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Enrique Serrano - One of the best experts on this subject based on the ideXlab platform.
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morfodinamica periglaciar en el grupo pena vieja macizo central de los picos de europa cantabria
Cuaternario y Geomorfología, 2012Co-Authors: Enrique Serrano, J J GonzalezAbstract:The high Mountain Environment of the Pena Vieja Group, located above 1.900 m. in the Central massif of Picos de Europa (Cantabrian Range), is characterised by a nivoperiglacial Environment. In this work we have made a detailed geomorphological map, surficial morphological analysis and basal temperatures of snow measurements. On the study area there are different landforms related to fourteen crionival processes. The periglacial morphodynamic on Picos de Europa is linked to the depth and changes of snow cover, and the most important geomorphic processes are the nivation, karstification, solifluction and gelifraction. In this work two periglacial altitudinal belts have been defined: nivoperiglacial belt (1.900-2.300 m) and crionival belt (2.300-2.613 m). The BTS measurements point out the non-existence of Environmental conditions to get continuous or discontinuous permafrost development.
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ice patch origin evolution and dynamics in a temperate high Mountain Environment the jou negro picos de europa nw spain
Geografiska Annaler Series A-physical Geography, 2011Co-Authors: Enrique Serrano, Juan Jose Gonzaleztrueba, Jose Juan De Sanjose, Luis M Del RioAbstract:Serrano, E., Gonzalez‐Trueba, J.J., Sanjose, J.J. and Del Rio, L.M., 2011. Ice patch origin, evolution and dynamics in a temperate high Mountain Environment: the Jou Negro, Picos de Europa (NW Spai...
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rock glacier dynamics in a marginal periglacial high Mountain Environment flow movement 1991 2000 and structure of the argualas rock glacier the pyrenees
Geomorphology, 2006Co-Authors: Enrique Serrano, J San J Jose, C AgudoAbstract:The Argualas rock glacier is located on the southern side of the Central Pyrenees (Argualas massif). Vertical electric sounding, debris surface analysis and a topographic survey were performed on this rock glacier between 1991 and 2000. High precision measurement records were obtained using a total station. Horizontal and vertical movements of the rock glacier were measured by means of sixteen steel rods. Horizontal and vertical angles and distances to each rod were measured from three stations on a bedrock ridge. Total and annual average displacements were derived from the emergence value and the horizontal displacement of each rod. Then the horizontal and vertical displacement rates in different sectors of the rock glacier were compared. The inferred surface deformation was characterized by both extensional and compressive flows as well as thinning of the frozen body. The displacement rates showed temporal variations related to atmospheric thermal changes, pointing to a high sensibility of the rock glacier.
A Cochachin - One of the best experts on this subject based on the ideXlab platform.
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spatio temporal assessment of wrf trmm and in situ precipitation data in a tropical Mountain Environment cordillera blanca peru
Hydrology and Earth System Sciences, 2016Co-Authors: L Mourre, Thomas Condom, Clementine Junquas, Thierry Lebel, Jeanemmanuel Sicart, R Figueroa, A CochachinAbstract:Abstract. The estimation of precipitation over the broad range of scales of interest for climatologists, meteorologists and hydrologists is challenging at high altitudes of tropical regions, where the spatial variability of precipitation is important while in situ measurements remain scarce largely due to operational constraints. Three different types of rainfall products – ground based (kriging interpolation), satellite derived (TRMM3B42), and atmospheric model outputs (WRF – Weather Research and Forecasting) – are compared for 1 hydrological year in order to retrieve rainfall patterns at timescales ranging from sub-daily to annual over a watershed of approximately 10 000 km2 in Peru. An ensemble of three different spatial resolutions is considered for the comparison (27, 9 and 3 km), as long as well as a range of timescales (annual totals, daily rainfall patterns, diurnal cycle). WRF simulations largely overestimate the annual totals, especially at low spatial resolution, while reproducing correctly the diurnal cycle and locating the spots of heavy rainfall more realistically than either the ground-based KED or the Tropical Rainfall Measuring Mission (TRMM) products. The main weakness of kriged products is the production of annual rainfall maxima over the summit rather than on the slopes, mainly due to a lack of in situ data above 3800 m a. s. l. This study also confirms that one limitation of TRMM is its poor performance over ice-covered areas because ice on the ground behaves in a similar way as rain or ice drops in the atmosphere in terms of scattering the microwave energy. While all three products are able to correctly represent the spatial rainfall patterns at the annual scale, it not surprisingly turns out that none of them meets the challenge of representing both accumulated quantities of precipitation and frequency of occurrence at the short timescales (sub-daily and daily) required for glacio-hydrological studies in this region. It is concluded that new methods should be used to merge various rainfall products so as to make the most of their respective strengths.
