Mª José; Notarnicola, Claudia; Polo, María José (International Association of Hydrological Sciences, 2018)Remote sensing is the only feasible data source for distributed modelling of snow in mountain regions on medium to large scales, due to the limited access to these areas together with the lack of dense ground monitoring ...