Search

Your search keyword '"Falaschi, Daniel"' showing total 44 results
Start Over Author "Falaschi, Daniel"
44 results on '"Falaschi, Daniel"'

1. Observing glacier elevation changes from spaceborne optical and radar sensors – an inter-comparison experiment using ASTER and TanDEM-X data.

Author

Piermattei, Livia, Zemp, Michael, Sommer, Christian, Brun, Fanny, Braun, Matthias H., Andreassen, Liss M., Belart, Joaquín M. C., Berthier, Etienne, Bhattacharya, Atanu, Boehm Vock, Laura, Bolch, Tobias, Dehecq, Amaury, Dussaillant, Inés, Falaschi, Daniel, Florentine, Caitlyn, Floricioiu, Dana, Ginzler, Christian, Guillet, Gregoire, Hugonnet, Romain, and Huss, Matthias

Subjects
OPTICAL radar, RADAR interferometry, ASTER (Advanced spaceborne thermal emission & reflection radiometer), DIGITAL elevation models, OPTICAL sensors, SPACE-based radar, GLACIERS, SYNTHETIC aperture radar
Abstract

Observations of glacier mass changes are key to understanding the response of glaciers to climate change and related impacts, such as regional runoff, ecosystem changes, and global sea level rise. Spaceborne optical and radar sensors make it possible to quantify glacier elevation changes, and thus multi-annual mass changes, on a regional and global scale. However, estimates from a growing number of studies show a wide range of results with differences often beyond uncertainty bounds. Here, we present the outcome of a community-based inter-comparison experiment using spaceborne optical stereo (ASTER) and synthetic aperture radar interferometry (TanDEM-X) data to estimate elevation changes for defined glaciers and target periods that pose different assessment challenges. Using provided or self-processed digital elevation models (DEMs) for five test sites, 12 research groups provided a total of 97 spaceborne elevation-change datasets using various processing approaches. Validation with airborne data showed that using an ensemble estimate is promising to reduce random errors from different instruments and processing methods but still requires a more comprehensive investigation and correction of systematic errors. We found that scene selection, DEM processing, and co-registration have the biggest impact on the results. Other processing steps, such as treating spatial data voids, differences in survey periods, or radar penetration, can still be important for individual cases. Future research should focus on testing different implementations of individual processing steps (e.g. co-registration) and addressing issues related to temporal corrections, radar penetration, glacier area changes, and density conversion. Finally, there is a clear need for our community to develop best practices, use open, reproducible software, and assess overall uncertainty to enhance inter-comparison and empower physical process insights across glacier elevation-change studies. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

3. Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau.

Author

Falaschi, Daniel, Bhattacharya, Atanu, Guillet, Gregoire, Huang, Lei, King, Owen, Mukherjee, Kriti, Rastner, Philipp, Yao, Tandong, and Bolch, Tobias

Subjects
*MASS budget (Geophysics), *GLACIERS, *STEREO image, *DIGITAL elevation models
Abstract

Glaciers are crucial sources of freshwater in particular for the arid lowlands surrounding High Mountain Asia. To better constrain glacio-hydrological models, annual, or even better, seasonal information about glacier mass changes is highly beneficial. In this study, we evaluate the suitability of very-high-resolution Pléiades digital elevation models (DEMs) to measure glacier mass balance at annual and seasonal scales in two regions of High Mountain Asia (Muztagh Ata in Eastern Pamirs and parts of western Nyainqêntanglha, south-central Tibetan Plateau), where recent estimates have shown contrasting glacier behaviour. The average annual mass balance in Muztagh Ata between 2019 and 2022 was -0.07 ± 0.20 m w.e. a -1 , suggesting the continuation of a recent phase of slight mass loss following a prolonged period of balanced mass budgets previously observed. The mean annual mass balance in western Nyainqêntanglha was highly negative for the same period (-0.60 ± 0.15 m w.e. a -1), suggesting increased mass loss rates compared to the approximately previous 5 decades. The 2022 winter (+0.13 ± 0.24 m w.e.) and summer (-0.35 ± 0.15 m w.e.) mass budgets in Muztagh Ata and western Nyainqêntanglha (-0.03 ± 0.27 m w.e. in winter; -0.63 ± 0.07 m w.e. in summer) suggest winter- and summer-accumulation-type regimes, respectively. We support our findings by implementing the Sentinel-1-based Glacier Index to identify the firn and wet-snow areas on glaciers and characterize the accumulation type. The good match between the geodetic and Glacier Index results supports the potential of very-high-resolution Pléiades data to monitor mass balance at short timescales and improves our understanding of glacier accumulation regimes across High Mountain Asia. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

5. Observing glacier elevation changes from spaceborne optical and radar sensors - an inter-comparison experiment using ASTER and TanDEM-X data.

