Assessing the Contribution of Glacier Melt to Discharge in the Tropics: The Case of Study of the Antisana Glacier 12 in Ecuador
Tropical glaciers are excellent indicators of climate variability due to their fast response to temperature and precipitation variations. At same time, they supply freshwater to downstream populations. In this study, a hydro-glaciological model was adapted to analyze the influence of meteorological...
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Frontiers Media S.A.
2022-04-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.732635/full |
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| author | Luis Felipe Gualco Luis Maisincho Luis Maisincho Marcos Villacís Lenin Campozano Vincent Favier Jean-Carlos Ruiz-Hernández Jean-Carlos Ruiz-Hernández Jean-Carlos Ruiz-Hernández Thomas Condom |
| author_facet | Luis Felipe Gualco Luis Maisincho Luis Maisincho Marcos Villacís Lenin Campozano Vincent Favier Jean-Carlos Ruiz-Hernández Jean-Carlos Ruiz-Hernández Jean-Carlos Ruiz-Hernández Thomas Condom |
| author_sort | Luis Felipe Gualco |
| collection | DOAJ |
| description | Tropical glaciers are excellent indicators of climate variability due to their fast response to temperature and precipitation variations. At same time, they supply freshwater to downstream populations. In this study, a hydro-glaciological model was adapted to analyze the influence of meteorological forcing on melting and discharge variations at Glacier 12 of Antisana volcano (4,735–5,720 m above sea level (a.s.l.), 1.68 km2, 0°29′S; 78°9′W). Energy fluxes and melting were calculated using a distributed surface energy balance model using 20 altitude bands from glacier snout to the summit at 30-min resolution for 684 days between 2011 and 2013. The discharge was computed using linear reservoirs for snow, firn, ice, and moraine zones. Meteorological variables were recorded at 4,750 m.a.s.l. in the ablation area and distributed through the altitudinal range using geometrical corrections, and measured lapse rate. The annual specific mass balance (−0.61 m of water equivalent -m w.e. y−1-) and the ablation gradient (22.76 kg m−2 m−1) agree with the values estimated from direct measurements. Sequential validations allowed the simulated discharge to reproduce hourly and daily discharge variability at the outlet of the catchment. The latter confirmed discharge simulated (0.187 m3 s−1) overestimates the streamflow measured. Hence it did not reflect the net meltwater production due to possible losses through the complex geology of the site. The lack of seasonality in cloud cover and incident short-wave radiation force the reflected short-wave radiation via albedo to drive melting energy from January to June and October to December. Whereas the wind speed was the most influencing variable during the July-September season. Results provide new insights on the behaviour of glaciers in the inner tropics since cloudiness and precipitation occur throughout the year yielding a constant short-wave attenuation and continuous variation of snow layer thickness. |
| first_indexed | 2024-04-14T00:31:12Z |
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| id | doaj.art-a99c94ccb1194f1fb28d645821c6d2c9 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-14T00:31:12Z |
| publishDate | 2022-04-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Earth Science |
| spelling | doaj.art-a99c94ccb1194f1fb28d645821c6d2c92022-12-22T02:22:32ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-04-011010.3389/feart.2022.732635732635Assessing the Contribution of Glacier Melt to Discharge in the Tropics: The Case of Study of the Antisana Glacier 12 in EcuadorLuis Felipe Gualco0Luis Maisincho1Luis Maisincho2Marcos Villacís3Lenin Campozano4Vincent Favier5Jean-Carlos Ruiz-Hernández6Jean-Carlos Ruiz-Hernández7Jean-Carlos Ruiz-Hernández8Thomas Condom9Escuela Politécnica Nacional, Departamento de Ingeniería Civil y Ambiental & Centro de Investigación y Estudios en Ingeniería de los Recursos Hídricos, Quito, EcuadorEscuela Politécnica Nacional, Departamento de Ingeniería Civil y Ambiental & Centro de Investigación y Estudios en Ingeniería de los Recursos Hídricos, Quito, EcuadorInstituto Nacional de Meteorología e Hidrología (INAMHI), Quito, EcuadorEscuela Politécnica Nacional, Departamento de Ingeniería Civil y Ambiental & Centro de Investigación y Estudios en Ingeniería de los Recursos Hídricos, Quito, EcuadorEscuela Politécnica Nacional, Departamento de Ingeniería Civil y Ambiental & Centro de Investigación y Estudios en Ingeniería de los Recursos Hídricos, Quito, EcuadorUniversity of Grenoble Alpes, IRD, CNRS, Grenoble INP, IGE, Grenoble, FranceEscuela Politécnica Nacional, Departamento de Ingeniería Civil y Ambiental & Centro de Investigación y Estudios en Ingeniería de los Recursos Hídricos, Quito, EcuadorUniversity of Grenoble Alpes, IRD, CNRS, Grenoble INP, IGE, Grenoble, FranceSorbonne Université, UMR 7619 METIS, Paris, FranceUniversity of Grenoble Alpes, IRD, CNRS, Grenoble INP, IGE, Grenoble, FranceTropical glaciers are excellent indicators of climate variability due to their fast response to temperature and precipitation variations. At same time, they supply freshwater to downstream populations. In this study, a hydro-glaciological model was adapted to analyze the influence of meteorological forcing on melting and discharge variations at Glacier 12 of Antisana volcano (4,735–5,720 m above sea level (a.s.l.), 1.68 km2, 0°29′S; 78°9′W). Energy fluxes and melting were calculated using a distributed surface energy balance model using 20 altitude bands from glacier snout to the summit at 30-min resolution for 684 days between 2011 and 2013. The discharge was computed using linear reservoirs for snow, firn, ice, and moraine zones. Meteorological variables were recorded at 4,750 m.a.s.l. in the ablation area and distributed through the altitudinal range using geometrical corrections, and measured lapse rate. The annual specific mass balance (−0.61 m of water equivalent -m w.e. y−1-) and the ablation gradient (22.76 kg m−2 m−1) agree with the values estimated from direct measurements. Sequential validations allowed the simulated discharge to reproduce hourly and daily discharge variability at the outlet of the catchment. The latter confirmed discharge simulated (0.187 m3 s−1) overestimates the streamflow measured. Hence it did not reflect the net meltwater production due to possible losses through the complex geology of the site. The lack of seasonality in cloud cover and incident short-wave radiation force the reflected short-wave radiation via albedo to drive melting energy from January to June and October to December. Whereas the wind speed was the most influencing variable during the July-September season. Results provide new insights on the behaviour of glaciers in the inner tropics since cloudiness and precipitation occur throughout the year yielding a constant short-wave attenuation and continuous variation of snow layer thickness.https://www.frontiersin.org/articles/10.3389/feart.2022.732635/fulltropical glaciermeltingalbedoprecipitationenergy balanceshortwave radiation |
| spellingShingle | Luis Felipe Gualco Luis Maisincho Luis Maisincho Marcos Villacís Lenin Campozano Vincent Favier Jean-Carlos Ruiz-Hernández Jean-Carlos Ruiz-Hernández Jean-Carlos Ruiz-Hernández Thomas Condom Assessing the Contribution of Glacier Melt to Discharge in the Tropics: The Case of Study of the Antisana Glacier 12 in Ecuador Frontiers in Earth Science tropical glacier melting albedo precipitation energy balance shortwave radiation |
| title | Assessing the Contribution of Glacier Melt to Discharge in the Tropics: The Case of Study of the Antisana Glacier 12 in Ecuador |
| title_full | Assessing the Contribution of Glacier Melt to Discharge in the Tropics: The Case of Study of the Antisana Glacier 12 in Ecuador |
| title_fullStr | Assessing the Contribution of Glacier Melt to Discharge in the Tropics: The Case of Study of the Antisana Glacier 12 in Ecuador |
| title_full_unstemmed | Assessing the Contribution of Glacier Melt to Discharge in the Tropics: The Case of Study of the Antisana Glacier 12 in Ecuador |
| title_short | Assessing the Contribution of Glacier Melt to Discharge in the Tropics: The Case of Study of the Antisana Glacier 12 in Ecuador |
| title_sort | assessing the contribution of glacier melt to discharge in the tropics the case of study of the antisana glacier 12 in ecuador |
| topic | tropical glacier melting albedo precipitation energy balance shortwave radiation |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.732635/full |
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