Hydrological response of Andean catchments to recent glacier mass loss
The impacts of the accelerated glacier retreat in recent decades on glacier runoff changes are still unknown in most Andean catchments, increasing uncertainties in estimating water availability. This particularly affects the outer tropics and Dry Andes, heavily impacted by prolonged droughts. Curren...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2024
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-18-2487-2024 https://noa.gwlb.de/receive/cop_mods_00073724 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071872/tc-18-2487-2024.pdf https://tc.copernicus.org/articles/18/2487/2024/tc-18-2487-2024.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00073724 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00073724 2024-06-23T07:57:10+00:00 Hydrological response of Andean catchments to recent glacier mass loss Caro, Alexis Condom, Thomas Rabatel, Antoine Champollion, Nicolas García, Nicolás Saavedra, Freddy 2024-05 electronic https://doi.org/10.5194/tc-18-2487-2024 https://noa.gwlb.de/receive/cop_mods_00073724 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071872/tc-18-2487-2024.pdf https://tc.copernicus.org/articles/18/2487/2024/tc-18-2487-2024.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-18-2487-2024 https://noa.gwlb.de/receive/cop_mods_00073724 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071872/tc-18-2487-2024.pdf https://tc.copernicus.org/articles/18/2487/2024/tc-18-2487-2024.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/tc-18-2487-2024 2024-05-27T23:38:26Z The impacts of the accelerated glacier retreat in recent decades on glacier runoff changes are still unknown in most Andean catchments, increasing uncertainties in estimating water availability. This particularly affects the outer tropics and Dry Andes, heavily impacted by prolonged droughts. Current global estimates overlook climatic and morphometric disparities, which significantly influence model parameters, among Andean glaciers. Meanwhile, local studies have used different approaches to estimate glacier runoff in a few catchments. Improving 21st-century glacier runoff projections relies on calibrating and validating models using corrected historical climate inputs and calibrated parameters across diverse glaciological zones. Here, we simulate glacier evolution and related runoff changes between the periods 2000–2009 and 2010–2019 across 786 Andean catchments (11 282 km2 of glacierized area, 11° N to 55° S) using the Open Global Glacier Model (OGGM). TerraClimate atmospheric variables were corrected using in situ data, getting a mean temperature bias by up to 2.1 °C and enhanced monthly precipitation. Glacier mass balance and volume were calibrated, where melt factor and the Glen A parameter exhibited significant alignment with varying environmental conditions. Simulation outcomes were validated against in situ data in three documented catchments (with a glacierized area > 8 %) and monitored glaciers. Our results at the Andes scale reveal an average reduction of 8.3 % in glacier volume and a decrease of 2.2 % in surface area between the periods 2000–2009 and 2010–2019. Comparing these two periods, glacier and climate variations have led to a 12 % increase in mean annual glacier melt (86.5 m3 s−1) and a decrease in rainfall on glaciers of −2 % (−7.6 m3 s−1) across the Andes, with both variables comprising the glacier runoff. We confirmed the utility of our corrected regional simulations of glacier runoff contribution at the catchment scale, where our estimations align with previous studies (e.g., Maipo 34° ... Article in Journal/Newspaper The Cryosphere Niedersächsisches Online-Archiv NOA Maipo ENVELOPE(-59.676,-59.676,-62.488,-62.488) The Cryosphere 18 5 2487 2507 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Caro, Alexis Condom, Thomas Rabatel, Antoine Champollion, Nicolas García, Nicolás Saavedra, Freddy Hydrological response of Andean catchments to recent glacier mass loss |
topic_facet |
article Verlagsveröffentlichung |
description |
The impacts of the accelerated glacier retreat in recent decades on glacier runoff changes are still unknown in most Andean catchments, increasing uncertainties in estimating water availability. This particularly affects the outer tropics and Dry Andes, heavily impacted by prolonged droughts. Current global estimates overlook climatic and morphometric disparities, which significantly influence model parameters, among Andean glaciers. Meanwhile, local studies have used different approaches to estimate glacier runoff in a few catchments. Improving 21st-century glacier runoff projections relies on calibrating and validating models using corrected historical climate inputs and calibrated parameters across diverse glaciological zones. Here, we simulate glacier evolution and related runoff changes between the periods 2000–2009 and 2010–2019 across 786 Andean catchments (11 282 km2 of glacierized area, 11° N to 55° S) using the Open Global Glacier Model (OGGM). TerraClimate atmospheric variables were corrected using in situ data, getting a mean temperature bias by up to 2.1 °C and enhanced monthly precipitation. Glacier mass balance and volume were calibrated, where melt factor and the Glen A parameter exhibited significant alignment with varying environmental conditions. Simulation outcomes were validated against in situ data in three documented catchments (with a glacierized area > 8 %) and monitored glaciers. Our results at the Andes scale reveal an average reduction of 8.3 % in glacier volume and a decrease of 2.2 % in surface area between the periods 2000–2009 and 2010–2019. Comparing these two periods, glacier and climate variations have led to a 12 % increase in mean annual glacier melt (86.5 m3 s−1) and a decrease in rainfall on glaciers of −2 % (−7.6 m3 s−1) across the Andes, with both variables comprising the glacier runoff. We confirmed the utility of our corrected regional simulations of glacier runoff contribution at the catchment scale, where our estimations align with previous studies (e.g., Maipo 34° ... |
format |
Article in Journal/Newspaper |
author |
Caro, Alexis Condom, Thomas Rabatel, Antoine Champollion, Nicolas García, Nicolás Saavedra, Freddy |
author_facet |
Caro, Alexis Condom, Thomas Rabatel, Antoine Champollion, Nicolas García, Nicolás Saavedra, Freddy |
author_sort |
Caro, Alexis |
title |
Hydrological response of Andean catchments to recent glacier mass loss |
title_short |
Hydrological response of Andean catchments to recent glacier mass loss |
title_full |
Hydrological response of Andean catchments to recent glacier mass loss |
title_fullStr |
Hydrological response of Andean catchments to recent glacier mass loss |
title_full_unstemmed |
Hydrological response of Andean catchments to recent glacier mass loss |
title_sort |
hydrological response of andean catchments to recent glacier mass loss |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/tc-18-2487-2024 https://noa.gwlb.de/receive/cop_mods_00073724 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071872/tc-18-2487-2024.pdf https://tc.copernicus.org/articles/18/2487/2024/tc-18-2487-2024.pdf |
long_lat |
ENVELOPE(-59.676,-59.676,-62.488,-62.488) |
geographic |
Maipo |
geographic_facet |
Maipo |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-18-2487-2024 https://noa.gwlb.de/receive/cop_mods_00073724 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071872/tc-18-2487-2024.pdf https://tc.copernicus.org/articles/18/2487/2024/tc-18-2487-2024.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-18-2487-2024 |
container_title |
The Cryosphere |
container_volume |
18 |
container_issue |
5 |
container_start_page |
2487 |
op_container_end_page |
2507 |
_version_ |
1802650667073929216 |