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spatio temporal assessment of wrf trmm and in situ precipitation data in a tropical Mountain Environment cordillera blanca peru
Hydrology and Earth System Sciences, 2015Co-Authors: L Mourre, Thomas Condom, Clementine Junquas, Thierry Lebel, Jeanemmanuel Sicart, R Figueroa, A CochachinAbstract:Abstract. The estimation of precipitation over the broad range of scales of interest for climatologists, meteorologists and hydrologists is challenging at high altitudes of tropical regions, where the spatial variability of precipitation is important while in situ measurements remain scarce largely due to operational constraints. Three different types of rainfall products – ground based (kriging interpolation), satellite derived (TRMM3B42), and atmospheric model outputs (WRF – Weather Research and Forecasting) – are compared for 1 hydrological year in order to retrieve rainfall patterns at timescales ranging from sub-daily to annual over a watershed of approximately 10 000 km2 in Peru. An ensemble of three different spatial resolutions is considered for the comparison (27, 9 and 3 km), as long as well as a range of timescales (annual totals, daily rainfall patterns, diurnal cycle). WRF simulations largely overestimate the annual totals, especially at low spatial resolution, while reproducing correctly the diurnal cycle and locating the spots of heavy rainfall more realistically than either the ground-based KED or the Tropical Rainfall Measuring Mission (TRMM) products. The main weakness of kriged products is the production of annual rainfall maxima over the summit rather than on the slopes, mainly due to a lack of in situ data above 3800 m a. s. l. This study also confirms that one limitation of TRMM is its poor performance over ice-covered areas because ice on the ground behaves in a similar way as rain or ice drops in the atmosphere in terms of scattering the microwave energy. While all three products are able to correctly represent the spatial rainfall patterns at the annual scale, it not surprisingly turns out that none of them meets the challenge of representing both accumulated quantities of precipitation and frequency of occurrence at the short timescales (sub-daily and daily) required for glacio-hydrological studies in this region. It is concluded that new methods should be used to merge various rainfall products so as to make the most of their respective strengths.
Guyon Frédérick - One of the best experts on this subject based on the ideXlab platform.
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Les représentations du risque avalancheux chez les pratiquants d’activités récréatives hivernales du Massif vosgien
Journal of Alpine research Revue de géographie alpine, 2021Co-Authors: Giacona Florie, Guyon FrédérickAbstract:Si de nombreux travaux ont questionné la notion de risque, peu ont porté sur les avalanches dans les massifs de moyenne montagne alors que de tels phénomènes s’y produisent régulièrement. Cet article s’interroge sur l’appréhension du risque lié aux avalanches dans le Massif vosgien (nord-est de la France) chez les pratiquants d’activités récréatives hivernales, principaux concernés par le risque. Une enquête par questionnaire vise à vérifier que leurs représentations du massif et du risque sont influencées par leur culture sportive et leur culture montagne. L’analyse de l’échantillon (N =376) met en avant la coexistence de connaissances et de représentations diversifiées du risque d’avalanche. Néanmoins, nombre de pratiquants ne détiennent pas de culture du risque d’avalanche, au sens d’une acquisition de connaissances du phénomène et du risque associé, conduisant à la conscience de leur exposition et d’une appropriation du risque qu’ils encourent. Il y a ainsi absence de construction du risque d’avalanche dans le Massif vosgien liée à une absence d’identification de la vulnérabilité.Whereas numerous studies questioned the risk concept in France, few so far focused on medium-high altitude avalanches, even though those occur on a regular basis. This article studies how winter outdoor activities practitioners apprehend avalanche risk in the Vosges Mountains (north-east France). Our survey demonstrates that their perception of both the Mountain Environment and avalanche risk is influenced by their culture of sports and Mountains in general. Analysis shows a diversity of knowledge and perception of the risk. However, a significant number of practitioners (including hikers, skiers or Mountaineers) seem to have no culture at all of avalanche risk, which is preventing them from realizing they are exposed. As a consequence, one can say that this lack of feeling vulnerable has led to an absence of mental construction of avalanche risk in the Vosges Mountains