Author

Piermattei, Livia, Zemp, Michael, Sommer, Christian, Brun, Fanny, Braun, Matthias H., Andreassen, Liss M., Belart, Joaquín M.C., Berthier, Etienne, Bhattacharya, Atanu, Vock, Laura Boehm, Bolch, Tobias, Dehecq, Amaury, Dussaillant, Inés, Falaschi, Daniel, Florentine, Caitlyn, Floricioiu, Dana, Ginzler, Christian, Guillet, Gregoire, Hugonnet, Romain, and Huss, Matthias

Abstract

Observations of glacier mass changes are key to understanding the response of glaciers to climate change and related impacts, such as regional runoff, ecosystem changes, and global sea-level rise. Spaceborne optical and radar sensors make it possible to quantify glacier elevation changes, and thus multi-annual mass changes, on a regional and global scale. However, estimates from a growing number of studies show a wide range of results with differences often beyond uncertainty bounds. Here, we present the outcome of a community-based inter-comparison experiment using spaceborne optical stereo (ASTER) and synthetic aperture radar interferometry (TanDEM-X) data to estimate elevation changes for defined glaciers and target periods that pose different assessment challenges. Using provided or self-processed digital elevation models (DEMs) for five test sites, 12 research groups provided a total of 97 spaceborne elevation-change datasets using various processing strategies. Validation with airborne data showed that using an ensemble estimate is promising to reduce random errors from different instruments and processing methods, but still requires a more comprehensive investigation and correction of systematic errors. We found that scene selection, DEM processing, and co-registration have the biggest impact on the results. Other processing steps, such as treating spatial data voids, differences in survey periods, or radar penetration, can still be important for individual cases. Future research should focus on testing different implementations of individual processing steps (e.g. co-registration) and addressing issues related to temporal corrections, radar penetration, glacier area changes, and density conversion. Finally, there is a clear need for our community to develop best practices, use open, reproducible software, and assess overall uncertainty in order to enhance inter-comparison and empower physical process insights across glacier elevation-change studies. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

14. Evolution of surface characteristics of three debris-covered glaciers in the Patagonian Andes from 1958 to 2020

Author

Falaschi, Daniel, Rivera, Andrés, Lo Vecchio Repetto, Andrés, Moragues, Silvana, Villalba, Ricardo, Rastner, Philipp, Zeller, Josias, Salcedo, Ana Paula, Falaschi, Daniel, Rivera, Andrés, Lo Vecchio Repetto, Andrés, Moragues, Silvana, Villalba, Ricardo, Rastner, Philipp, Zeller, Josias, and Salcedo, Ana Paula

Abstract

A number of glaciological observations on debris-covered glaciers around the globe have shown a delayed length and mass adjustment in relation to climate variability, a behavior normally attributed to the ice insulation effect of thick debris layers. Dynamic interactions between debris cover, geometry and surface topography of debris-covered glaciers can nevertheless govern glacier velocities and mass changes over time, with many glaciers exhibiting high thinning rates in spite of thick debris cover. Such interactions are progressively being incorporated into glacier evolution research. In this paper we reconstruct changes in debris-covered area, surface velocities and surface features of three glaciers in the Patagonian Andes over the 1958–2020 period, based on satellite and aerial imagery and Digital Elevation Models. Our results show that debris cover has increased from 40 ± 0.6 to 50 ± 6.7% of the total glacier area since 1958, whilst glacier slope has slightly decreased. The gently sloping tongues have allowed surface flow velocities to remain relatively low (<60 m a−1) for the last two decades, preventing evacuation of surface debris, and contributing to the formation and rise of the ice cliff zone upper boundary. In addition, mapping of end of summer snowline altitudes for the last two decades suggests an increase in the Equilibrium Line Altitudes, which promotes earlier melt out of englacial debris and further increases debris-covered ice area. The strongly negative mass budget of the three investigated glaciers throughout the study period, together with the increases in debris cover extent and ice cliff zones up-glacier, and the low velocities, shows a strong linkage between debris cover, mass balance evolution, surface velocities and topography. Interestingly, the presence of thicker debris layers on the lowermost portions of the glaciers has not lowered thinning rates in these ice areas, indicating that the mass budget is mainly driven by climate variabil

Published
2021

15. Sudden large-volume detachments of low-angle mountain glaciers – more frequent than thought?

Author

Kääb, Andreas, Jacquemart, Mylène; https://orcid.org/0000-0003-2501-7645, Gilbert, Adrien, Leinss, Silvan; https://orcid.org/0000-0002-4467-5793, Girod, Luc; https://orcid.org/0000-0003-3627-5885, Huggel, Christian, Falaschi, Daniel, Ugalde, Felipe; https://orcid.org/0000-0003-2994-7065, Petrakov, Dmitry, Chernomorets, Sergey; https://orcid.org/0000-0003-1798-8724, Dokukin, Mikhail; https://orcid.org/0000-0001-9603-195X, Paul, Frank, Gascoin, Simon; https://orcid.org/0000-0002-4996-6768, Berthier, Etienne; https://orcid.org/0000-0001-5978-9155, Kargel, Jeffrey S, Kääb, Andreas, Jacquemart, Mylène; https://orcid.org/0000-0003-2501-7645, Gilbert, Adrien, Leinss, Silvan; https://orcid.org/0000-0002-4467-5793, Girod, Luc; https://orcid.org/0000-0003-3627-5885, Huggel, Christian, Falaschi, Daniel, Ugalde, Felipe; https://orcid.org/0000-0003-2994-7065, Petrakov, Dmitry, Chernomorets, Sergey; https://orcid.org/0000-0003-1798-8724, Dokukin, Mikhail; https://orcid.org/0000-0001-9603-195X, Paul, Frank, Gascoin, Simon; https://orcid.org/0000-0002-4996-6768, Berthier, Etienne; https://orcid.org/0000-0001-5978-9155, and Kargel, Jeffrey S

