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3. Supplement of The Aneto glacier’s (Central Pyrenees) evolution from 1981 to 2022: ice loss observed from historic aerial image photogrammetry and remote sensing techniques

Author

Vidaller, Ixeia [0000-0001-8136-7688], Alonso-González, Esteban [0000-0002-1883-3823], Rojas-Heredia, Francisco [0000-0002-6718-4065], Moreno Caballud, Ana [0000-0001-7357-584X], López-Moreno, Juan I. [0000-0002-7270-9313], Revuelto, Jesús [0000-0001-5483-0147], Vidaller, Ixeia [ixeia@ipe.csic.es], Vidaller, Ixeia, Izagirre, Eñaut, Rio, Luis Mariano del, Alonso-González, Esteban, Rojas-Heredia, Francisco, Serrano, Enrique, Moreno Caballud, Ana, López-Moreno, Juan I., Revuelto, Jesús, Vidaller, Ixeia [0000-0001-8136-7688], Alonso-González, Esteban [0000-0002-1883-3823], Rojas-Heredia, Francisco [0000-0002-6718-4065], Moreno Caballud, Ana [0000-0001-7357-584X], López-Moreno, Juan I. [0000-0002-7270-9313], Revuelto, Jesús [0000-0001-5483-0147], Vidaller, Ixeia [ixeia@ipe.csic.es], Vidaller, Ixeia, Izagirre, Eñaut, Rio, Luis Mariano del, Alonso-González, Esteban, Rojas-Heredia, Francisco, Serrano, Enrique, Moreno Caballud, Ana, López-Moreno, Juan I., and Revuelto, Jesús

Published
2023

4. Intermediate snowpack melt-out dates guarantee the highest seasonal grasslands greening in the Pyrenees [Dataset]

Author

Revuelto, Jesús [0000-0001-5483-0147], Gómez García, Daniel [0000-0002-9738-8720], Alonso-González, Esteban [0000-0002-1883-3823], Vidaller, Ixeia [0000-0001-8136-7688], Rojas-Heredia, Francisco [0000-0002-6718-4065], Deschamps-Berger, César [0000-0003-3017-5250], López-Moreno, Juan I. [0000-0002-7270-9313], Revuelto, Jesús [jrevuelto@ipe.csic.es], Revuelto, Jesús, Gómez García, Daniel, Alonso-González, Esteban, Vidaller, Ixeia, Rojas-Heredia, Francisco, Deschamps-Berger, César, García-Jiménez, J., Rodríguez-López, Guillermo, Sobrino, Javier, Montorio, Raquel, Pérez-Cabello, Fernando, López-Moreno, Juan I., Revuelto, Jesús [0000-0001-5483-0147], Gómez García, Daniel [0000-0002-9738-8720], Alonso-González, Esteban [0000-0002-1883-3823], Vidaller, Ixeia [0000-0001-8136-7688], Rojas-Heredia, Francisco [0000-0002-6718-4065], Deschamps-Berger, César [0000-0003-3017-5250], López-Moreno, Juan I. [0000-0002-7270-9313], Revuelto, Jesús [jrevuelto@ipe.csic.es], Revuelto, Jesús, Gómez García, Daniel, Alonso-González, Esteban, Vidaller, Ixeia, Rojas-Heredia, Francisco, Deschamps-Berger, César, García-Jiménez, J., Rodríguez-López, Guillermo, Sobrino, Javier, Montorio, Raquel, Pérez-Cabello, Fernando, and López-Moreno, Juan I.