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Les représentations du risque avalancheux chez les pratiquants d’activités récréatives hivernales du Massif vosgien
Association pour la diffusion de la recherche alpine, 2021Co-Authors: Giacona Florie, Guyon FrédérickAbstract:International audienceWhereas numerous studies questioned the risk concept in France, few so far focused on medium-high altitude avalanches, even though those occur on a regular basis. This article studies how winter outdoor activities practitioners apprehend avalanche risk in the Vosges Mountains (north-east France). Our survey demonstrates that their perception of both the Mountain Environment and avalanche risk is influenced by their culture of sports and Mountains in general. Analysis shows a diversity of knowledge and perception of the risk. However, a significant number of practitioners (including hikers, skiers or Mountaineers) seem to have no culture at all of avalanche risk, which is preventing them from realizing they are exposed. As a consequence, one can say that this lack of feeling vulnerable has led to an absence of mental construction of avalanche risk in the Vosges Mountains.Si de nombreux travaux ont questionné la notion de risque, peu ont porté sur les avalanches dans les massifs de moyenne montagne alors que de tels phénomènes s’y produisent régulièrement. Cet article s’interroge sur l’appréhension du risque lié aux avalanches dans le Massif vosgien (nord-est de la France) chez les pratiquants d’activités récréatives hivernales, principaux concernés par le risque. Une enquête par questionnaire vise à vérifier que leurs représentations du massif et du risque sont influencées par leur culture sportive et leur culture montagne. L’analyse de l’échantillon (N =376) met en avant la coexistence de connaissances et de représentations diversifiées du risque d’avalanche. Néanmoins, nombre de pratiquants ne détiennent pas de culture du risque d’avalanche, au sens d’une acquisition de connaissances du phénomène et du risque associé, conduisant à la conscience de leur exposition et d’une appropriation du risque qu’ils encourent. Il y a ainsi absence de construction du risque d’avalanche dans le Massif vosgien liée à une absence d’identification de la vulnérabilité
Cristina Garciahernandez - One of the best experts on this subject based on the ideXlab platform.
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soil temperatures in an atlantic high Mountain Environment the forcadona buried ice patch picos de europa nw spain
Catena, 2017Co-Authors: Jesus Ruizfernandez, Marc Oliva, Filip Hrbacek, Goncalo Vieira, Cristina GarciahernandezAbstract:The present study focuses on the analysis of the ground and near-rock surface air thermal conditions at the Forcadona glacial cirque (2227 m a.s.l.) located in the Western Massif of the Picos de Europa, Spain. Temperatures have been monitored in three distinct geomorphological and topographical sites in the Forcadona area over the period 2006–11. The Forcadona buried ice patch is the remnant of a Little Ice Age glacier located in the bottom of a glacial cirque. Its location in a deep cirque determines abundant snow accumulation, with snow cover between 8 and 12 months. The presence of snow favours stable soil temperatures and geomorphic stability. Similarly to other Cantabrian Mountains, the annual thermal regime of the soil is defined by two seasonal periods (continuous thaw with daily oscillations and isothermal regime), as well as two short transition periods. However, the results showed evidence of a significantly different annual thermal regime at the ground and near-rock surface air. Relatively stable soil thermal regimes were observed at the moraine and talus sites, while a more dynamic pattern was recorded at the rock wall site. Here, a higher interannual variability in the number of freeze–thaw days was also detected, which showed evidence of the important role of the snow cover as a ground surface insulator in the area. Seasonal frost conditions are widespread today in the high lands of the massif. No permafrost regime was detected in the area, though mean temperatures measured at 0.5 m depth at the Forcadona buried ice patch during 2006–07 (0.1 °C) suggest that permanent negative values may be reached at deeper layers.