Abstract

The detachment of large parts of low-angle mountain glaciers resulting in massive ice–rock avalanches have so far been believed to be a unique type of event, made known to the global scientific community first for the 2002 Kolka Glacier detachment, Caucasus Mountains, and then for the 2016 collapses of two glaciers in the Aru range, Tibet. Since 2016, several so-far unrecognized low-angle glacier detachments have been recognized and described, and new ones have occurred. In the current contribution, we compile, compare, and discuss 20 actual or suspected large-volume detachments of low-angle mountain glaciers at 10 different sites in the Caucasus, the Pamirs, Tibet, Altai, the North American Cordillera, and the Southern Andes. Many of the detachments reached volumes in the order of 10–100 million m3. The similarities and differences between the presented cases indicate that glacier detachments often involve a coincidental combination of factors related to the lowering of basal friction, high or increasing driving stresses, concentration of shear stress, or low resistance to exceed stability thresholds. Particularly soft glacier beds seem to be a common condition among the observed events as they offer smooth contact areas between the glacier and the underlying substrate and are prone to till-strength weakening and eventually basal failure under high pore-water pressure. Partially or fully thawed glacier bed conditions and the presence of liquid water could thus play an important role in the detachments. Surface slopes of the detached glaciers range between around 10∘ and 20∘. This may be low enough to enable the development of thick and thus large-volume glaciers while also being steep enough to allow critical driving stresses to build up. We construct a simple slab model to estimate ranges of glacier slope and width above which a glacier may be able to detach when extensively losing basal resistance. From this model we estimate that all the detachments described in

Published
2021

16. Validation of digital elevation models in the Central Andes of Chile

Author

Soza, Diego A. and Falaschi, Daniel

Subjects
purl.org/becyt/ford/1 [https], purl.org/becyt/ford/1.5 [https], GNSS, CENTRAL ANDES, DEM, VERTICAL ACCURACY, ICESAT-2 MISSION
Abstract

Este estudio validó la precisión y exactitud vertical de siete modelos de elevación digital DEM (SRTM X-SAR, SRTMv3 void filled 1 arcsec, SRTMv3 void filled 3 arcsec, SRTM GL1 Ellip, Aster GlobalDEM v3 2019/08. Alos World 3D 30m v21 2018/04, TamDEMx), a escalas regional y local en zonas de media y alta montaña de los Andes centrales de Chile. La precisión fue determinada utilizando pruebas estadísticas compiladas por el Instituto Nacional de Normalización (INN), las que consideraron datos de elevación de 149 puntos de control terrestre con mediciones GNSS y 1825 PCT de la misión IceSat-2. A escala regional, los resultados del error entre el valor observado y el valor estimado, indican que el DEM SRTM X-SAR es el de mayor exactitud y precisión vertical (exactitud= 21,3 m equivalente al 85%; RMSEz=21,7 m equivalente al 86,8% de precisión). Sin embargo, su configuración en bandas cruzadas no permite cálculos que aseguren la completitud de un área mayor a 2.500 km2 . Entonces, la siguiente opción es el DEM Alos World 3D 30m v21 2018/04 con exactitud de 22,5 m equivalente al 90%; RMSEz=23 m equivalente al 92%). A escala local y, considerando primero toda el área y todos los datos IceSat-2 y luego solo aquellas mediciones en zonas estables, el DEM Alos World 3d es el de mayor precisión y exactitud vertical, seguido del DEM AsterGDEMv3 19/08. En último lugar se ubica el DEM TamDEMx. This study validated the vertical exactitude and accuracy of seven digital elevation models DEM (SRTM X-SAR, SRTMv3 void voided 1 arcsec, SRTMv3 void filled 3 arcsec, SRTM GL1 Ellip, Aster GlobalDEM v3 2019/08. Alos World 3D 30m v21 2018/04, TamDEMx), considering both regional and local scale in middle/ higher mountain areas of the central Andes of Chile. Exactitude and Accuracy were determined using metrics and/or statistical tests reviewed by the National Institute of Standardization (INN), tests that considered the elevation data of 149 ground control acquired through several GNSS surveys, and 1825 gcp provided by IceSat-2 mission records. At the regional scale, the results of the error estimation between the observed and the predicted value indicate that the DEM SRTM X-SAR is the most precise and vertically accurate set (21,3 m of exactness equivalent to 85% of exactitude; RMSEz = 21,7 m of precision equivalent to 86.8% of accurate). However, the band layout does not allow calculations that ensure the completeness of an area greater than 2500 sqkm. Then, the next option is the DEM Alos World 3D 30m v21 2018/04 (22,5 m of exactness representing 90% of exactitude; RMSEz = 23 m equivalent to 92% of accurate). Locally, and first considering the entire area and all IceSat-2 data, and then only those measurements in stable zones, in both cases the Alos World 3d is the most exactly and vertically accurately DEM, followed by the DEM AsterGDEMv3 19/08. The poorest indicators belong to the DEM TamDEMx. Fil: Soza, Diego A.. No especifíca; Fil: Falaschi, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina

Published
2020

18. Sudden large-volume detachments of low-angle mountain glaciers – more frequent than thought?

Author

Kääb, Andreas, primary, Jacquemart, Mylène, additional, Gilbert, Adrien, additional, Leinss, Silvan, additional, Girod, Luc, additional, Huggel, Christian, additional, Falaschi, Daniel, additional, Ugalde, Felipe, additional, Petrakov, Dmitry, additional, Chernomorets, Sergey, additional, Dokukin, Mikhail, additional, Paul, Frank, additional, Gascoin, Simon, additional, Berthier, Etienne, additional, and Kargel, Jeffrey S., additional

