Change of Chalaati Glacier (Georgian Caucasus) since the Little Ice Age based on dendrochronological and Beryllium‑10 data
Glacier variations over the past centuries are still poorly documented on the southern slope of the Greater Caucasus. In this paper, the change of Chalaati Glacier in the Georgian Caucasus from its maximum extent during the Little Ice Age has been studied. For the first time in the history of glacio...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | Russian |
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Nauka
2020-08-01
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| Series: | Лëд и снег |
| Subjects: | |
| Online Access: | https://ice-snow.igras.ru/jour/article/view/823 |
| _version_ | 1826558289459019776 |
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| author | L. G. Tielidze O. N. Solomina V. Jomelli E. A. Dolgova I. S. Bushueva V. N. Mikhalenko R. Brauche Team ASTER |
| author_facet | L. G. Tielidze O. N. Solomina V. Jomelli E. A. Dolgova I. S. Bushueva V. N. Mikhalenko R. Brauche Team ASTER |
| author_sort | L. G. Tielidze |
| collection | DOAJ |
| description | Glacier variations over the past centuries are still poorly documented on the southern slope of the Greater Caucasus. In this paper, the change of Chalaati Glacier in the Georgian Caucasus from its maximum extent during the Little Ice Age has been studied. For the first time in the history of glaciological studies of the Georgian Caucasus, 10Be in situ Cosmic Ray Exposure (CRE) dating was applied. The age of moraines was determined by tree-ring analysis. Lichenometry was also used as a supplementary tool to determine the relative ages of glacial landforms. In addition, the large-scale topographical maps (1887, 1960) were used along with the satellite imagery – Corona, Landsat 5 TM, and Sentinel 2B. Repeated photographs were used to identify the glacier extent in the late XIX and early XX centuries. 10Be CRE ages from the oldest lateral moraine of the Chalaati Glacier suggest that the onset of the Little Ice Age occurred ~0.73±0.04 kyr ago (CE ~1250–1330), while the dendrochronology and lichenometry measurements show that the Chalaati Glacier reached its secondary maximum extent again about CE ~1810. From that time through 2018 the glacier area decreased from 14.9±1.5 km2 to 9.9±0.5 km2 (33.8±7.4% or ~0.16% yr−1), while its length retreated by ~2280 m. The retreat rate was uneven: it peaked between 1940 and 1971 (~22.9 m yr−1), while the rate was slowest in 1910– 1930 (~4.0 m yr−1). The terminus elevation rose from ~1620 m to ~1980 m above sea level in ~1810–2018. |
| first_indexed | 2024-04-10T02:28:26Z |
| format | Article |
| id | doaj.art-9d9d414926b346f68c26b9700c8e4a06 |
| institution | Directory Open Access Journal |
| issn | 2076-6734 2412-3765 |
| language | Russian |
| last_indexed | 2025-03-14T08:42:08Z |
| publishDate | 2020-08-01 |
| publisher | Nauka |
| record_format | Article |
| series | Лëд и снег |
| spelling | doaj.art-9d9d414926b346f68c26b9700c8e4a062025-03-02T12:52:28ZrusNaukaЛëд и снег2076-67342412-37652020-08-0160345347010.31857/S2076673420030052628Change of Chalaati Glacier (Georgian Caucasus) since the Little Ice Age based on dendrochronological and Beryllium‑10 dataL. G. Tielidze0O. N. Solomina1V. Jomelli2E. A. Dolgova3I. S. Bushueva4V. N. Mikhalenko5R. Brauche6Team ASTER7Vakhushti Bagrationi Institute of Geography, Ivane Javakhishvili Tbilisi State University; Antarctic Research Centre, Victoria University of Wellington; School of Geography, Environment and Earth Sciences, Victoria University of WellingtonInstitute of Geography, Russian Academy of Sciences; Higher School of EconomicCNRS, UMR 34 Aix-Marseille University, CNRS-IRD-Coll; 7CNRS, LGP, Sorbonne UniversityInstitute of Geography, Russian Academy of SciencesInstitute of Geography, Russian Academy of SciencesInstitute of Geography, Russian Academy of SciencesCNRS, UMR 34 Aix-Marseille University, CNRS-IRD-CollCNRS, UMR 34 Aix-Marseille University, CNRS-IRD-Coll; A comprehensive list of consortium members is given at the end of the paperGlacier variations over the past centuries are still poorly documented on the southern slope of the Greater Caucasus. In this paper, the change of Chalaati Glacier in the Georgian Caucasus from its maximum extent during the Little Ice Age has been studied. For the first time in the history of glaciological studies of the Georgian Caucasus, 10Be in situ Cosmic Ray Exposure (CRE) dating was applied. The age of moraines was determined by tree-ring analysis. Lichenometry was also used as a supplementary tool to determine the relative ages of glacial landforms. In addition, the large-scale topographical maps (1887, 1960) were used along with the satellite imagery – Corona, Landsat 5 TM, and Sentinel 2B. Repeated photographs were used to identify the glacier extent in the late XIX and early XX centuries. 10Be CRE ages from the oldest lateral moraine of the Chalaati Glacier suggest that the onset of the Little Ice Age occurred ~0.73±0.04 kyr ago (CE ~1250–1330), while the dendrochronology and lichenometry measurements show that the Chalaati Glacier reached its secondary maximum extent again about CE ~1810. From that time through 2018 the glacier area decreased from 14.9±1.5 km2 to 9.9±0.5 km2 (33.8±7.4% or ~0.16% yr−1), while its length retreated by ~2280 m. The retreat rate was uneven: it peaked between 1940 and 1971 (~22.9 m yr−1), while the rate was slowest in 1910– 1930 (~4.0 m yr−1). The terminus elevation rose from ~1620 m to ~1980 m above sea level in ~1810–2018.https://ice-snow.igras.ru/jour/article/view/823cosmic ray exposure datingdendrochronologyglacier variationgreater caucasuslittle ice age |
| spellingShingle | L. G. Tielidze O. N. Solomina V. Jomelli E. A. Dolgova I. S. Bushueva V. N. Mikhalenko R. Brauche Team ASTER Change of Chalaati Glacier (Georgian Caucasus) since the Little Ice Age based on dendrochronological and Beryllium‑10 data Лëд и снег cosmic ray exposure dating dendrochronology glacier variation greater caucasus little ice age |
| title | Change of Chalaati Glacier (Georgian Caucasus) since the Little Ice Age based on dendrochronological and Beryllium‑10 data |
| title_full | Change of Chalaati Glacier (Georgian Caucasus) since the Little Ice Age based on dendrochronological and Beryllium‑10 data |
| title_fullStr | Change of Chalaati Glacier (Georgian Caucasus) since the Little Ice Age based on dendrochronological and Beryllium‑10 data |
| title_full_unstemmed | Change of Chalaati Glacier (Georgian Caucasus) since the Little Ice Age based on dendrochronological and Beryllium‑10 data |
| title_short | Change of Chalaati Glacier (Georgian Caucasus) since the Little Ice Age based on dendrochronological and Beryllium‑10 data |
| title_sort | change of chalaati glacier georgian caucasus since the little ice age based on dendrochronological and beryllium 10 data |
| topic | cosmic ray exposure dating dendrochronology glacier variation greater caucasus little ice age |
| url | https://ice-snow.igras.ru/jour/article/view/823 |
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