L Mourre - One of the best experts on this subject based on the ideXlab platform.
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spatio temporal assessment of wrf trmm and in situ precipitation data in a tropical Mountain Environment cordillera blanca peru
Hydrology and Earth System Sciences, 2016Co-Authors: L Mourre, Thomas Condom, Clementine Junquas, Thierry Lebel, Jeanemmanuel Sicart, R Figueroa, A CochachinAbstract:Abstract. The estimation of precipitation over the broad range of scales of interest for climatologists, meteorologists and hydrologists is challenging at high altitudes of tropical regions, where the spatial variability of precipitation is important while in situ measurements remain scarce largely due to operational constraints. Three different types of rainfall products – ground based (kriging interpolation), satellite derived (TRMM3B42), and atmospheric model outputs (WRF – Weather Research and Forecasting) – are compared for 1 hydrological year in order to retrieve rainfall patterns at timescales ranging from sub-daily to annual over a watershed of approximately 10 000 km2 in Peru. An ensemble of three different spatial resolutions is considered for the comparison (27, 9 and 3 km), as long as well as a range of timescales (annual totals, daily rainfall patterns, diurnal cycle). WRF simulations largely overestimate the annual totals, especially at low spatial resolution, while reproducing correctly the diurnal cycle and locating the spots of heavy rainfall more realistically than either the ground-based KED or the Tropical Rainfall Measuring Mission (TRMM) products. The main weakness of kriged products is the production of annual rainfall maxima over the summit rather than on the slopes, mainly due to a lack of in situ data above 3800 m a. s. l. This study also confirms that one limitation of TRMM is its poor performance over ice-covered areas because ice on the ground behaves in a similar way as rain or ice drops in the atmosphere in terms of scattering the microwave energy. While all three products are able to correctly represent the spatial rainfall patterns at the annual scale, it not surprisingly turns out that none of them meets the challenge of representing both accumulated quantities of precipitation and frequency of occurrence at the short timescales (sub-daily and daily) required for glacio-hydrological studies in this region. It is concluded that new methods should be used to merge various rainfall products so as to make the most of their respective strengths.
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spatio temporal assessment of wrf trmm and in situ precipitation data in a tropical Mountain Environment cordillera blanca peru
Hydrology and Earth System Sciences, 2015Co-Authors: L Mourre, Thomas Condom, Clementine Junquas, Thierry Lebel, Jeanemmanuel Sicart, R Figueroa, A CochachinAbstract:Abstract. The estimation of precipitation over the broad range of scales of interest for climatologists, meteorologists and hydrologists is challenging at high altitudes of tropical regions, where the spatial variability of precipitation is important while in situ measurements remain scarce largely due to operational constraints. Three different types of rainfall products – ground based (kriging interpolation), satellite derived (TRMM3B42), and atmospheric model outputs (WRF – Weather Research and Forecasting) – are compared for 1 hydrological year in order to retrieve rainfall patterns at timescales ranging from sub-daily to annual over a watershed of approximately 10 000 km2 in Peru. An ensemble of three different spatial resolutions is considered for the comparison (27, 9 and 3 km), as long as well as a range of timescales (annual totals, daily rainfall patterns, diurnal cycle). WRF simulations largely overestimate the annual totals, especially at low spatial resolution, while reproducing correctly the diurnal cycle and locating the spots of heavy rainfall more realistically than either the ground-based KED or the Tropical Rainfall Measuring Mission (TRMM) products. The main weakness of kriged products is the production of annual rainfall maxima over the summit rather than on the slopes, mainly due to a lack of in situ data above 3800 m a. s. l. This study also confirms that one limitation of TRMM is its poor performance over ice-covered areas because ice on the ground behaves in a similar way as rain or ice drops in the atmosphere in terms of scattering the microwave energy. While all three products are able to correctly represent the spatial rainfall patterns at the annual scale, it not surprisingly turns out that none of them meets the challenge of representing both accumulated quantities of precipitation and frequency of occurrence at the short timescales (sub-daily and daily) required for glacio-hydrological studies in this region. It is concluded that new methods should be used to merge various rainfall products so as to make the most of their respective strengths.