Published
2021
Full Text
View/download PDF

19. Supplementary material to &quot;Sudden large-volume detachments of low-angle mountain glaciers – more frequent than thought&quot;

Author

Kääb, Andreas, primary, Jacquemart, Myléne, additional, Gilbert, Adrien, additional, Leinss, Silvan, additional, Girod, Luc, additional, Huggel, Christian, additional, Falaschi, Daniel, additional, Ugalde, Felipe, additional, Petrakov, Dmitry, additional, Chernomorets, Sergey, additional, Dokukin, Mikhail, additional, Paul, Frank, additional, Gascoin, Simon, additional, Berthier, Etienne, additional, and Kargel, Jeff, additional

Published
2020
Full Text
View/download PDF

20. Sudden large-volume detachments of low-angle mountain glaciers – more frequent than thought

Author

Kääb, Andreas, primary, Jacquemart, Myléne, additional, Gilbert, Adrien, additional, Leinss, Silvan, additional, Girod, Luc, additional, Huggel, Christian, additional, Falaschi, Daniel, additional, Ugalde, Felipe, additional, Petrakov, Dmitry, additional, Chernomorets, Sergey, additional, Dokukin, Mikhail, additional, Paul, Frank, additional, Gascoin, Simon, additional, Berthier, Etienne, additional, and Kargel, Jeff, additional

Published
2020
Full Text
View/download PDF

23. Brief communication: Collapse of 4Mm3 of ice from a cirque glacier in the Central Andes of Argentina

Author

Falaschi, Daniel, Kääb, Andreas, Paul, Frank, Tadono, Takeo, Rivera, Juan Antonio, and Lenzano, Luis Eduardo

Subjects
purl.org/becyt/ford/1 [https], ARGENTINA, purl.org/becyt/ford/1.5 [https], Oceanografía, Hidrología, Recursos Hídricos, GLACIER, CENTRAL ANDES, Geología, ATUEL, COLLAPSE, CIENCIAS NATURALES Y EXACTAS, Ciencias de la Tierra y relacionadas con el Medio Ambiente
Abstract

Among glacier instabilities, collapses of large parts of low-angle glaciers are a striking, exceptional phenomenon. So far, merely the 2002 collapse of Kolka Glacier in the Caucasus Mountains and the 2016 twin detachments of the Aru glaciers in western Tibet have been well documented. Here we report on the previously unnoticed collapse of an unnamed cirque glacier in the Central Andes of Argentina in March 2007. Although of much smaller ice volume, this 4:2 ± 0:6 × 106 m3 collapse in the Andes is similar to the Caucasus and Tibet ones in that the resulting ice avalanche travelled a total distance of ∼ 2 km over a surprisingly low angle of reach (∼ 5°). Fil: Falaschi, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Kääb, Andreas. University Of Oslo. Faculty Of Mathematics And Natural Science. Departamento Geosciences; Noruega Fil: Paul, Frank. Universitat Zurich; Suiza Fil: Tadono, Takeo. Japan Aerospace Exploration Agency; Japón Fil: Rivera, Juan Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Lenzano, Luis Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina

Published
2019

24. Brief communication: Collapse of 4 Mm³ of ice from a cirque glacier in the Central Andes of Argentina

Author

Falaschi, Daniel; https://orcid.org/0000-0001-9232-2813, Kääb, Andreas; https://orcid.org/0000-0002-6017-6564, Paul, Frank, Tadono, Takeo, Rivera, Juan Antonio, Lenzano, Luis Eduardo, Falaschi, Daniel; https://orcid.org/0000-0001-9232-2813, Kääb, Andreas; https://orcid.org/0000-0002-6017-6564, Paul, Frank, Tadono, Takeo, Rivera, Juan Antonio, and Lenzano, Luis Eduardo

Abstract

Among glacier instabilities, collapses of large parts of low-angle glaciers are a striking, exceptional phenomenon. So far, merely the 2002 collapse of Kolka Glacier in the Caucasus Mountains and the 2016 twin detachments of the Aru glaciers in western Tibet have been well documented. Here we report on the previously unnoticed collapse of an unnamed cirque glacier in the Central Andes of Argentina in March 2007. Although of much smaller ice volume, this 4.2±0.6×106 m³ collapse in the Andes is similar to the Caucasus and Tibet ones in that the resulting ice avalanche travelled a total distance of ∼2 km over a surprisingly low angle of reach (∼5∘).

Published
2019

25. Brief communication: 4 Mm3 collapse of a cirque glacier in the Central Andes of Argentina

Author

Falaschi, Daniel, Kääb, Andreas, Paul, Frank, Tadono, Takeo, Rivera, Juan Antonio, and Lenzano, Luis Eduardo

Abstract

Among glacier instabilities, collapses of large parts of low-angle glaciers are a striking, exceptional phenomenon. So far, merely the 2002 collapse of Kolka Glacier in the Caucasus Mountains and the 2016 twin detachments of the Aru glaciers in western Tibet have been well documented. Here we report on the previously unnoticed collapse of an unnamed cirque glacier in the Central Andes of Argentina in March 2007. Although of much smaller ice volume, the 4.5 ± 1 × 106 m3 collapse of Leñas glacier in the Andes is similar to the Caucasus and Tibet ones in that the resulting ice avalanche travelled a total distance of ∼ 2 km over a surprisingly low angle of reach (∼ 5°).