Published
2022

5. UAV observations of the NDVI, snow depth and melt out date, retreived ar the Izas Experimental Catchment in 2020 and 2021

Author

Revuelto, Jesús [0000-0001-5483-0147], Gómez García, Daniel [0000-0002-9738-8720], Alonso-González, Esteban [0000-0002-1883-3823], Vidaller, Ixeia [0000-0001-8136-7688], Rojas-Heredia, Francisco [0000-0002-6718-4065], Deschamps-Berger, César [0000-0003-3017-5250], Revuelto, Jesús, Gómez García, Daniel, Alonso-González, Esteban, Vidaller, Ixeia, Rojas-Heredia, Francisco, Deschamps-Berger, César, García-Jiménez, J., Sobrino, Javier, Montorio, Raquel, Pérez-Cabello, Fernando, Revuelto, Jesús [0000-0001-5483-0147], Gómez García, Daniel [0000-0002-9738-8720], Alonso-González, Esteban [0000-0002-1883-3823], Vidaller, Ixeia [0000-0001-8136-7688], Rojas-Heredia, Francisco [0000-0002-6718-4065], Deschamps-Berger, César [0000-0003-3017-5250], Revuelto, Jesús, Gómez García, Daniel, Alonso-González, Esteban, Vidaller, Ixeia, Rojas-Heredia, Francisco, Deschamps-Berger, César, García-Jiménez, J., Sobrino, Javier, Montorio, Raquel, and Pérez-Cabello, Fernando

Abstract

This dataset includes very high spatial resolution observations at 1 m spatial resolution observations of the snow depth, the NDVI and the melt-out date (DOY of year) acquired with an Unmanned Aerial Vehicle at a sub-alpine site in the Pyrenees, the Izas Experimental Catchment. During two snow seasons (2019-2020 and 2020-2021), 14 NDVI and 17 snow depth distributions were acquired over 48ha. From the snow depth observations the melt-out dates have been derived. Also information on the main topographic variables (elevation, aspect and slope) is included, with same spatial resolution, in this dataset.

Published
2022

6. Recent evolution of glaciers in the Cocuy-Güican Mountains (Colombian Andes) and the hydrological implications

Author

Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), López-Moreno, Juan I. [0000-0002-7270-9313], Rojas-Heredia, Francisco [0000-0002-6718-4065], Morán-Tejeda, Enrique [0000-0001-5186-0893], Alonso-González, Esteban [0000-0002-1883-3823], Vidaller, Ixeia [0000-0001-8136-7688], Deschamps-Berger, César [0000-0003-3017-5250], Revuelto, Jesús [0000-0001-5483-0147], López-Moreno, Juan I., Rojas-Heredia, Francisco, Ceballos-Liévano, Jorge Luis, Morán-Tejeda, Enrique, Alonso-González, Esteban, Vidaller, Ixeia, Deschamps-Berger, César, Revuelto, Jesús, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), López-Moreno, Juan I. [0000-0002-7270-9313], Rojas-Heredia, Francisco [0000-0002-6718-4065], Morán-Tejeda, Enrique [0000-0001-5186-0893], Alonso-González, Esteban [0000-0002-1883-3823], Vidaller, Ixeia [0000-0001-8136-7688], Deschamps-Berger, César [0000-0003-3017-5250], Revuelto, Jesús [0000-0001-5483-0147], López-Moreno, Juan I., Rojas-Heredia, Francisco, Ceballos-Liévano, Jorge Luis, Morán-Tejeda, Enrique, Alonso-González, Esteban, Vidaller, Ixeia, Deschamps-Berger, César, and Revuelto, Jesús

