Accumulation and flow rates of ice on Chhota Shigri glacier, central Himalaya, using radio-active and stable isotopes
Abstract Systematic isotopic studies based on natural and artificial radio-isotopes ( 32 Si, 137 Cs), stable isotopes (δ 18 O) and total β activity measurements have been carried out on Chhota Shigri glacier, Himachal Pradesh, central Himalaya, to study the dynamics of the ice, meltwater composition...
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Cambridge University Press (CUP)
1992
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Online Access: | http://dx.doi.org/10.1017/s0022143000009588 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000009588 |
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crcambridgeupr:10.1017/s0022143000009588 2024-03-03T08:45:21+00:00 Accumulation and flow rates of ice on Chhota Shigri glacier, central Himalaya, using radio-active and stable isotopes Nijampurkar, V. N. Rao, D. K. 1992 http://dx.doi.org/10.1017/s0022143000009588 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000009588 en eng Cambridge University Press (CUP) Journal of Glaciology volume 38, issue 128, page 43-50 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1992 crcambridgeupr https://doi.org/10.1017/s0022143000009588 2024-02-08T08:42:50Z Abstract Systematic isotopic studies based on natural and artificial radio-isotopes ( 32 Si, 137 Cs), stable isotopes (δ 18 O) and total β activity measurements have been carried out on Chhota Shigri glacier, Himachal Pradesh, central Himalaya, to study the dynamics of the ice, meltwater composition and to identify the deposition of the Chernobyl fall-out in the Himalayan region. Using 32 Si concentrations, the snout ice has been dated at ~ 250 years, based on which the past average surface ice-flow rate has been estimated as ~ 28 m year −1 . Based on δ 18 O variations, in a shallow ice core, the accumulation rate of the ice has been estimated at ~520kgm −2 year −1 . 32 Si measurements of snout ice and englacial meltwaters indicate that at least 55% of the snow meltwater mixed with 45% of the old ice-melt water that emerged from englacial streams in the month of August 1987. Deposition of the artificial radionuclide ( 137 Cs) and the very high total β activity observed in snow samples on Chhota Shigri glacier give the first evidence of Chernobyl fall-out deposition in the Indian Himalaya. Article in Journal/Newspaper ice core Journal of Glaciology Cambridge University Press Indian Journal of Glaciology 38 128 43 50 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Nijampurkar, V. N. Rao, D. K. Accumulation and flow rates of ice on Chhota Shigri glacier, central Himalaya, using radio-active and stable isotopes |
topic_facet |
Earth-Surface Processes |
description |
Abstract Systematic isotopic studies based on natural and artificial radio-isotopes ( 32 Si, 137 Cs), stable isotopes (δ 18 O) and total β activity measurements have been carried out on Chhota Shigri glacier, Himachal Pradesh, central Himalaya, to study the dynamics of the ice, meltwater composition and to identify the deposition of the Chernobyl fall-out in the Himalayan region. Using 32 Si concentrations, the snout ice has been dated at ~ 250 years, based on which the past average surface ice-flow rate has been estimated as ~ 28 m year −1 . Based on δ 18 O variations, in a shallow ice core, the accumulation rate of the ice has been estimated at ~520kgm −2 year −1 . 32 Si measurements of snout ice and englacial meltwaters indicate that at least 55% of the snow meltwater mixed with 45% of the old ice-melt water that emerged from englacial streams in the month of August 1987. Deposition of the artificial radionuclide ( 137 Cs) and the very high total β activity observed in snow samples on Chhota Shigri glacier give the first evidence of Chernobyl fall-out deposition in the Indian Himalaya. |
format |
Article in Journal/Newspaper |
author |
Nijampurkar, V. N. Rao, D. K. |
author_facet |
Nijampurkar, V. N. Rao, D. K. |
author_sort |
Nijampurkar, V. N. |
title |
Accumulation and flow rates of ice on Chhota Shigri glacier, central Himalaya, using radio-active and stable isotopes |
title_short |
Accumulation and flow rates of ice on Chhota Shigri glacier, central Himalaya, using radio-active and stable isotopes |
title_full |
Accumulation and flow rates of ice on Chhota Shigri glacier, central Himalaya, using radio-active and stable isotopes |
title_fullStr |
Accumulation and flow rates of ice on Chhota Shigri glacier, central Himalaya, using radio-active and stable isotopes |
title_full_unstemmed |
Accumulation and flow rates of ice on Chhota Shigri glacier, central Himalaya, using radio-active and stable isotopes |
title_sort |
accumulation and flow rates of ice on chhota shigri glacier, central himalaya, using radio-active and stable isotopes |
publisher |
Cambridge University Press (CUP) |
publishDate |
1992 |
url |
http://dx.doi.org/10.1017/s0022143000009588 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000009588 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
ice core Journal of Glaciology |
genre_facet |
ice core Journal of Glaciology |
op_source |
Journal of Glaciology volume 38, issue 128, page 43-50 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000009588 |
container_title |
Journal of Glaciology |
container_volume |
38 |
container_issue |
128 |
container_start_page |
43 |
op_container_end_page |
50 |
_version_ |
1792500898163851264 |