Dario Trombotto - Academia.edu (original) (raw)

Papers by Dario Trombotto

... Desde el Messiniano, y po-siblemente antes, la Cordillera Austral atestigua glaciaciones (Mer... more ... Desde el Messiniano, y po-siblemente antes, la Cordillera Austral atestigua glaciaciones (Mercer & Sutter 1982). ... 6 pueden observarse los siguientes focos de análisis situmé- trioos:0-Sector Pseudomorfo: Máximo de 42 % en el grupo 4, caracteriza una estruc-tura de colapso ...

espanolLa zona de estudio se ubica entre los meridianos 69o19' y 69o26' W y los paralelos... more espanolLa zona de estudio se ubica entre los meridianos 69o19' y 69o26' W y los paralelos 32o 55' y 32o 59' S, en el Cordon del Plata, Cordillera Frontal, Mendoza, Argentina. El Cordon del Plata alcanza alturas de 6000 m snm aproximadamente, algunos de ellos comprendidos en la zona de trabajo. La cuenca del rio Vallecitos, subcuenca afluente a la del rio Blanco, se encuentra a alturas que varian desde 2.200 m en su punto mas bajo, hasta los 5.500 m snm en la cumbre del Cerro Vallecitos. Este trabajo tiene como objetivo caracterizar aguas de diversas proveniencias y diferentes composiciones hidrogeoquimicas de un ambiente criogenico tipico como es la cuenca del rio Vallecitos con glaciares cubier tos y descubiertos, glaciares de escombros, permafrost in situ y manchones de nieve temporarios y permanentes. Se pretende conocer tambien la dinamica del agua dentro del sistema criogenico, en particular en relacion a un glaciar de escombros, para determinar potenciales rese...

Remote Sensing, 2020

Permafrost is degrading under current warming conditions, disrupting infrastructure, releasing ca... more Permafrost is degrading under current warming conditions, disrupting infrastructure, releasing carbon from soils, and altering seasonal water availability. Therefore, it is important to quantitatively map the change in the extent and depth of permafrost. We used satellite images of land-surface temperature to recognize and map the zero curtain, i.e., the isothermal period of ground temperature during seasonal freeze and thaw, as a precursor for delineating permafrost boundaries from remotely sensed thermal-infrared data. The phase transition of moisture in the ground allows the zero curtain to occur when near-surface soil moisture thaws or freezes, and also when ice-rich permafrost thaws or freezes. We propose that mapping the zero curtain is a precursor to mapping permafrost at shallow depths. We used ASTER and a MODIS-Aqua daily afternoon land-surface temperature (LST) timeseries to recognize the zero curtain at the 1-km scale as a “proof of concept.” Our regional mapping of the z...

Geological Society of America Abstracts with Programs, 2017

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research, 2010

新人教版地理教科书七年级上册对第四章＂居民与聚落＂第一节＂人口与人种＂教材内容进行了较大修改和调整。就本节课而言,教材中引用的资料和数据不仅契合时代要求,更具有时效性;教学内容编排、学生活动设计... more 新人教版地理教科书七年级上册对第四章＂居民与聚落＂第一节＂人口与人种＂教材内容进行了较大修改和调整。就本节课而言,教材中引用的资料和数据不仅契合时代要求,更具有时效性;教学内容编排、学生活动设计方面也更符合初中生的认知特点。所有这些调整和变化都体现了这一地理教学理念,即让学生学习生活中有用的地理,突出了地理学习的实用性和学生地理思维能力的培养。