Abstract

This study extends knowledge of the evolution of glacier shrinkage in the Cocuy-Güican Mountains since the maximum glacier extent of the Little Ice Age (LIA). Mass balance data for the Ritacuba Glacier since 2009 were acquired and compared with available data for the Conejeras Glacier (Los Nevados National Park). This study also investigated the hydrological significance of Colombian glaciers, which is still largely unknown because the available information is very limited. Glaciers in the Cocuy-Güican Mountains covered 13.2 km2 in 2019 compared with 127.8 km2 during the maximum LIA, representing a shrinkage of 89.7%. Analysis of glacier cover observations made in 1955, 1994, 2010, and 2019 revealed that the rate of ice loss was greatest from 1994 to 2010 (0.59 km2 yr−1), and was then almost halved from 2010 to 2019 (0.34 km2 yr−1). This slowing of glacier retreat is consistent with the moderate negative mass balance measured for 2009–2019, and an accumulated loss of 1766 mm w.e. (mm water equivalent). The progressive confinement of glaciers to higher elevations, ice accumulation in topographic locations providing shelter from solar radiation, and an absence of recent marked climatic anomalies could explain why the Cocuy-Güican glaciers have temporally reached a near equilibrium state conditions. This contrasts with the Conejeras Glacier, where 47,000 mm w.e. has been lost in the same period. The available data on runoff and isotope tracers of streamflow and precipitation suggest that precipitation rather than glacier melt water exerts primary control over the hydrological variability at high elevation sites.

Published
2022

7. Intermediate snowpack melt-out dates guarantee the highest seasonal grasslands greening in the Pyrenees

Author

Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Revuelto, Jesús [0000-0001-5483-0147], Gómez García, Daniel [0000-0002-9738-8720], Alonso-González, Esteban [0000-0002-1883-3823], Vidaller, Ixeia [0000-0001-8136-7688], Rojas-Heredia, Francisco [0000-0002-6718-4065], Deschamps-Berger, César [0000-0003-3017-5250], López-Moreno, Juan I. [0000-0002-7270-9313], Revuelto, Jesús, Gómez García, Daniel, Alonso-González, Esteban, Vidaller, Ixeia, Rojas-Heredia, Francisco, Deschamps-Berger, César, García-Jiménez, J., Rodríguez-López, Guillermo, Sobrino, J., Montorio, R., Pérez-Cabello, Fernando, López-Moreno, Juan I., Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Revuelto, Jesús [0000-0001-5483-0147], Gómez García, Daniel [0000-0002-9738-8720], Alonso-González, Esteban [0000-0002-1883-3823], Vidaller, Ixeia [0000-0001-8136-7688], Rojas-Heredia, Francisco [0000-0002-6718-4065], Deschamps-Berger, César [0000-0003-3017-5250], López-Moreno, Juan I. [0000-0002-7270-9313], Revuelto, Jesús, Gómez García, Daniel, Alonso-González, Esteban, Vidaller, Ixeia, Rojas-Heredia, Francisco, Deschamps-Berger, César, García-Jiménez, J., Rodríguez-López, Guillermo, Sobrino, J., Montorio, R., Pérez-Cabello, Fernando, and López-Moreno, Juan I.

Abstract

In mountain areas, the phenology and productivity of grassland are closely related to snow dynamics. However, the influence that snow melt timing has on grassland growing still needs further attention for a full understanding, particularly at high spatial resolution. Aiming to reduce this knowledge gap, this work exploits 1 m resolution snow depth and Normalized Difference Vegetation Index observations acquired with an Unmanned Aerial Vehicle at a sub-alpine site in the Pyrenees. During two snow seasons (2019–2020 and 2020–2021), 14 NDVI and 17 snow depth distributions were acquired over 48 ha. Despite the snow dynamics being different in the two seasons, the response of grasslands greening to snow melt-out exhibited a very similar pattern in both. The NDVI temporal evolution in areas with distinct melt-out dates reveals that sectors where the melt-out date occurs in late April or early May (optimum melt-out) reach the maximum vegetation productivity. Zones with an earlier or a later melt-out rarely reach peak NDVI values. The results obtained in this study area, suggest that knowledge about snow depth distribution is not needed to understand NDVI grassland dynamics. The analysis did not reveal a clear link between the spatial variability in snow duration and the diversity and richness of grassland communities within the study area.

