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...
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2020
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| Online Access: | https://ice-snow.igras.ru/jour/article/view/823 https://doi.org/10.31857/S2076673420030052 |
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ftjias:oai:oai.ice.elpub.ru:article/823 |
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Ice and Snow (E-Journal) |
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English |
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Cosmic Ray Exposure dating;dendrochronology;glacier variation;Greater Caucasus;Little Ice Age Большой Кавказ;дендрохронология;колебания ледников;космогенные датировки;малый ледниковый период |
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Cosmic Ray Exposure dating;dendrochronology;glacier variation;Greater Caucasus;Little Ice Age Большой Кавказ;дендрохронология;колебания ледников;космогенные датировки;малый ледниковый период L. Tielidze G. O. Solomina N. V. Jomelli E. Dolgova A. I. Bushueva S. V. Mikhalenko N. R. Brauche Team ASTER Л. Тиелидзе Г. О. Соломина Н. В. Джомелли Е. Долгова А. И. Бушуева С. В. Михаленко Н. Р. Брошэ Команда АСТЕР Change of Chalaati Glacier (Georgian Caucasus) since the Little Ice Age based on dendrochronological and Beryllium‑10 data |
| topic_facet |
Cosmic Ray Exposure dating;dendrochronology;glacier variation;Greater Caucasus;Little Ice Age Большой Кавказ;дендрохронология;колебания ледников;космогенные датировки;малый ледниковый период |
| 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. Для реконструкции колебаний ледника Чалаати в Грузии использовались космические снимки, старые карты, повторные фотографии, дендрохронология, лихенометрия и анализ космогенных изотопов. Максимальное наступание ледника в начале малого ледникового периода произошло в ~1250–1330 гг., второй максимум, когда ледник достиг почти такой же длины, датируется примерно 1810 г. С этого времени до 2018 г. площадь ледника уменьшилась с 14,9±1,5 до 9,9±0,5 км2 (33,8±7,4%, или ~0,16% год−1), а его длина сократилась на ~2280 м. |
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The project is supported by the fundamental scientific research № 0148-2019-0004 and Russian-French (CNRS-PICS) collaborative programs (DECAU IPAGCAUA) and LIA program DEGLAC. The study from Georgian side was supported by Shota Rustaveli National Science Foundation of Georgia (SRNSFG) YS17_12 . The 10Be measurements were performed at the ASTER AMS national facility (CEREGE. Aix-en-Provence) that is supported by the INSU/CNRS, the ANR through the «Projets thématiques d’excellence» program for the «Equipements d’excellence» ASTER-CEREGE action and IRD. ASTER Team includes Georges Aumaître, Didier L. Bourlès, Karim Keddadouche. We gratefully acknowledge the support of two reviewers, Dmitry Petrakov and anonymous reviewer 2, for detailed comments which clearly enhanced the quality of the paper. Special thanks to Lauren Vargo and Regis Braucher for proofreading the paper. Благодарности. Проект выполнен в рамках Госзадания № 0148-2019-0004 и российско-французского (CNRS-PICS) совместными программами (DECAU IPAGCAUA) и программой LIA DEGLAC. Исследование с грузинской стороны поддержано Национальным научным фондом Грузии им. Шота Руставели (SRNSFG) YS17_12 . Измерения 10Be проводились на национальном объекте ASTER AMS (CEREGE. Экс-ан-Прованс), который поддерживается INSU/CNRS, ANR в рамках программы «Projets thématiques d'Excellence» для «Equipements d'excellence» ASTER – CEREGE и IRD. В состав команды ASTER входят Жорж Ауматр, Дидье Л. Бурлес, Карим Кеддадуш. Мы благодарны двум рецензентам, Дмитрию Петракову и А.М. Грачеву, за подробные комментарии, которые значительно улучшили качество статьи. Выражаем также благодарность Лорен Варго и Реджису Браухеру за помощь в правке текста. |
| format |
Article in Journal/Newspaper |
| author |
L. Tielidze G. O. Solomina N. V. Jomelli E. Dolgova A. I. Bushueva S. V. Mikhalenko N. R. Brauche Team ASTER Л. Тиелидзе Г. О. Соломина Н. В. Джомелли Е. Долгова А. И. Бушуева С. В. Михаленко Н. Р. Брошэ Команда АСТЕР |
| author_facet |
L. Tielidze G. O. Solomina N. V. Jomelli E. Dolgova A. I. Bushueva S. V. Mikhalenko N. R. Brauche Team ASTER Л. Тиелидзе Г. О. Соломина Н. В. Джомелли Е. Долгова А. И. Бушуева С. В. Михаленко Н. Р. Брошэ Команда АСТЕР |
| author_sort |
L. Tielidze G. |
| title |
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_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_sort |
