Glacioclimatological investigations of the Institute of Geography, RAS, in the crater of Eastern Summit of Mt. Elbrus in 2020
During the field campaign in August 18–30, 2020 the meteorological regime and heat balance of the glacier surface were investigated in the crater of Mt Elbrus Eastern Summit (5600 m a.s.l.) together with the GPR measurements of the ice thickness and seasonal snow cover. Preliminary data analysis all...
Main Authors: | , , , , , , |
---|---|
Format: | Article |
Language: | Russian |
Published: |
Nauka
2021-03-01
|
Series: | Лëд и снег |
Subjects: | |
Online Access: | https://ice-snow.igras.ru/jour/article/view/877 |
_version_ | 1797878126548615168 |
---|---|
author | V. N. Mikhalenko S. S. Kutuzov I. I. Lavrentiev P. A. Toropov D. O. Vladimirova A. A. Abramov V. V. Matskovsky |
author_facet | V. N. Mikhalenko S. S. Kutuzov I. I. Lavrentiev P. A. Toropov D. O. Vladimirova A. A. Abramov V. V. Matskovsky |
author_sort | V. N. Mikhalenko |
collection | DOAJ |
description | During the field campaign in August 18–30, 2020 the meteorological regime and heat balance of the glacier surface were investigated in the crater of Mt Elbrus Eastern Summit (5600 m a.s.l.) together with the GPR measurements of the ice thickness and seasonal snow cover. Preliminary data analysis allowed the following features: the predominance of synoptic fluctuations over the diurnal ones; the high values of average and maximum wind speed associated with the impact of jet streams and with influence of leeward storms; extremely high temporal variability of relative humidity and its very high deficit in cloudless conditions conducive to intensive evaporation and sublimation from the snow surface. The maximum thickness of ice in the crater reaches 100 m, and the average is 34 m. A new ice core with a length of 96.01 m from the glacier surface to its bed had been obtained. The drilling speed varied from 11 to 1 m/h, decreasing with depth from 4.5 to 4.0 m/h on average. The thickness of the snow-firn mass is about 20 m, which is three times less than on the Western Plateau of Mt Elbrus. According to measurements in the borehole, temperature at the glacier bed is −0.6 °C. The calculated heat flux is 0.39 W/m2. Air sampling was carried out in the crater of the Eastern Summit of Elbrus and on the Garabashi glacier. Repeated measurements of the soil temperature in the fumarole field on the outer edge of the crater of the Elbrus Eastern Summit allow the conclusion that the temperature regime is stable. |
first_indexed | 2024-04-10T02:27:44Z |
format | Article |
id | doaj.art-03b858ca39cd4a8c970366348f16bc9b |
institution | Directory Open Access Journal |
issn | 2076-6734 2412-3765 |
language | Russian |
last_indexed | 2024-04-10T02:27:44Z |
publishDate | 2021-03-01 |
publisher | Nauka |
record_format | Article |
series | Лëд и снег |
spelling | doaj.art-03b858ca39cd4a8c970366348f16bc9b2023-03-13T08:01:20ZrusNaukaЛëд и снег2076-67342412-37652021-03-0161114916010.31857/S2076673421010078655Glacioclimatological investigations of the Institute of Geography, RAS, in the crater of Eastern Summit of Mt. Elbrus in 2020V. N. Mikhalenko0S. S. Kutuzov1I. I. Lavrentiev2P. A. Toropov3D. O. Vladimirova4A. A. Abramov5V. V. Matskovsky6Институт географии РАНИнститут географии РАНИнститут географии РАНИнститут географии РАН; Московский государственный университет имени М.