Published
2018

26. Balance de masa geodésico 2000-2011 de los glaciares de la cuenca del río Atuel, Andes Centrales de Mendoza (Argentina)

Author

Falaschi, Daniel, Lenzano, María Gabriela, Tadono, Takeo, Vich, Alberto Ismael, and Lenzano, Luis Eduardo

Subjects
purl.org/becyt/ford/1 [https], purl.org/becyt/ford/1.5 [https], Andes Centrales de Argentina, Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente, Balance de masa geodésico, Río Atuel, Geofísica, CIENCIAS NATURALES Y EXACTAS, Ciencias de la Tierra y relacionadas con el Medio Ambiente
Abstract

A pesar de ser una de las cadenas montañosas más largas y con mayor cobertura glaciar del mundo, existen vastas áreas de la Cordillera de los Andes donde las tendencias de cambio glaciar son poco conocidas. El presente estudio provee la primera estimación de los cambios de elevación, masa y volumen para 198 glaciares (90.74 km2) de la cuenca del río Atuel en los Andes mendocinos de Argentina, para el período comprendido entre los años 2000-2011. Mediante el método del balance de masa geodésico (diferenciación de los MDEs SRTM y ALOS PRISM) se determinó, en término medio, un adelgazamiento de -0.24 ±0.31 m a-1, de los glaciares investigados. Esto equivale a un cambio de volumen de -0.022 ±0.028 km3 a-1 y una pérdida de masa de -0.20 ±027. m a.eq. a-1. Esta tendencia regional de adelgazamiento moderado es menor que la que resulta de los registros previos de balances de masa de los Andes Centrales y Andes Patagónicos Australes. Los mapas de cambio de elevación de la superficie glaciar permitieron además reconocer el colapso masivo del glaciar Portezuelo de Las Leñas., Although the Andes are one of the longest mountain ranges hosting large ice masses in the world, there are still vast areas of the cordillera where the trends in glacier changes are poorly known. The present study provides the first elevation, mass and volume change estimations for 198 glaciers (90.74 km2) in the río Atuel catchment in the Andes of Mendoza, Argentina, during the 2000-2011 period. By means of the geodetic mass balance method (differencing of the SRTM and ALOS PRISM) we estimated an overall elevation change of -0.24 ±0.31 m yr-1. This value equals an ice volume change of -0.022 ±0.028 km3 yr-1 and a mass loss of -0.20 ±0.26 m w.e. yr-1. This regional trend of slight glacier thinning is lower than previous mass balance records in the Central and Southern Patagonian Andes. The glacier surface elevation change maps allowed for the identification of the Portezuelo de Las Leñas massive collapse., Asociación Argentina de Geofísicos y Geodestas

Published
2018

27. Surface velocities of Upsala glacier, Southern Patagonian Andes, estimated using cross-correlation satellite imagery: 2013-2014 period

Author

Moragues,Silvana, Lenzano,M. Gabriela, Lo Vecchio,Andrés, Falaschi,Daniel, and Lenzano,Luis

Subjects
Surface velocities, COSI-Corr, Cross-correlation, Upsala glacier, ASTER
Abstract

In this study we present surface velocities estimation for the Upsala glacier catchment, South Patagonian Ice Field (SPI) during the summer season of years 2013 (January-March) and 2014 (March-April), including the Bertacchi, Cono, and Murallón tributaries using satellite images from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). The Cross-Correlation method was applied by COSI-Corr technique with sub-pixel accuracy. In general, it should be noted that the SPI glaciers, and Upsala glacier in particular, are fast-flowing ice bodies, which makes the technique works properly. Results of surface velocities estimation ranged from 0.22 to 2.93 md−1 for January-March 2013 and 0.12 to 5.8 md−1 for March-April 2014. In summary, COSI-Corr can achieved accurate and reliable results for glacier displacements and surface velocities estimation, also contributing in the better knowledge of the velocities change processes in time, taking into account Upsala is one of the most dynamic temperate glaciers of the SPI.

Published
2018

28. Velocidades superficiales del glaciar Upsala, Andes patagónicos sur, mediante el uso de correlación cruzada en imágenes satelitales: Periodo 2013-2014

Author

Moragues, Silvana Noelia, Lenzano, María Gabriela, Lo Vecchio Repetto, Andrés, Falaschi, Daniel, and Lenzano, Luis Eduardo

Subjects
purl.org/becyt/ford/1 [https], purl.org/becyt/ford/1.5 [https], Geografía Física, COSI-CORR, UPSALA GLACIER, CROSS-CORRELATION, SURFACE VELOCITIES, CIENCIAS NATURALES Y EXACTAS, Ciencias de la Tierra y relacionadas con el Medio Ambiente, ASTER
Abstract