Revista do Instituto Geológico, 2000

Cold Regions Science and Technology, 2009

Periglacial Active layer Global warming Thermal diffusivity Central Andes of Mendoza Temperature ... more Periglacial Active layer Global warming Thermal diffusivity Central Andes of Mendoza Temperature profiles from the active layer have been analysed for 2 sites on the composed rockglacier Morenas Coloradas, Cordón del Plata, Mendoza, Argentina, using monitoring data collected between 1989 and 2008 in order to characterize the impact of global warming in the cryolithozone of the Dry Andes at these latitudes (32°-33°S). A significant change in the active layer and suprapermafrost of this rockglacier of the Cordón del Plata is registered at the monitoring sites. The observed changes imply direct consequences for the cryogenic environment and the Andean creeping permafrost. The nose of the Morenas Coloradas rockglacier for example (Balcón I, 3560 m a.s.l.), already expresses inactivity; the permafrost table is found at great depth (7.5-9 m). Data collected at Balcón I and II allow to estimate the theoretical thermal diffusivity α at the active layer of Morenas Coloradas. Thermal diffusivity may be decisive for the study of cryogenic dynamics at other altitudes and latitudes in the region where data are still scarce. Low α values (b 0.2 × 10 − 6 m 2 /s) correlate with occurrence of freezing and ice at low altitudes. While the glaciers are turning into small insignificant bodies in the high mountains, the periglacial level with creeping permafrost and linked with rockglaciers is expanding altitudinally, passing a transitional "rooting" area which is indirectly feeding the rockglaciers with their covered or "dead ice". The ice of glacigenic origin contributes to the genesis of this type of permafrost. As the permafrost table is found at greater depths, the rockglaciers need to be monitored in order to define a balance between the upper periglacial level (in terms of altitude) with mountain continuous-quasi continuous permafrost and the lower periglacial level to where the lowest fronts of creeping permafrost are reaching. The variations of the cryogenic structure of the rockglaciers of the Cordón del Plata caused by warming processes, will have direct consequences for the volume of frozen sediments and therefore for the hydrology of the entire region, a fact that has to be taken into account for future socioeconomic programs of the respective provincial governments.

Cold Regions Science and Technology, 2004

En el presente trabajo se caracterizan microcristalográficamente muestras de hielo extraídas de u... more En el presente trabajo se caracterizan microcristalográficamente muestras de hielo extraídas de un termocarst, en el área de hielo cubierto de sedimento, localizada a aproximadamente 4200 m de altura, en el Cordón del Plata de la Cordillera de los Andes, en Mendoza, Argentina. Las muestras estudiadas corresponden a dos paredes diferentes del termocarst extraídas en 1999 y 2002 respectivamente. En el laboratorio, se estudiaron el tamaño y orientación relativa de los cristales, el tamaño, la forma y distribución de las burbujas y se estimó la densidad de las dislocaciones de las muestras. Para ello se prepararon láminas delgadas, que se observaron con luz polarizada y se realizaron réplicas plásticas de la superficie de las muestras. Los resultados de la caracterización de las microcristalográfica se compararon con las observaciones geomorfológicas. A partir de los primeros resultados fue posible distinguir hielo glacigénico de hielo sedimentario

Abstract—This paper investigates the potential and limits of terrestrial photogrammetry for study... more Abstract—This paper investigates the potential and limits of terrestrial photogrammetry for studying rock glacier dynamics, and more especifically its interannual surface changes. Using a rather simple digital photogrammetric workflow, the restitution of two 3D-models was done thanks to multi-correlation (in a commercial software) of more than 100 images acquired in summers 2013 and 2014 on an active rock glacier in the Argentinian Andes. The quality of the output datasets is evaluated by comparing to GPS data, collected on artificial targets (XYZ) and along tracks (Z). Based on this results, we can consider ± 0.24 m as the margin of error that has to be taken into account to assess the surface changes between the two DEMs. Vertical differences affecting the rock glacier front over the one-year time lapse can then be quantified and interpreted in terms of geomorphological processes. I.

Investigations have been focused on the glacial history and valley development in the region of t... more Investigations have been focused on the glacial history and valley development in the region of the terminal basins Lago Argentino, Lago Viedma and the adjacent Rio Santa Cruz and Rio Shehuen Valleys, as well as on the stratigraphic classification and absolute chronology of Middle and Late Quaternary coastal deposits along the Atlantic coast of Patagonia from the Peninsula Valdes in the north to the Bay of San Julian in the south. They indicate that characteristics of Late Miocene and Early Pliocene times were the deposition of the widespread Patagonian Gravel formation and the main epirogenic uplifting, as well as the fluvial incision down to ca. 110 m above the recent valley floors, and that the oldest Andean foreland glaciations extended to the east as far as the major Pleistocene ones. Along the Patagonian Atlantic coast, which is characterized by a slow uplift trend, coastal terraces of Middle and Late Quaternary age are preserved in different elevations, probably as results of eustatic sea-level oscillations.