В. ЛомоносоваИнститут географии РАНИнститут физико-химических и биологических проблем почвоведения РАНИнститут географии РАНDuring the field campaign in August 18–30, 2020 the meteorological regime and heat balance of the glacier surface were investigated in the crater of Mt Elbrus Eastern Summit (5600 m a.s.l.) together with the GPR measurements of the ice thickness and seasonal snow cover. Preliminary data analysis allowed the following features: the predominance of synoptic fluctuations over the diurnal ones; the high values of average and maximum wind speed associated with the impact of jet streams and with influence of leeward storms; extremely high temporal variability of relative humidity and its very high deficit in cloudless conditions conducive to intensive evaporation and sublimation from the snow surface. The maximum thickness of ice in the crater reaches 100 m, and the average is 34 m. A new ice core with a length of 96.01 m from the glacier surface to its bed had been obtained. The drilling speed varied from 11 to 1 m/h, decreasing with depth from 4.5 to 4.0 m/h on average. The thickness of the snow-firn mass is about 20 m, which is three times less than on the Western Plateau of Mt Elbrus. According to measurements in the borehole, temperature at the glacier bed is −0.6 °C. The calculated heat flux is 0.39 W/m2. Air sampling was carried out in the crater of the Eastern Summit of Elbrus and on the Garabashi glacier. Repeated measurements of the soil temperature in the fumarole field on the outer edge of the crater of the Elbrus Eastern Summit allow the conclusion that the temperature regime is stable.https://ice-snow.igras.ru/jour/article/view/877эльбруследниковый кернметеорологический режимтепловой баланстепловой потокметантемпература грунта |
spellingShingle | V. N. Mikhalenko S. S. Kutuzov I. I. Lavrentiev P. A. Toropov D. O. Vladimirova A. A. Abramov V. V. Matskovsky Glacioclimatological investigations of the Institute of Geography, RAS, in the crater of Eastern Summit of Mt. Elbrus in 2020 Лëд и снег эльбрус ледниковый керн метеорологический режим тепловой баланс тепловой поток метан температура грунта |
title | Glacioclimatological investigations of the Institute of Geography, RAS, in the crater of Eastern Summit of Mt. Elbrus in 2020 |
title_full | Glacioclimatological investigations of the Institute of Geography, RAS, in the crater of Eastern Summit of Mt. Elbrus in 2020 |
title_fullStr | Glacioclimatological investigations of the Institute of Geography, RAS, in the crater of Eastern Summit of Mt. Elbrus in 2020 |
title_full_unstemmed | Glacioclimatological investigations of the Institute of Geography, RAS, in the crater of Eastern Summit of Mt. Elbrus in 2020 |
title_short | Glacioclimatological investigations of the Institute of Geography, RAS, in the crater of Eastern Summit of Mt. Elbrus in 2020 |
title_sort | glacioclimatological investigations of the institute of geography ras in the crater of eastern summit of mt elbrus in 2020 |
topic | эльбрус ледниковый керн метеорологический режим тепловой баланс тепловой поток метан температура грунта |
url | https://ice-snow.igras.ru/jour/article/view/877 |
work_keys_str_mv | AT vnmikhalenko glacioclimatologicalinvestigationsoftheinstituteofgeographyrasinthecraterofeasternsummitofmtelbrusin2020 AT sskutuzov glacioclimatologicalinvestigationsoftheinstituteofgeographyrasinthecraterofeasternsummitofmtelbrusin2020 AT iilavrentiev glacioclimatologicalinvestigationsoftheinstituteofgeographyrasinthecraterofeasternsummitofmtelbrusin2020 AT patoropov glacioclimatologicalinvestigationsoftheinstituteofgeographyrasinthecraterofeasternsummitofmtelbrusin2020 AT dovladimirova glacioclimatologicalinvestigationsoftheinstituteofgeographyrasinthecraterofeasternsummitofmtelbrusin2020 AT aaabramov glacioclimatologicalinvestigationsoftheinstituteofgeographyrasinthecraterofeasternsummitofmtelbrusin2020 AT vvmatskovsky glacioclimatologicalinvestigationsoftheinstituteofgeographyrasinthecraterofeasternsummitofmtelbrusin2020 |