En este estudio se presentan las estimaciones de velocidades superficiales de la cuenca del glaciar Upsala, Campo de Hielo Patagónico Sur (CHPS) durante la temporada de verano de los años 2013 (enero-marzo) y 2014 (marzo-abril), incluyendo los glaciares tributarios Bertacchi, Cono y Murallón utilizando imágenes satelitales ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer). El método de correlación cruzada se aplicó mediante la implementación de la técnica COSI-Corr, con una precisión a nivel de subpixel. Cabe destacar que los glaciares del CHPS, en general, y el glaciar Upsala, en particular, son cuerpos de hielo de flujo rápido, lo que hace que la técnica funcione correctamente. Los resultados de las velocidades superficiales oscilaron entre 0,22 a 2,93 md-1 para el periodo enero-marzo de 2013 y de 0,12 a 5,8 md-1 para el periodo marzo-abril de 2014. En resumen, COSI-Corr alcanzó resultados precisos y confiables para la estimación de desplazamientos y velocidades superficiales de los glaciares, contribuyendo al mejor conocimiento de los procesos de cambio de velocidades en el tiempo, teniendo en cuenta que Upsala es uno de los glaciares templados más dinámicos del CHPS. In this study we present surface velocities estimation for the Upsala glacier catchment, South Patagonian Ice Field (SPI) during the summer season of years 2013 (January-March) and 2014 (March-April), including the Bertacchi, Cono, and Murallón tributaries using satellite images from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). The Cross-Correlation method was applied by COSI-Corr technique with sub-pixel accuracy. In general, it should be noted that the SPI glaciers, and Upsala glacier in particular, are fast-flowing ice bodies, which makes the technique works properly. Results of surface velocities estimation ranged from 0.22 to 2.93 md-1 for January-March 2013 and 0.12 to 5.8 md-1 for March-April 2014. In summary, COSI-Corr can achieved accurate and reliable results for glacier displacements and surface velocities estimation, also contributing in the better knowledge of the velocities change processes in time, taking into account Upsala is one of the most dynamic temperate glaciers of the SPI. Fil: Moragues, Silvana Noelia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Lenzano, María Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Lo Vecchio Repetto, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Falaschi, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Lenzano, Luis Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina

Published
2018

33. Rock Glacier Inventory of the Valles Calchaquies Region (～ 25°S), Salta, Argentina, Derived from ALOS Data

Author

Falaschi, Daniel, Castro, Mariano, Masiokas, Mariano, Ahumada, AnaLia, and Tadono, Takeo

Subjects
rock glacier inventory, ALOS, Valles Calchaquies, Cordillera Oriental, Argentina
Abstract

Rock glaciers near the Andean mountains of central and northwestern Argentina provide an important supply ofwater for agriculture, but data on their number, size, geographic distribution and altitudinal range are poorly known.Here, we provide the first detailed rock glacier inventory of the Valles Calchaquies region of Salta, Argentina, basedon 2.5 m x 2.5 m resolution Advanced Land Observing Satellite PRISM (Panchromatic Remote-sensing Instrumentsfor Stereo Mapping) satellite images. Rock glacier outlines were manually digitised and a total of 488 were identified,which cover a total area of c. 59 km2. The lower limits of intact and fossil rock glaciers are at c. 4300 m asl and 4100m asl, respectively. Because rock glaciers are protected by law in Argentina, the inventory provides an importantbasis for political decision-making about water resources and for further periglacial and environmental studies in thisregion., 資料番号: PA1410037000

Published
2014

36. Mass changes of alpine glaciers at the eastern margin of the Northern and Southern Patagonian Icefields between 2000 and 2012

Author

Falaschi, Daniel, Bolch, Tobias, Rastner, Philipp, Lenzano, Maria Gabriela, Lenzano, Luis, Lo Vecchio, Andrés, Moragues, Silvana, Falaschi, Daniel, Bolch, Tobias, Rastner, Philipp, Lenzano, Maria Gabriela, Lenzano, Luis, Lo Vecchio, Andrés, and Moragues, Silvana

Abstract

Despite renewed efforts to better understand glacier change and recognize glacier change trends in the Andes, relatively large areas in the Andes of Argentina and Chile are still not investigated. In this study, we report on glacier elevation and mass changes in the outer region of the Northern and Southern Patagonian Icefields in the Southern Patagonian Andes. A newly-compiled Landsat ETM+ derived glacier inventory (consisting of 2253 glaciers and ~1314 ± 66 km2 of ice area) and differencing of the SRTM and SPOT5 DEMs were used to derive glacier-specific elevation changes over the 2000–12 period. The investigated glaciers showed a volume change of −0.71 ± 0.55 km3 a−1, yielding a surface lowering of 0.52 ± 0.35 m a−1 on average and an overall mass loss of 0.46 ± 0.37 m w.e. a−1. Highly variable individual glacier responses were observed and interestingly, they were less negative than previously reported for the neighboring Patagonian Icefields.

Published
2017

38. Rock Glaciers in the Patagonian Andes: An Inventory for the Monte San Lorenzo (Cerro Cochrane) Massif, 47 deg S

Author

Falaschi, Daniel, Tadono, Takeo, Masiokas, Mariano, 田殿, 武雄, Falaschi, Daniel, Tadono, Takeo, Masiokas, Mariano, and 田殿, 武雄

Abstract

Although rock glaciers in the Central and Desert Andes of Argentina and Chile have been previously studied in detail, much less attention has been paid to the occurrence of these permafrost forms in Patagonia. Recently, however, the establishment of the Argentinean Glacier Inventory program, which intends to inventory and monitor all ice masses along the Argentinean Andes, has started a large amount of new geocryological research. The project is designed to provide reliable and worldwide comparable results, supported by well established technical procedures and background information. Presented here is the first rock glacier inventory of the Monte San Lorenzo (Cerro Cochrane) region in the southern Patagonian Andes. A total of 130 intact (9.86 km2) and 47 fossil (1.45 km2) landforms were inventoried using two 2.5 m resolution ALOS Panchromatic Remote-sensing Instruments for Stereo Mapping images. Since the Argentinean federal initiative described above legally protects all rock glaciers in the country as water reserves, and due to the little scientific knowledge concerning rock glaciers in the vast majority of the Patagonian Andes, this inventory provides an important basis for political decision-making and opens further geocryological research avenues for the Patagonian region in general.