Published
2022

8. Reconstructed Aneto glacier surfaces from historic aerial image photogrammetry (1981) and remote sensing techniques (2020, 2021, 2022) [dataset]

Author

Vidaller, Ixeia [0000-0001-8136-7688], Alonso-González, Esteban [0000-0002-1883-3823], Rojas-Heredia, Francisco [0000-0002-6718-4065], Moreno Caballud, Ana [0000-0001-7357-584X], López-Moreno, Juan I. [0000-0002-7270-9313], Revuelto, Jesús [0000-0001-5483-0147], Vidaller, Ixeia, Izagirre, Eñaut, Rio, Luis Mariano del, Alonso-González, Esteban, Rojas-Heredia, Francisco, Serrano, Enrique, Moreno Caballud, Ana, López-Moreno, Juan I., Revuelto, Jesús, Vidaller, Ixeia [0000-0001-8136-7688], Alonso-González, Esteban [0000-0002-1883-3823], Rojas-Heredia, Francisco [0000-0002-6718-4065], Moreno Caballud, Ana [0000-0001-7357-584X], López-Moreno, Juan I. [0000-0002-7270-9313], Revuelto, Jesús [0000-0001-5483-0147], Vidaller, Ixeia, Izagirre, Eñaut, Rio, Luis Mariano del, Alonso-González, Esteban, Rojas-Heredia, Francisco, Serrano, Enrique, Moreno Caballud, Ana, López-Moreno, Juan I., and Revuelto, Jesús

Abstract

The Aneto Glacier, is the largest glacier in the Pyrenees. Its shrinkage and wastage have been continuous in recent decades, and there are signs of accelerated melting in recent years. In this study, changes in the surface and ice thickness of the Aneto Glacier from 1981 to 2022 are investigated using historical aerial imagery, airborne LiDAR point clouds, and UAV imagery. A GPR survey conducted in 2020, combined with data from photogrammetric analyses, allowed us to reconstruct the current ice thickness and also the existing ice distribution in 1981 and 2011. Over the last 41 years, the total glaciated area has shrunk by 64.7% and the ice thickness has decreased, on average, by 30.5 m. The mean remaining ice thickness in autumn 2022 was 11.9 m, as against the mean thicknesses of 32.9 m, 19.2 m reconstructed for 1981 and 2011 and 15.0 m observed in 2020 respectively. The results demonstrate the critical situation of the glacier, with an imminent segmentation into two smaller ice bodies and no evidence of an accumulation zone. We also found that the occurrence of an extremely hot and dry year, as observed in the 2021–2022 season, leads to a drastic degradation of the glacier, posing a high risk to the persistence of the Aneto Glacier, a situation that could extend to the rest of the Pyrenean glaciers in a relatively short time.

Published
2022

9. The Aneto Glacier (Central Pyrenees) evolution from 1981 to 2022: ice loss observed from historic aerial image photogrammetry and recent remote sensing techniques

Author

Vidaller, Ixeia, primary, Izagirre, Eñaut, additional, del Rio, Luis Mariano, additional, Alonso-González, Esteban, additional, Rojas-Heredia, Francisco, additional, Serrano, Enrique, additional, Moreno, Ana, additional, López-Moreno, Juan Ignacio, additional, and Revuelto, Jesús, additional

Published
2023
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10. Supplementary material to "The Aneto Glacier (Central Pyrenees) evolution from 1981 to 2022: ice loss observed from historic aerial image photogrammetry and recent remote sensing techniques"

Author

Vidaller, Ixeia, primary, Izagirre, Eñaut, additional, del Rio, Luis Mariano, additional, Alonso-González, Esteban, additional, Rojas-Heredia, Francisco, additional, Serrano, Enrique, additional, Moreno, Ana, additional, López-Moreno, Juan Ignacio, additional, and Revuelto, Jesús, additional

Published
2023
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11. The Aneto glacier's (Central Pyrenees) evolution from 1981 to 2022: ice loss observed from historic aerial image photogrammetry and remote sensing techniques