change of chalaati glacier (georgian caucasus) since the little ice age based on dendrochronological and beryllium‑10 data |
| publisher |
IGRAS |
| publishDate |
2020 |
| url |
https://ice-snow.igras.ru/jour/article/view/823 https://doi.org/10.31857/S2076673420030052 |
| genre |
Antarctic and Alpine Research Arctic Arctic and Alpine Research The Cryosphere |
| genre_facet |
Antarctic and Alpine Research Arctic Arctic and Alpine Research The Cryosphere |
| op_source |
Ice and Snow; Том 60, № 3 (2020); 453-470 Лёд и Снег; Том 60, № 3 (2020); 453-470 2412-3765 2076-6734 |
| op_relation |
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ftjias:oai:oai.ice.elpub.ru:article/823 2023-05-15T14:14:43+02:00 Change of Chalaati Glacier (Georgian Caucasus) since the Little Ice Age based on dendrochronological and Beryllium‑10 data Изменения ледника Чалаати (Грузинский Кавказ) с малого ледникового периода по данным космогенных изотопов (10Be) и дендрохронологии L. Tielidze G. O. Solomina N. V. Jomelli E. Dolgova A. I. Bushueva S. V. Mikhalenko N. R. Brauche Team ASTER Л. Тиелидзе Г. О. Соломина Н. В. Джомелли Е. Долгова А. И. Бушуева С. В. Михаленко Н. Р. Брошэ Команда АСТЕР The project is supported by the fundamental scientific research № 0148-2019-0004 and Russian-French (CNRS-PICS) collaborative programs (DECAU IPAGCAUA) and LIA program DEGLAC. The study from Georgian side was supported by Shota Rustaveli National Science Foundation of Georgia (SRNSFG) YS17_12 . The 10Be measurements were performed at the ASTER AMS national facility (CEREGE. Aix-en-Provence) that is supported by the INSU/CNRS, the ANR through the «Projets thématiques d’excellence» program for the «Equipements d’excellence» ASTER-CEREGE action and IRD. ASTER Team includes Georges Aumaître, Didier L. Bourlès, Karim Keddadouche. We gratefully acknowledge the support of two reviewers, Dmitry Petrakov and anonymous reviewer 2, for detailed comments which clearly enhanced the quality of the paper. Special thanks to Lauren Vargo and Regis Braucher for proofreading the paper. Благодарности. Проект выполнен в рамках Госзадания № 0148-2019-0004 и российско-французского (CNRS-PICS) совместными программами (DECAU IPAGCAUA) и программой LIA DEGLAC. Исследование с грузинской стороны поддержано Национальным научным фондом Грузии им. Шота Руставели (SRNSFG) YS17_12 . Измерения 10Be проводились на национальном объекте ASTER AMS (CEREGE. Экс-ан-Прованс), который поддерживается INSU/CNRS, ANR в рамках программы «Projets thématiques d'Excellence» для «Equipements d'excellence» ASTER – CEREGE и IRD. В состав команды ASTER входят Жорж Ауматр, Дидье Л. Бурлес, Карим Кеддадуш. Мы благодарны двум рецензентам, Дмитрию Петракову и А.М. Грачеву, за подробные комментарии, которые значительно улучшили качество статьи. Выражаем также благодарность Лорен Варго и Реджису Браухеру за помощь в правке текста. 2020-08-12 application/pdf https://ice-snow.igras.ru/jour/article/view/823 https://doi.org/10.31857/S2076673420030052 eng eng IGRAS https://ice-snow.igras.ru/jour/article/view/823/531 Matthes F.E. Report of the committee on glaciers, 1939– 40. Transactions of the American Geophys. Union. 1940, 1: 396–406. http://glaciers research.pdx.edu/Report-Committee-Glaciers-1939-40. 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CC-BY Ice and Snow; Том 60, № 3 (2020); 453-470 Лёд и Снег; Том 60, № 3 (2020); 453-470 2412-3765 2076-6734 Cosmic Ray Exposure dating;dendrochronology;glacier variation;Greater Caucasus;Little Ice Age Большой Кавказ;дендрохронология;колебания ледников;космогенные датировки;малый ледниковый период info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2020 ftjias https://doi.org/10.31857/S2076673420030052 https://doi.org/10.1016/j.quascirev.2016.04.008 https://doi.org/10.1038/nclimate2174 https://doi.org/10.1007/s00382-011-1145-7 https://doi.org/10.15356/2076-6734-2012-1-85-94 https://doi.org/10.1016/j.g 2022-12-20T13:30:01Z 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. Для реконструкции колебаний ледника Чалаати в Грузии использовались космические снимки, старые карты, повторные фотографии, дендрохронология, лихенометрия и анализ космогенных изотопов. Максимальное наступание ледника в начале малого ледникового периода произошло в ~1250–1330 гг., второй максимум, когда ледник достиг почти такой же длины, датируется примерно 1810 г. С этого времени до 2018 г. площадь ледника уменьшилась с 14,9±1,5 до 9,9±0,5 км2 (33,8±7,4%, или ~0,16% год−1), а его длина сократилась на ~2280 м. 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