Published
2016

40. Rock Glacier Inventory of the Valles Calchaquies Region (～ 25°S), Salta, Argentina, Derived from ALOS Data

Author

Falaschi, Daniel, Castro, Mariano, Masiokas, Mariano, 田殿, 武雄, Ahumada, AnaLia, Tadono, Takeo, Falaschi, Daniel, Castro, Mariano, Masiokas, Mariano, 田殿, 武雄, Ahumada, AnaLia, and Tadono, Takeo

Abstract

Rock glaciers near the Andean mountains of central and northwestern Argentina provide an important supply ofwater for agriculture, but data on their number, size, geographic distribution and altitudinal range are poorly known.Here, we provide the first detailed rock glacier inventory of the Valles Calchaquies region of Salta, Argentina, basedon 2.5 m x 2.5 m resolution Advanced Land Observing Satellite PRISM (Panchromatic Remote-sensing Instrumentsfor Stereo Mapping) satellite images. Rock glacier outlines were manually digitised and a total of 488 were identified,which cover a total area of c. 59 km2. The lower limits of intact and fossil rock glaciers are at c. 4300 m asl and 4100m asl, respectively. Because rock glaciers are protected by law in Argentina, the inventory provides an importantbasis for political decision-making about water resources and for further periglacial and environmental studies in thisregion.

Published
2015

42. Sudden large-volume detachments of low-angle mountain glaciers – more frequent than thought?

Author

Kääb, Andreas, Jacquemart, Mylène, Gilbert, Adrien, Leinss, Silvan, Girod, Luc, Huggel, Christian, Falaschi, Daniel, Ugalde, Felipe, Petrakov, Dmitry, Chernomorets, Sergey, Dokukin, Mikhail, Paul, Frank, Gascoin, Simon, Berthier, Etienne, and Kargel, Jeffrey S.

Subjects
13. Climate action
Abstract

The detachment of large parts of low-angle mountain glaciers resulting in massive ice–rock avalanches have so far been believed to be a unique type of event, made known to the global scientific community first for the 2002 Kolka Glacier detachment, Caucasus Mountains, and then for the 2016 collapses of two glaciers in the Aru range, Tibet. Since 2016, several so-far unrecognized low-angle glacier detachments have been recognized and described, and new ones have occurred. In the current contribution, we compile, compare, and discuss 20 actual or suspected large-volume detachments of low-angle mountain glaciers at 10 different sites in the Caucasus, the Pamirs, Tibet, Altai, the North American Cordillera, and the Southern Andes. Many of the detachments reached volumes in the order of 10–100 million m3. The similarities and differences between the presented cases indicate that glacier detachments often involve a coincidental combination of factors related to the lowering of basal friction, high or increasing driving stresses, concentration of shear stress, or low resistance to exceed stability thresholds. Particularly soft glacier beds seem to be a common condition among the observed events as they offer smooth contact areas between the glacier and the underlying substrate and are prone to till-strength weakening and eventually basal failure under high pore-water pressure. Partially or fully thawed glacier bed conditions and the presence of liquid water could thus play an important role in the detachments. Surface slopes of the detached glaciers range between around 10∘ and 20∘. This may be low enough to enable the development of thick and thus large-volume glaciers while also being steep enough to allow critical driving stresses to build up. We construct a simple slab model to estimate ranges of glacier slope and width above which a glacier may be able to detach when extensively losing basal resistance. From this model we estimate that all the detachments described in this study occurred due to a basal shear stress reduction of more than 50 %. Most of the ice–rock avalanches resulting from the detachments in this study have a particularly low angle of reach, down to around 5∘, likely due to their high ice content and connected liquefaction potential, the availability of soft basal slurries, and large amounts of basal water, as well as the smooth topographic setting typical for glacial valleys. Low-angle glacier detachments combine elements and likely also physical processes of glacier surges and ice break-offs from steep glaciers. The surge-like temporal evolution ahead of several detachments and their geographic proximity to other surge-type glaciers indicate the glacier detachments investigated can be interpreted as endmembers of the continuum of surge-like glacier instabilities. Though rare, glacier detachments appear to be more frequent than commonly thought and disclose, despite local differences in conditions and precursory evolutions, the fundamental and critical potential of low-angle soft glacier beds to fail catastrophically., The Cryosphere, 15 (4), ISSN:1994-0416, ISSN:1994-0424

43. Mass changes of alpine glaciers at the eastern margin of the Northern and Southern Patagonian Icefields between 2000 and 2012

Author

Daniel Falaschi, Phillip Rastern, Luis Lenzano, Tobias Bolch, María Gabriela Lenzano, Andrés Lo Vecchio Repetto, Silvana Moragues, University of Zurich, Falaschi, Daniel, University of St Andrews. School of Geography & Sustainable Development, and University of St Andrews. Bell-Edwards Geographic Data Institute