Author

Ministerio de Economía y Competitividad (España), Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Ciencia e Innovación (España), Universidad de Zaragoza, Universidad del País Vasco, Eusko Jaurlaritza, Centre National D'Etudes Spatiales (France), CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI), Alonso-González, Esteban [0000-0002-1883-3823], Moreno Caballud, Ana [0000-0001-7357-584X], López-Moreno, Juan I. [0000-0002-7270-9313], Revuelto, Jesús [0000-0001-5483-0147], Vidaller, Ixeia, Izagirre, Eñaut, Rio, Luis Mariano del, Alonso-González, Esteban, Rojas-Heredia, Francisco, Serrano, Enrique, Moreno Caballud, Ana, López-Moreno, Juan I., Revuelto, Jesús, Ministerio de Economía y Competitividad (España), Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Ministerio de Ciencia e Innovación (España), Universidad de Zaragoza, Universidad del País Vasco, Eusko Jaurlaritza, Centre National D'Etudes Spatiales (France), CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI), Alonso-González, Esteban [0000-0002-1883-3823], Moreno Caballud, Ana [0000-0001-7357-584X], López-Moreno, Juan I. [0000-0002-7270-9313], Revuelto, Jesús [0000-0001-5483-0147], Vidaller, Ixeia, Izagirre, Eñaut, Rio, Luis Mariano del, Alonso-González, Esteban, Rojas-Heredia, Francisco, Serrano, Enrique, Moreno Caballud, Ana, López-Moreno, Juan I., and Revuelto, Jesús

Abstract

The Aneto glacier, although it may be considered a very small glacier (<0.5 km2), is the largest glacier in the Pyrenees. Its surface and thickness loss have been continuous in recent decades, and there have been signs of accelerated melting in recent years. In this study, thickness and surface losses of the Aneto glacier from 1981 to 2022 are investigated using historical aerial imagery, airborne lidar point clouds and unoccupied aerial vehicle (UAV) imagery. A ground-penetrating radar (GPR) survey conducted in 2020, combined with data from photogrammetric analyses, allowed us to reconstruct the current ice thickness and also the existing ice distribution in 1981 and 2011. Over the last 41 years, the total glacierised area has decreased by 64.7 %, and the ice thickness has decreased, on average, by 30.5 m. The mean remaining ice thickness in autumn 2022 was 11.9 m, as against the mean thickness of 32.9, 19.2 and 15.0 m reconstructed for 1981 and 2011 and observed in 2020, respectively. The results demonstrate the critical situation of the glacier, with an imminent segmentation into two smaller ice bodies and no evidence of an accumulation zone. We also found that the occurrence of an extremely hot and dry year, as observed in the 2021–2022 season, leads to a drastic degradation of the glacier, posing a high risk to the persistence of the Aneto glacier, a situation that could extend to the rest of the Pyrenean glaciers in a relatively short time.

Published
2023

12. The Aneto glacier's (Central Pyrenees) evolution from 1981 to 2022: ice loss observed from historic aerial image photogrammetry and remote sensing techniques.

Author

Vidaller, Ixeia, Izagirre, Eñaut, del Rio, Luis Mariano, Alonso-González, Esteban, Rojas-Heredia, Francisco, Serrano, Enrique, Moreno, Ana, López-Moreno, Juan Ignacio, and Revuelto, Jesús

Subjects
*GLACIERS, *AERIAL photogrammetry, *REMOTE sensing, *AIRBORNE-based remote sensing, *DIGITAL photogrammetry, *ICE, *GROUND penetrating radar, *AUTUMN
Abstract

