Strong acceleration of glacier area loss in the Greater Caucasus between 2000 and 2020
An updated glacier inventory is important for understanding glacier behaviour given the accelerating glacier retreat observed around the world. Here, we present data from a new glacier inventory for two points in time (2000, 2020) covering the entire Greater Caucasus (Georgia, Russia, and Azerbaijan...
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Copernicus Publications
2022
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Online Access: | https://doi.org/10.5194/tc-16-489-2022 https://tc.copernicus.org/articles/16/489/2022/tc-16-489-2022.pdf https://doaj.org/article/087aa04986064d06a846887a0a7efdf9 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:087aa04986064d06a846887a0a7efdf9 2023-05-15T18:32:16+02:00 Strong acceleration of glacier area loss in the Greater Caucasus between 2000 and 2020 L. G. Tielidze G. A. Nosenko T. E. Khromova F. Paul 2022-02-01 https://doi.org/10.5194/tc-16-489-2022 https://tc.copernicus.org/articles/16/489/2022/tc-16-489-2022.pdf https://doaj.org/article/087aa04986064d06a846887a0a7efdf9 en eng Copernicus Publications doi:10.5194/tc-16-489-2022 1994-0416 1994-0424 https://tc.copernicus.org/articles/16/489/2022/tc-16-489-2022.pdf https://doaj.org/article/087aa04986064d06a846887a0a7efdf9 undefined The Cryosphere, Vol 16, Pp 489-504 (2022) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.5194/tc-16-489-2022 2023-01-22T19:05:48Z An updated glacier inventory is important for understanding glacier behaviour given the accelerating glacier retreat observed around the world. Here, we present data from a new glacier inventory for two points in time (2000, 2020) covering the entire Greater Caucasus (Georgia, Russia, and Azerbaijan). Satellite imagery (Landsat, Sentinel, SPOT) was used to conduct a remote-sensing survey of glacier change. The 30 m resolution Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM; 17 November 2011) was used to determine aspect, slope, and elevations, for all glaciers. Glacier margins were mapped manually and reveal that in 2000 the mountain range contained 2186 glaciers with a total glacier area of 1381.5 ± 58.2 km2. By 2020, the area had decreased to 1060.9 ± 33.6 km2 a reduction of 23.2 ± 3.8 % (320.6 ± 45.9 km2) or −1.16 % yr−1 over the last 20 years in the Greater Caucasus. Of the 2223 glaciers, 14 have an area > 10 km2, resulting in the 221.9 km2 or 20.9 % of total glacier area in 2020. The Bezengi Glacier with an area of 39.4 ± 0.9 km2 was the largest glacier mapped in the 2020 database. Glaciers between 1.0 and 5.0 km2 accounted for 478.1 km2 or 34.6 % in total area in 2000, while they accounted for 354.0 km2 or 33.4 % in total area in 2020. The rates of area shrinkage and mean elevation vary between the northern and southern and between the western, central, and eastern Greater Caucasus. Area shrinkage is significantly stronger in the eastern Greater Caucasus (−1.82 % yr−1), where most glaciers are very small. The observed increased summer temperatures and decreased winter precipitation along with increased Saharan dust deposition might be responsible for the predominantly negative mass balances of Djankuat and Garabashi glaciers with long-term measurements. Both glacier inventories are available from the Global Land Ice Measurements from Space (GLIMS) database and can be used for future studies. Article in Journal/Newspaper The Cryosphere Unknown New Glacier ENVELOPE(162.400,162.400,-77.033,-77.033) The Cryosphere 16 2 489 504 |
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Open Polar |
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language |
English |
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geo envir |
spellingShingle |
geo envir L. G. Tielidze G. A. Nosenko T. E. Khromova F. Paul Strong acceleration of glacier area loss in the Greater Caucasus between 2000 and 2020 |
topic_facet |
geo envir |
description |
An updated glacier inventory is important for understanding glacier behaviour given the accelerating glacier retreat observed around the world. Here, we present data from a new glacier inventory for two points in time (2000, 2020) covering the entire Greater Caucasus (Georgia, Russia, and Azerbaijan). Satellite imagery (Landsat, Sentinel, SPOT) was used to conduct a remote-sensing survey of glacier change. The 30 m resolution Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM; 17 November 2011) was used to determine aspect, slope, and elevations, for all glaciers. Glacier margins were mapped manually and reveal that in 2000 the mountain range contained 2186 glaciers with a total glacier area of 1381.5 ± 58.2 km2. By 2020, the area had decreased to 1060.9 ± 33.6 km2 a reduction of 23.2 ± 3.8 % (320.6 ± 45.9 km2) or −1.16 % yr−1 over the last 20 years in the Greater Caucasus. Of the 2223 glaciers, 14 have an area > 10 km2, resulting in the 221.9 km2 or 20.9 % of total glacier area in 2020. The Bezengi Glacier with an area of 39.4 ± 0.9 km2 was the largest glacier mapped in the 2020 database. Glaciers between 1.0 and 5.0 km2 accounted for 478.1 km2 or 34.6 % in total area in 2000, while they accounted for 354.0 km2 or 33.4 % in total area in 2020. The rates of area shrinkage and mean elevation vary between the northern and southern and between the western, central, and eastern Greater Caucasus. Area shrinkage is significantly stronger in the eastern Greater Caucasus (−1.82 % yr−1), where most glaciers are very small. The observed increased summer temperatures and decreased winter precipitation along with increased Saharan dust deposition might be responsible for the predominantly negative mass balances of Djankuat and Garabashi glaciers with long-term measurements. Both glacier inventories are available from the Global Land Ice Measurements from Space (GLIMS) database and can be used for future studies. |
format |
Article in Journal/Newspaper |
author |
L. G. Tielidze G. A. Nosenko T. E. Khromova F. Paul |
author_facet |
L. G. Tielidze G. A. Nosenko T. E. Khromova F. Paul |
author_sort |
L. G. Tielidze |
title |
Strong acceleration of glacier area loss in the Greater Caucasus between 2000 and 2020 |
title_short |
Strong acceleration of glacier area loss in the Greater Caucasus between 2000 and 2020 |
title_full |
Strong acceleration of glacier area loss in the Greater Caucasus between 2000 and 2020 |
title_fullStr |
Strong acceleration of glacier area loss in the Greater Caucasus between 2000 and 2020 |
title_full_unstemmed |
Strong acceleration of glacier area loss in the Greater Caucasus between 2000 and 2020 |
title_sort |
strong acceleration of glacier area loss in the greater caucasus between 2000 and 2020 |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-489-2022 https://tc.copernicus.org/articles/16/489/2022/tc-16-489-2022.pdf https://doaj.org/article/087aa04986064d06a846887a0a7efdf9 |
long_lat |
ENVELOPE(162.400,162.400,-77.033,-77.033) |
geographic |
New Glacier |
geographic_facet |
New Glacier |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 16, Pp 489-504 (2022) |
op_relation |
doi:10.5194/tc-16-489-2022 1994-0416 1994-0424 https://tc.copernicus.org/articles/16/489/2022/tc-16-489-2022.pdf https://doaj.org/article/087aa04986064d06a846887a0a7efdf9 |
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undefined |
op_doi |
https://doi.org/10.5194/tc-16-489-2022 |
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The Cryosphere |
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16 |
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489 |
op_container_end_page |
504 |
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