Glacio-environmental aspects recorded in two shallow ice cores drilled in 1980 at accumulation area of Khumbu Glacier of Mt. Everest in Nepal Himalayas
The physical and geochemical characteristics of shallow ice cores drilled in the accumulation area (Western Cwm) of Khumbu Glacier in the Nepal Himalayas in 1980 were analyzed. The two ice cores from different elevations (cores 1 and 2 from 6,100 and 6,400 m a.s.l., respectively) showed distinct str...
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Online Access: | https://doi.org/10.1080/15230430.2020.1833681 https://doaj.org/article/ee3b0e98f94440b78b5fe758c4dbb4d9 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:ee3b0e98f94440b78b5fe758c4dbb4d9 2023-05-15T14:14:22+02:00 Glacio-environmental aspects recorded in two shallow ice cores drilled in 1980 at accumulation area of Khumbu Glacier of Mt. Everest in Nepal Himalayas Nozomu Takeuchi Yoichiro Hori Noboru Furukawa Minoru Yoshida Yoshiyuki Fujii 2020-01-01 https://doi.org/10.1080/15230430.2020.1833681 https://doaj.org/article/ee3b0e98f94440b78b5fe758c4dbb4d9 en eng Taylor & Francis Group 1523-0430 1938-4246 doi:10.1080/15230430.2020.1833681 https://doaj.org/article/ee3b0e98f94440b78b5fe758c4dbb4d9 undefined Arctic, Antarctic, and Alpine Research, Vol 52, Iss 1, Pp 605-616 (2020) himalayas khumbu glacier debris-covered glacier ice core avalanche geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.1080/15230430.2020.1833681 2023-01-22T18:47:21Z The physical and geochemical characteristics of shallow ice cores drilled in the accumulation area (Western Cwm) of Khumbu Glacier in the Nepal Himalayas in 1980 were analyzed. The two ice cores from different elevations (cores 1 and 2 from 6,100 and 6,400 m a.s.l., respectively) showed distinct stratigraphy: Core 1 consisted of stratified firn layers with a few ice and dust layers, whereas core 2 consisted of unstratified refrozen ice with abundant debris. The mean oxygen-stable isotope was significantly lower in core 2 than in core 1, and the composition of major soluble ions also differed between the ice cores. The mineralogical characteristics of debris in core 2 were in accordance with the geology of the south face of Mt. Everest, indicating that it was supplied from above 7,000 m a.s.l. by avalanches. The distinct stratigraphy and geochemistry suggest that the snow accumulation process differed between the two drilling sites; snow was supplied by precipitation in core 1, whereas in core 2 it was supplied by avalanche with rock debris from the higher site of the south face of Mt. Everest. The two distinct snow accumulation processes are likely to characterize the mass balance and formation of debris covers of the lower ablation area of Khumbu Glacier. Article in Journal/Newspaper Antarctic and Alpine Research Arctic ice core Unknown Arctic, Antarctic, and Alpine Research 52 1 605 616 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
himalayas khumbu glacier debris-covered glacier ice core avalanche geo envir |
spellingShingle |
himalayas khumbu glacier debris-covered glacier ice core avalanche geo envir Nozomu Takeuchi Yoichiro Hori Noboru Furukawa Minoru Yoshida Yoshiyuki Fujii Glacio-environmental aspects recorded in two shallow ice cores drilled in 1980 at accumulation area of Khumbu Glacier of Mt. Everest in Nepal Himalayas |
topic_facet |
himalayas khumbu glacier debris-covered glacier ice core avalanche geo envir |
description |
The physical and geochemical characteristics of shallow ice cores drilled in the accumulation area (Western Cwm) of Khumbu Glacier in the Nepal Himalayas in 1980 were analyzed. The two ice cores from different elevations (cores 1 and 2 from 6,100 and 6,400 m a.s.l., respectively) showed distinct stratigraphy: Core 1 consisted of stratified firn layers with a few ice and dust layers, whereas core 2 consisted of unstratified refrozen ice with abundant debris. The mean oxygen-stable isotope was significantly lower in core 2 than in core 1, and the composition of major soluble ions also differed between the ice cores. The mineralogical characteristics of debris in core 2 were in accordance with the geology of the south face of Mt. Everest, indicating that it was supplied from above 7,000 m a.s.l. by avalanches. The distinct stratigraphy and geochemistry suggest that the snow accumulation process differed between the two drilling sites; snow was supplied by precipitation in core 1, whereas in core 2 it was supplied by avalanche with rock debris from the higher site of the south face of Mt. Everest. The two distinct snow accumulation processes are likely to characterize the mass balance and formation of debris covers of the lower ablation area of Khumbu Glacier. |
format |
Article in Journal/Newspaper |
author |
Nozomu Takeuchi Yoichiro Hori Noboru Furukawa Minoru Yoshida Yoshiyuki Fujii |
author_facet |
Nozomu Takeuchi Yoichiro Hori Noboru Furukawa Minoru Yoshida Yoshiyuki Fujii |
author_sort |
Nozomu Takeuchi |
title |
Glacio-environmental aspects recorded in two shallow ice cores drilled in 1980 at accumulation area of Khumbu Glacier of Mt. Everest in Nepal Himalayas |
title_short |
Glacio-environmental aspects recorded in two shallow ice cores drilled in 1980 at accumulation area of Khumbu Glacier of Mt. Everest in Nepal Himalayas |
title_full |
Glacio-environmental aspects recorded in two shallow ice cores drilled in 1980 at accumulation area of Khumbu Glacier of Mt. Everest in Nepal Himalayas |
title_fullStr |
Glacio-environmental aspects recorded in two shallow ice cores drilled in 1980 at accumulation area of Khumbu Glacier of Mt. Everest in Nepal Himalayas |
title_full_unstemmed |
Glacio-environmental aspects recorded in two shallow ice cores drilled in 1980 at accumulation area of Khumbu Glacier of Mt. Everest in Nepal Himalayas |
title_sort |
glacio-environmental aspects recorded in two shallow ice cores drilled in 1980 at accumulation area of khumbu glacier of mt. everest in nepal himalayas |
publisher |
Taylor & Francis Group |
publishDate |
2020 |
url |
https://doi.org/10.1080/15230430.2020.1833681 https://doaj.org/article/ee3b0e98f94440b78b5fe758c4dbb4d9 |
genre |
Antarctic and Alpine Research Arctic ice core |
genre_facet |
Antarctic and Alpine Research Arctic ice core |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 52, Iss 1, Pp 605-616 (2020) |
op_relation |
1523-0430 1938-4246 doi:10.1080/15230430.2020.1833681 https://doaj.org/article/ee3b0e98f94440b78b5fe758c4dbb4d9 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/15230430.2020.1833681 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
52 |
container_issue |
1 |
container_start_page |
605 |
op_container_end_page |
616 |
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