En el presente trabajo se caracterizan microcristalograficamente muestras de hielo extraidas de u... more En el presente trabajo se caracterizan microcristalograficamente muestras de hielo extraidas de un termocarst, en el area de hielo cubierto de sedimento, localizada a aproximadamente 4200 m de altura, en el Cordon del Plata de la Cordillera de los Andes, en Mendoza, Argentina. Las muestras estudiadas corresponden a dos paredes diferentes del termocarst extraidas en 1999 y 2002 respectivamente. En el laboratorio, se estudiaron el tamano y orientacion relativa de los cristales, el tamano, la forma y distribucion de las burbujas y se estimo la densidad de las dislocaciones de las muestras. Para ello se prepararon laminas delgadas, que se observaron con luz polarizada y se realizaron replicas plasticas de la superficie de las muestras. Los resultados de la caracterizacion de las microcristalografica se compararon con las observaciones geomorfologicas. A partir de los primeros resultados fue posible distinguir hielo glacigenico de hielo sedimentario

High-mountain environments often constitute the water towers for their adjacent lowlands, as larg... more High-mountain environments often constitute the water towers for their adjacent lowlands, as large amounts of water are stored in their glacial and periglacial zones. In contrast to clear ice glaciers of the southern Andes, the latitudes between 30-33 ̊S are predominated by rock glaciers and transitional landforms between debris-covered glaciers and rock glaciers (hereafter referred to as ice-debris complexes). Therefore, knowledge on the size, distribution, and state of activity of periglacial landforms is important, especially in arid regions where human livelihoods critically depend on meltwaters, such as the central Andes of Argentina. Close to Mendoza, one of the large population and agricultural centers, the frontal Cordillera rises sharply to nearly 6000 m asl in the Cordón del Plata range. Here, a comprehensive inventory of all glaciers, rock glaciers, ice-debris complexes and permanent snow patches is available (glaciaresargentinos.gob.ar). We exploit this inventory and qua...

... Desde el Messiniano, y po-siblemente antes, la Cordillera Austral atestigua glaciaciones (Mer... more ... Desde el Messiniano, y po-siblemente antes, la Cordillera Austral atestigua glaciaciones (Mercer & Sutter 1982). ... 6 pueden observarse los siguientes focos de análisis situmé- trioos:0-Sector Pseudomorfo: Máximo de 42 % en el grupo 4, caracteriza una estruc-tura de colapso ...

espanolLa zona de estudio se ubica entre los meridianos 69o19' y 69o26' W y los paralelos... more espanolLa zona de estudio se ubica entre los meridianos 69o19' y 69o26' W y los paralelos 32o 55' y 32o 59' S, en el Cordon del Plata, Cordillera Frontal, Mendoza, Argentina. El Cordon del Plata alcanza alturas de 6000 m snm aproximadamente, algunos de ellos comprendidos en la zona de trabajo. La cuenca del rio Vallecitos, subcuenca afluente a la del rio Blanco, se encuentra a alturas que varian desde 2.200 m en su punto mas bajo, hasta los 5.500 m snm en la cumbre del Cerro Vallecitos. Este trabajo tiene como objetivo caracterizar aguas de diversas proveniencias y diferentes composiciones hidrogeoquimicas de un ambiente criogenico tipico como es la cuenca del rio Vallecitos con glaciares cubier tos y descubiertos, glaciares de escombros, permafrost in situ y manchones de nieve temporarios y permanentes. Se pretende conocer tambien la dinamica del agua dentro del sistema criogenico, en particular en relacion a un glaciar de escombros, para determinar potenciales rese...