The Aneto glacier, although it may be considered a very small glacier (<0.5 km 2), is the largest glacier in the Pyrenees. Its surface and thickness loss have been continuous in recent decades, and there have been signs of accelerated melting in recent years. In this study, thickness and surface losses of the Aneto glacier from 1981 to 2022 are investigated using historical aerial imagery, airborne lidar point clouds and unoccupied aerial vehicle (UAV) imagery. A ground-penetrating radar (GPR) survey conducted in 2020, combined with data from photogrammetric analyses, allowed us to reconstruct the current ice thickness and also the existing ice distribution in 1981 and 2011. Over the last 41 years, the total glacierised area has decreased by 64.7 %, and the ice thickness has decreased, on average, by 30.5 m. The mean remaining ice thickness in autumn 2022 was 11.9 m, as against the mean thickness of 32.9, 19.2 and 15.0 m reconstructed for 1981 and 2011 and observed in 2020, respectively. The results demonstrate the critical situation of the glacier, with an imminent segmentation into two smaller ice bodies and no evidence of an accumulation zone. We also found that the occurrence of an extremely hot and dry year, as observed in the 2021–2022 season, leads to a drastic degradation of the glacier, posing a high risk to the persistence of the Aneto glacier, a situation that could extend to the rest of the Pyrenean glaciers in a relatively short time. [ABSTRACT FROM AUTHOR]

Published
2023
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14. The Aneto Glacier (Central Pyrenees) evolution from 1981 to 2022: ice loss observed from historic aerial image photogrammetry and recent remote sensing techniques.

Author

Vidaller, Ixeia, Izagirre, Eñaut, Mariano del Rio, Luis, Alonso-González, Esteban, Rojas-Heredia, Francisco, Serrano, Enrique, Moreno, Ana, Ignacio López-Moreno, Juan, and Revuelto, Jesús

Abstract

The Aneto Glacier, although it may be considered very small (<0.5 km2), is the largest glacier in the Pyrenees. Its shrinkage and wastage have been continuous in recent decades, and there are signs of accelerated melting in recent years. In this study, changes in the area and volume of the Aneto Glacier from 1981 to 2022 are investigated using historical aerial imagery, airborne LiDAR point clouds, and UAV imagery. A GPR survey conducted in 2020, combined with data from photogrammetric analyses, allowed us to reconstruct the current ice thickness and also the existing ice distribution in 1981 and 2011. Over the last 41 years, the total glaciated area has shrunk by 64.7% and the ice thickness has decreased, on average, by 30.5 m. The mean remaining ice thickness in autumn 2022 was 11.9 m, as against the mean thicknesses of 32.9 m, 19.2 m and 15.0 m reconstructed for 1981 and 2011 and observed in 2020 respectively. The results demonstrate the critical situation of the glacier, with an imminent segmentation into two smaller ice bodies and no evidence of an accumulation zone. We also found that the occurrence of an extremely hot and dry year, as observed in the 2021-2022 season, leads to a drastic degradation of the glacier, posing a high risk to the persistence of the Aneto Glacier, a situation that could extend to the rest of the Pyrenean glaciers in a relatively short time. [ABSTRACT FROM AUTHOR]

Published
2023
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17. Nuevos datos sobre la Pequeña Edad de Hielo en el macizo de Eriste (Pirineos centrales)

Author

Vidaller, Ixeia, Belmonte, Ánchel, and Guerrero, Jesús

Abstract

El macizo de Eriste se localiza en los Pirineos; entre los picos Lardana (3.369 m) y Cotiella (2.912 m). Su paisaje está condicionado por la litología y el desarrollo de procesos periglaciares. Durante la Pequeña Edad de Hielo (PEH), este macizo tuvo 3 glaciares con orientación N, 6 con orientación S, 3 con orientación W y 4 con orientación E. La mayor agrupación de morrenas de esta época se concentra en el circo de Bagüeña. Se han detectado dos fases glaciares asociadas con la máxima expansión glaciar de la PEH (1600-1750) y otra posterior y de menor extensión entre 1905 y 1920. El presente estudio pretende realizar una reconstrucción paleoambiental desde la PEH hasta la actualidad en base a los cambios de las paleoELAs. Los resultados de las paleoELAs (obtenidos para un gradiente altitudinal de temperatura de -0,6ºC/100m y una ELA actual de 3.100 m presentan una media de 2.685 m, lo que sugiere un incremento de temperatura de unos 2,5ºC desde el máximo de la PEH hasta la actualidad.

Published
2020

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