Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China
In order to improve understanding of spatial and temporal variations of stable isotopes in atmospheric precipitation, snow cover and glacier meltwater in different regions of China, samples were collected for isotopic analysis in four areas: Yulong mountain, Yunnan Himalaya (temperate-glacier area);...
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Online Access: | https://research.manchester.ac.uk/en/publications/8aa725e9-cc75-4e17-98ca-998c0de3db85 https://doi.org/10.3189/172756406781811943 |
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ftumanchesterpub:oai:pure.atira.dk:publications/8aa725e9-cc75-4e17-98ca-998c0de3db85 2023-11-12T04:01:27+01:00 Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China He, Yuanqing Pang, Hongxi Theakstone, W. H. Zhang, Dian Lu, Aigang Song, Bo Yuan, Lingling Ning, Baoying 2006 https://research.manchester.ac.uk/en/publications/8aa725e9-cc75-4e17-98ca-998c0de3db85 https://doi.org/10.3189/172756406781811943 eng eng info:eu-repo/semantics/closedAccess He , Y , Pang , H , Theakstone , W H , Zhang , D , Lu , A , Song , B , Yuan , L & Ning , B 2006 , ' Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China ' , Annals of Glaciology , vol. 43 , pp. 269-274 . https://doi.org/10.3189/172756406781811943 article 2006 ftumanchesterpub https://doi.org/10.3189/172756406781811943 2023-10-30T09:14:36Z In order to improve understanding of spatial and temporal variations of stable isotopes in atmospheric precipitation, snow cover and glacier meltwater in different regions of China, samples were collected for isotopic analysis in four areas: Yulong mountain, Yunnan Himalaya (temperate-glacier area); Samdain Kangsang mountain, Nyainqêntanglha Shan (subpolar-glacier area); the headwater area of the Ürümqi river, Tien Shan (subpolar-glacier area); and Muztag mountain, Pamirs (polar-glacier area). Sampling was undertaken in both summer and winter between 2000 and 2003. The δ 18O values show a 'temperature-altitude effect' in new winter snow on Yulong mountain, reflecting the condensation and fractionation processes associated with the winter monsoon, but a different, more complex pattern in residual snow deposited during the summer monsoon; this old snow is influenced by the 'precipitation amount effect', solar radiation and evaporation, and the water content of the snowpack. The summer precipitation at Samdain Kangsang mountain is associated with the summer monsoon. There is a marked precipitation amount effect during the long passage of the southwest/India monsoon from the distant moisture source to Samdain Kangsang mountain, and the summer precipitation is strongly depleted of the heavy isotope. Above 6000 m, the high radiation flux causes much evaporation from the snow surface. The associated 18O enrichment of the snow is reflected in a 'reverse altitude effect'. The δ 18O values in the summer snowpack of the Tien Shan and Muztag mountain decrease with increasing altitude and decreasing air temperature, indicating a temperature-altitude effect. Post-depositional processes cause isotopic changes during the transformation of snow/firn/ice to meltwater; the effects are much stronger at temperate than at polar glaciers. Moreover, changes in the isotopic signal at both temperate and polar glaciers can result from evaporation, sublimation, ablation and drifting. Article in Journal/Newspaper Annals of Glaciology The University of Manchester: Research Explorer Annals of Glaciology 43 269 274 |
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Open Polar |
collection |
The University of Manchester: Research Explorer |
op_collection_id |
ftumanchesterpub |
language |
English |
description |
In order to improve understanding of spatial and temporal variations of stable isotopes in atmospheric precipitation, snow cover and glacier meltwater in different regions of China, samples were collected for isotopic analysis in four areas: Yulong mountain, Yunnan Himalaya (temperate-glacier area); Samdain Kangsang mountain, Nyainqêntanglha Shan (subpolar-glacier area); the headwater area of the Ürümqi river, Tien Shan (subpolar-glacier area); and Muztag mountain, Pamirs (polar-glacier area). Sampling was undertaken in both summer and winter between 2000 and 2003. The δ 18O values show a 'temperature-altitude effect' in new winter snow on Yulong mountain, reflecting the condensation and fractionation processes associated with the winter monsoon, but a different, more complex pattern in residual snow deposited during the summer monsoon; this old snow is influenced by the 'precipitation amount effect', solar radiation and evaporation, and the water content of the snowpack. The summer precipitation at Samdain Kangsang mountain is associated with the summer monsoon. There is a marked precipitation amount effect during the long passage of the southwest/India monsoon from the distant moisture source to Samdain Kangsang mountain, and the summer precipitation is strongly depleted of the heavy isotope. Above 6000 m, the high radiation flux causes much evaporation from the snow surface. The associated 18O enrichment of the snow is reflected in a 'reverse altitude effect'. The δ 18O values in the summer snowpack of the Tien Shan and Muztag mountain decrease with increasing altitude and decreasing air temperature, indicating a temperature-altitude effect. Post-depositional processes cause isotopic changes during the transformation of snow/firn/ice to meltwater; the effects are much stronger at temperate than at polar glaciers. Moreover, changes in the isotopic signal at both temperate and polar glaciers can result from evaporation, sublimation, ablation and drifting. |
format |
Article in Journal/Newspaper |
author |
He, Yuanqing Pang, Hongxi Theakstone, W. H. Zhang, Dian Lu, Aigang Song, Bo Yuan, Lingling Ning, Baoying |
spellingShingle |
He, Yuanqing Pang, Hongxi Theakstone, W. H. Zhang, Dian Lu, Aigang Song, Bo Yuan, Lingling Ning, Baoying Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China |
author_facet |
He, Yuanqing Pang, Hongxi Theakstone, W. H. Zhang, Dian Lu, Aigang Song, Bo Yuan, Lingling Ning, Baoying |
author_sort |
He, Yuanqing |
title |
Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China |
title_short |
Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China |
title_full |
Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China |
title_fullStr |
Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China |
title_full_unstemmed |
Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China |
title_sort |
spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western china |
publishDate |
2006 |
url |
https://research.manchester.ac.uk/en/publications/8aa725e9-cc75-4e17-98ca-998c0de3db85 https://doi.org/10.3189/172756406781811943 |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_source |
He , Y , Pang , H , Theakstone , W H , Zhang , D , Lu , A , Song , B , Yuan , L & Ning , B 2006 , ' Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China ' , Annals of Glaciology , vol. 43 , pp. 269-274 . https://doi.org/10.3189/172756406781811943 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.3189/172756406781811943 |
container_title |
Annals of Glaciology |
container_volume |
43 |
container_start_page |
269 |
op_container_end_page |
274 |
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1782332624799268864 |