Remote Sensing, 2020

Permafrost is degrading under current warming conditions, disrupting infrastructure, releasing ca... more Permafrost is degrading under current warming conditions, disrupting infrastructure, releasing carbon from soils, and altering seasonal water availability. Therefore, it is important to quantitatively map the change in the extent and depth of permafrost. We used satellite images of land-surface temperature to recognize and map the zero curtain, i.e., the isothermal period of ground temperature during seasonal freeze and thaw, as a precursor for delineating permafrost boundaries from remotely sensed thermal-infrared data. The phase transition of moisture in the ground allows the zero curtain to occur when near-surface soil moisture thaws or freezes, and also when ice-rich permafrost thaws or freezes. We propose that mapping the zero curtain is a precursor to mapping permafrost at shallow depths. We used ASTER and a MODIS-Aqua daily afternoon land-surface temperature (LST) timeseries to recognize the zero curtain at the 1-km scale as a “proof of concept.” Our regional mapping of the z...

Geological Society of America Abstracts with Programs, 2017

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research, 2010

新人教版地理教科书七年级上册对第四章＂居民与聚落＂第一节＂人口与人种＂教材内容进行了较大修改和调整。就本节课而言,教材中引用的资料和数据不仅契合时代要求,更具有时效性;教学内容编排、学生活动设计... more 新人教版地理教科书七年级上册对第四章＂居民与聚落＂第一节＂人口与人种＂教材内容进行了较大修改和调整。就本节课而言,教材中引用的资料和数据不仅契合时代要求,更具有时效性;教学内容编排、学生活动设计方面也更符合初中生的认知特点。所有这些调整和变化都体现了这一地理教学理念,即让学生学习生活中有用的地理,突出了地理学习的实用性和学生地理思维能力的培养。

Revista do Instituto Geológico, 2000

Cold Regions Science and Technology, 2009

Periglacial Active layer Global warming Thermal diffusivity Central Andes of Mendoza Temperature ... more Periglacial Active layer Global warming Thermal diffusivity Central Andes of Mendoza Temperature profiles from the active layer have been analysed for 2 sites on the composed rockglacier Morenas Coloradas, Cordón del Plata, Mendoza, Argentina, using monitoring data collected between 1989 and 2008 in order to characterize the impact of global warming in the cryolithozone of the Dry Andes at these latitudes (32°-33°S). A significant change in the active layer and suprapermafrost of this rockglacier of the Cordón del Plata is registered at the monitoring sites. The observed changes imply direct consequences for the cryogenic environment and the Andean creeping permafrost. The nose of the Morenas Coloradas rockglacier for example (Balcón I, 3560 m a.s.l.), already expresses inactivity; the permafrost table is found at great depth (7.5-9 m). Data collected at Balcón I and II allow to estimate the theoretical thermal diffusivity α at the active layer of Morenas Coloradas. Thermal diffusivity may be decisive for the study of cryogenic dynamics at other altitudes and latitudes in the region where data are still scarce. Low α values (b 0.2 × 10 − 6 m 2 /s) correlate with occurrence of freezing and ice at low altitudes. While the glaciers are turning into small insignificant bodies in the high mountains, the periglacial level with creeping permafrost and linked with rockglaciers is expanding altitudinally, passing a transitional "rooting" area which is indirectly feeding the rockglaciers with their covered or "dead ice". The ice of glacigenic origin contributes to the genesis of this type of permafrost. As the permafrost table is found at greater depths, the rockglaciers need to be monitored in order to define a balance between the upper periglacial level (in terms of altitude) with mountain continuous-quasi continuous permafrost and the lower periglacial level to where the lowest fronts of creeping permafrost are reaching. The variations of the cryogenic structure of the rockglaciers of the Cordón del Plata caused by warming processes, will have direct consequences for the volume of frozen sediments and therefore for the hydrology of the entire region, a fact that has to be taken into account for future socioeconomic programs of the respective provincial governments.

Cold Regions Science and Technology, 2004

En el presente trabajo se caracterizan microcristalográficamente muestras de hielo extraídas de u... more En el presente trabajo se caracterizan microcristalográficamente muestras de hielo extraídas de un termocarst, en el área de hielo cubierto de sedimento, localizada a aproximadamente 4200 m de altura, en el Cordón del Plata de la Cordillera de los Andes, en Mendoza, Argentina. Las muestras estudiadas corresponden a dos paredes diferentes del termocarst extraídas en 1999 y 2002 respectivamente. En el laboratorio, se estudiaron el tamaño y orientación relativa de los cristales, el tamaño, la forma y distribución de las burbujas y se estimó la densidad de las dislocaciones de las muestras. Para ello se prepararon láminas delgadas, que se observaron con luz polarizada y se realizaron réplicas plásticas de la superficie de las muestras. Los resultados de la caracterización de las microcristalográfica se compararon con las observaciones geomorfológicas. A partir de los primeros resultados fue posible distinguir hielo glacigénico de hielo sedimentario

