Simultaneous drainage events from supraglacial lakes on the southern Inylchek Glacier, Central Asia
To understand the mechanism of simultaneous drainage event related to supraglacial lakes on a debris-covered glacier, we investigated water-level variations of supraglacial lakes on the southern Inylchek Glacier in Kyrgyzstan. To examine these variations, we used daily aerial images for 2017–2019 fr...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press
2022
|
Subjects: | |
Online Access: | https://doi.org/10.1017/jog.2021.77 https://doaj.org/article/1de8eb3ab3974c39bd61f95907e49147 |
id |
ftdoajarticles:oai:doaj.org/article:1de8eb3ab3974c39bd61f95907e49147 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:1de8eb3ab3974c39bd61f95907e49147 2023-05-15T16:57:33+02:00 Simultaneous drainage events from supraglacial lakes on the southern Inylchek Glacier, Central Asia Naoki Sakurai Chiyuki Narama Mirlan Daiyrov Muhammed Esenamanov Zarylbek Usekov Hiroshi Inoue 2022-04-01T00:00:00Z https://doi.org/10.1017/jog.2021.77 https://doaj.org/article/1de8eb3ab3974c39bd61f95907e49147 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143021000770/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2021.77 0022-1430 1727-5652 https://doaj.org/article/1de8eb3ab3974c39bd61f95907e49147 Journal of Glaciology, Vol 68, Pp 209-220 (2022) Debris-covered glaciers glacier discharge glacier hazards glacier hydrology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2022 ftdoajarticles https://doi.org/10.1017/jog.2021.77 2023-03-12T01:30:57Z To understand the mechanism of simultaneous drainage event related to supraglacial lakes on a debris-covered glacier, we investigated water-level variations of supraglacial lakes on the southern Inylchek Glacier in Kyrgyzstan. To examine these variations, we used daily aerial images for 2017–2019 from an uncrewed aerial vehicle that were converted to 15 cm-digital surface models and ortho-images. Our main results are as follows: (1) When one lake drained, the water levels of other lakes simultaneously increased, indicating that drainage water is shared with several lakes through a main englacial conduit. In one drainage event, a branched off englacial conduit clearly connected to a main englacial conduit. (2) Sometimes several lakes discharged simultaneously, indicating that several lakes had connected to a main englacial conduit that had opened. Such cases can cause larger-scale drainage than that from the opening of a branched off englacial conduit. (3) Simultaneous drainage occurred twice in the same year, each time through a different conduit, indicating that the main englacial conduit can be abandoned and reused. (4) In some lakes, the water level on the hydraulic gradient line increased gradually with nearly the same increase rate just before drainage. Such an increase may be an indicator of a possible simultaneous drainage event. Article in Journal/Newspaper Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Journal of Glaciology 68 268 209 220 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Debris-covered glaciers glacier discharge glacier hazards glacier hydrology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Debris-covered glaciers glacier discharge glacier hazards glacier hydrology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Naoki Sakurai Chiyuki Narama Mirlan Daiyrov Muhammed Esenamanov Zarylbek Usekov Hiroshi Inoue Simultaneous drainage events from supraglacial lakes on the southern Inylchek Glacier, Central Asia |
topic_facet |
Debris-covered glaciers glacier discharge glacier hazards glacier hydrology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
To understand the mechanism of simultaneous drainage event related to supraglacial lakes on a debris-covered glacier, we investigated water-level variations of supraglacial lakes on the southern Inylchek Glacier in Kyrgyzstan. To examine these variations, we used daily aerial images for 2017–2019 from an uncrewed aerial vehicle that were converted to 15 cm-digital surface models and ortho-images. Our main results are as follows: (1) When one lake drained, the water levels of other lakes simultaneously increased, indicating that drainage water is shared with several lakes through a main englacial conduit. In one drainage event, a branched off englacial conduit clearly connected to a main englacial conduit. (2) Sometimes several lakes discharged simultaneously, indicating that several lakes had connected to a main englacial conduit that had opened. Such cases can cause larger-scale drainage than that from the opening of a branched off englacial conduit. (3) Simultaneous drainage occurred twice in the same year, each time through a different conduit, indicating that the main englacial conduit can be abandoned and reused. (4) In some lakes, the water level on the hydraulic gradient line increased gradually with nearly the same increase rate just before drainage. Such an increase may be an indicator of a possible simultaneous drainage event. |
format |
Article in Journal/Newspaper |
author |
Naoki Sakurai Chiyuki Narama Mirlan Daiyrov Muhammed Esenamanov Zarylbek Usekov Hiroshi Inoue |
author_facet |
Naoki Sakurai Chiyuki Narama Mirlan Daiyrov Muhammed Esenamanov Zarylbek Usekov Hiroshi Inoue |
author_sort |
Naoki Sakurai |
title |
Simultaneous drainage events from supraglacial lakes on the southern Inylchek Glacier, Central Asia |
title_short |
Simultaneous drainage events from supraglacial lakes on the southern Inylchek Glacier, Central Asia |
title_full |
Simultaneous drainage events from supraglacial lakes on the southern Inylchek Glacier, Central Asia |
title_fullStr |
Simultaneous drainage events from supraglacial lakes on the southern Inylchek Glacier, Central Asia |
title_full_unstemmed |
Simultaneous drainage events from supraglacial lakes on the southern Inylchek Glacier, Central Asia |
title_sort |
simultaneous drainage events from supraglacial lakes on the southern inylchek glacier, central asia |
publisher |
Cambridge University Press |
publishDate |
2022 |
url |
https://doi.org/10.1017/jog.2021.77 https://doaj.org/article/1de8eb3ab3974c39bd61f95907e49147 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 68, Pp 209-220 (2022) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143021000770/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2021.77 0022-1430 1727-5652 https://doaj.org/article/1de8eb3ab3974c39bd61f95907e49147 |
op_doi |
https://doi.org/10.1017/jog.2021.77 |
container_title |
Journal of Glaciology |
container_volume |
68 |
container_issue |
268 |
container_start_page |
209 |
op_container_end_page |
220 |
_version_ |
1766049117653434368 |