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Conference Paper: Spatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China

TitleSpatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western China
Authors
Issue Date2006
PublisherInternational Glaciological Society. The Journal's web site is located at http://www.igsoc.org/annals/
Citation
Annals Of Glaciology, 2006, v. 43, p. 269-274 How to Cite?
AbstractIn 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.
Persistent Identifierhttp://hdl.handle.net/10722/159114
ISSN
2015 Impact Factor: 1.589
2015 SCImago Journal Rankings: 1.383
References

 

DC FieldValueLanguage
dc.contributor.authorHe, Yen_US
dc.contributor.authorPang, Hen_US
dc.contributor.authorTheakstone, WHen_US
dc.contributor.authorZhang, Den_US
dc.contributor.authorLu, Aen_US
dc.contributor.authorSong, Ben_US
dc.contributor.authorYuan, Len_US
dc.contributor.authorNing, Ben_US
dc.date.accessioned2012-08-08T09:08:05Z-
dc.date.available2012-08-08T09:08:05Z-
dc.date.issued2006en_US
dc.identifier.citationAnnals Of Glaciology, 2006, v. 43, p. 269-274en_US
dc.identifier.issn0260-3055en_US
dc.identifier.urihttp://hdl.handle.net/10722/159114-
dc.description.abstractIn 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.en_US
dc.languageengen_US
dc.publisherInternational Glaciological Society. The Journal's web site is located at http://www.igsoc.org/annals/en_US
dc.relation.ispartofAnnals of Glaciologyen_US
dc.titleSpatial and temporal variations of oxygen isotopes in snowpacks and glacial runoff in different types of glacial area in western Chinaen_US
dc.typeConference_Paperen_US
dc.identifier.emailZhang, D:zhangd@hkucc.hku.hken_US
dc.identifier.authorityZhang, D=rp00649en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.3189/172756406781811943en_US
dc.identifier.scopuseid_2-s2.0-33846046083en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33846046083&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume43en_US
dc.identifier.spage269en_US
dc.identifier.epage274en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridHe, Y=7404942217en_US
dc.identifier.scopusauthoridPang, H=7102237529en_US
dc.identifier.scopusauthoridTheakstone, WH=7003836274en_US
dc.identifier.scopusauthoridZhang, D=9732911600en_US
dc.identifier.scopusauthoridLu, A=51864222300en_US
dc.identifier.scopusauthoridSong, B=7402560567en_US
dc.identifier.scopusauthoridYuan, L=55236098900en_US
dc.identifier.scopusauthoridNing, B=11239700900en_US
dc.identifier.citeulike3338906-

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