Abstract—This paper investigates the potential and limits of terrestrial photogrammetry for study... more Abstract—This paper investigates the potential and limits of terrestrial photogrammetry for studying rock glacier dynamics, and more especifically its interannual surface changes. Using a rather simple digital photogrammetric workflow, the restitution of two 3D-models was done thanks to multi-correlation (in a commercial software) of more than 100 images acquired in summers 2013 and 2014 on an active rock glacier in the Argentinian Andes. The quality of the output datasets is evaluated by comparing to GPS data, collected on artificial targets (XYZ) and along tracks (Z). Based on this results, we can consider ± 0.24 m as the margin of error that has to be taken into account to assess the surface changes between the two DEMs. Vertical differences affecting the rock glacier front over the one-year time lapse can then be quantified and interpreted in terms of geomorphological processes. I.

Investigations have been focused on the glacial history and valley development in the region of t... more Investigations have been focused on the glacial history and valley development in the region of the terminal basins Lago Argentino, Lago Viedma and the adjacent Rio Santa Cruz and Rio Shehuen Valleys, as well as on the stratigraphic classification and absolute chronology of Middle and Late Quaternary coastal deposits along the Atlantic coast of Patagonia from the Peninsula Valdes in the north to the Bay of San Julian in the south. They indicate that characteristics of Late Miocene and Early Pliocene times were the deposition of the widespread Patagonian Gravel formation and the main epirogenic uplifting, as well as the fluvial incision down to ca. 110 m above the recent valley floors, and that the oldest Andean foreland glaciations extended to the east as far as the major Pleistocene ones. Along the Patagonian Atlantic coast, which is characterized by a slow uplift trend, coastal terraces of Middle and Late Quaternary age are preserved in different elevations, probably as results of eustatic sea-level oscillations.

En el presente trabajo se caracterizan microcristalograficamente muestras de hielo extraidas de u... more En el presente trabajo se caracterizan microcristalograficamente muestras de hielo extraidas de un termocarst, en el area de hielo cubierto de sedimento, localizada a aproximadamente 4200 m de altura, en el Cordon del Plata de la Cordillera de los Andes, en Mendoza, Argentina. Las muestras estudiadas corresponden a dos paredes diferentes del termocarst extraidas en 1999 y 2002 respectivamente. En el laboratorio, se estudiaron el tamano y orientacion relativa de los cristales, el tamano, la forma y distribucion de las burbujas y se estimo la densidad de las dislocaciones de las muestras. Para ello se prepararon laminas delgadas, que se observaron con luz polarizada y se realizaron replicas plasticas de la superficie de las muestras. Los resultados de la caracterizacion de las microcristalografica se compararon con las observaciones geomorfologicas. A partir de los primeros resultados fue posible distinguir hielo glacigenico de hielo sedimentario

High-mountain environments often constitute the water towers for their adjacent lowlands, as larg... more High-mountain environments often constitute the water towers for their adjacent lowlands, as large amounts of water are stored in their glacial and periglacial zones. In contrast to clear ice glaciers of the southern Andes, the latitudes between 30-33 ̊S are predominated by rock glaciers and transitional landforms between debris-covered glaciers and rock glaciers (hereafter referred to as ice-debris complexes). Therefore, knowledge on the size, distribution, and state of activity of periglacial landforms is important, especially in arid regions where human livelihoods critically depend on meltwaters, such as the central Andes of Argentina. Close to Mendoza, one of the large population and agricultural centers, the frontal Cordillera rises sharply to nearly 6000 m asl in the Cordón del Plata range. Here, a comprehensive inventory of all glaciers, rock glaciers, ice-debris complexes and permanent snow patches is available (glaciaresargentinos.gob.ar). We exploit this inventory and qua...