Subjects
geography, geography.geographical_feature_category, 010504 meteorology & atmospheric sciences, Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente, 1904 Earth-Surface Processes, Glacier, 3rd-DAS, 010502 geochemistry & geophysics, 01 natural sciences, Ciencias de la Tierra y relacionadas con el Medio Ambiente, purl.org/becyt/ford/1 [https], purl.org/becyt/ford/1.5 [https], Glacier mass balance, 10122 Institute of Geography, glacier volume, sense organs, glacier mass balance, Physical geography, 910 Geography & travel, mountain glaciers, CIENCIAS NATURALES Y EXACTAS, Geology, 0105 earth and related environmental sciences, Earth-Surface Processes
Abstract

Despite renewed efforts to better understand glacier change and recognize glacier change trends in the Andes, relatively large areas in the Andes of Argentina and Chile are still not investigated. In this study, we report on glacier elevation and mass changes in the outer region of the Northern and Southern Patagonian Icefields in the Southern Patagonian Andes. A newly-compiled Landsat ETM+ derived glacier inventory (consisting of 2253 glaciers and ∼1314 ± 66 km2 of ice area) and differencing of the SRTM and SPOT5 DEMs were used to derive glacier-specific elevation changes over the 2000?12 period. The investigated glaciers showed a volume change of −0.71 ± 0.55 km3 a−1, yielding a surface lowering of 0.52 ± 0.35 m a−1 on average and an overall mass loss of 0.46 ± 0.37 m w.e. a−1. Highly variable individual glacier responses were observed and interestingly, they were less negative than previously reported for the neighboring Patagonian Icefields. Fil: Falaschi, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Bolch, Tobias. Universitat Zurich; Suiza Fil: Rastern, Phillip. Universitat Zurich; Suiza Fil: Lenzano, María Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Lenzano, Luis Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Lo Vecchio Repetto, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Moragues, Silvana Noelia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina

Published
2016

44. New evidence of glacier surges in the Central Andes of Argentina and Chile

Author

Daniel Falaschi, Tobias Bolch, Andrés Lo Vecchio, Luis Lenzano, Takeo Tadono, María Gabriela Lenzano, University of Zurich, and Falaschi, Daniel

Subjects
010504 meteorology & atmospheric sciences, Geography, Planning and Development, CENTRAL ANDES, Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente, 010502 geochemistry & geophysics, 01 natural sciences, Ciencias de la Tierra y relacionadas con el Medio Ambiente, Glacier mass balance, 3305 Geography, Planning and Development, Earth and Planetary Sciences (miscellaneous), 910 Geography & travel, GLACIER ELEVATION CHANGE, 0105 earth and related environmental sciences, Planning and Development, geography, geography.geographical_feature_category, Geography, 1901 Earth and Planetary Sciences (miscellaneous), 1900 General Earth and Planetary Sciences, Glacier, GLACIER SURFACE VELOCITY, 10122 Institute of Geography, SURGE-TYPE GLACIER, General Earth and Planetary Sciences, GLACIER MASS BALANCE, Physical geography, Geology, CIENCIAS NATURALES Y EXACTAS
Abstract

In contrast to the large surge-type glacier clusters widely known for several mountain ranges around the world, the presence of surging glaciers in the Andes has been historically seen as marginal. The improved availability of satellite imagery during the last years facilitates investigating of glaciers in more detail even in remote areas. The purpose of the study was therefore to revisit existing information about surge-type glaciers for the Central Andes of Argentina and Chile (32° 40′–34° 20′ S), to identify and characterize possible further surge-type glaciers, providing new insights into the mass balance and evolution of the velocity of selected glaciers during the surge phase. Based on the analysis of 1962–2015 satellite imagery, historical aerial images, differencing of digital elevation models and a literature survey, we identified 21 surge-type glaciers in the study area. Eleven surge events and six possible surge-type glaciers were identified and described for the first time. The estimation of annual elevation changes of these glaciers for the 2000–2011 period, which encompasses the latest surge events in the region, showed heterogeneous behavior with strongly negative to positive surface elevation change patterns (−1.1 to +1.0 m yr−1). Additionally, we calculated maximum surface velocities of 3±1.9 m d−1 and 3.1±1.1 m d−1 for two of the glaciers during the latest identifiable surge events of 1985–1987 and 2003–2007. Within this glacier cluster, highly variable advance rates (0.01–1 km yr−1) and dissimilar surface velocities at the surge peak (3–35 m d−1) were observed. In comparison with other clusters worldwide, surge-type glaciers in the Central Andes are on average smaller and show minor absolute advances. Generally low velocities and the heterogeneous duration of the surge cycles are common between them and glaciers in the Karakorum, a region with similar climatic characteristics and many known surge-type glaciers. As a definitive assertion concerning the underlying surge mechanism of surges in the Central Andes could not be drawn based on the remote sensing data, this opens more detailed research avenues for surge-type glaciers in the region. Fil: Falaschi, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Bolch, Tobias. Universitat Zurich; Suiza Fil: Lenzano, María Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Tadono, Takeo. Tsukuba University; Japón Fil: Lo Vecchio Repetto, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Lenzano, Luis Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina

Published
2018

Catalog

Books, media, physical & digital resources
See catalog results