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Conference Paper: Soluble ionic and oxygen isotopic compositions of a shallow firn profile, Baishui glacier no. 1, southeastern Tibetan Plateau

TitleSoluble ionic and oxygen isotopic compositions of a shallow firn profile, Baishui glacier no. 1, southeastern Tibetan Plateau
Authors
Issue Date2007
PublisherInternational Glaciological Society. The Journal's web site is located at http://www.igsoc.org/annals/
Citation
Annals Of Glaciology, 2007, v. 46, p. 325-330 How to Cite?
AbstractIn the summer of 2004, a firn profile, 18.3 m long, extending down to glacier ice, was recovered in the accumulation area of the largest glacier, Baishui No. 1, on Yulong mountain, the southernmost glacier-covered area in mainland Eurasia. Multivariate empirical orthogonal function (EOF) and statistical correlation analyses of major-ion data from the profile demonstrate that three distinct types of ionic material contribute to the chemical characteristics of firn in this monsoonal region: material of marine origin, which is transported by the Indian southwest monsoon; crustal materials, which come from local sources; and anthropogenic pollutants, which are produced by industrial and agricultural activities in South Asia. Although the influence of post-depositional processes on the seasonal isotopic and soluble ionic compositions is significant, dust layers in the firn profile are clearly visible. Due to the effects of meltwater percolation, the dust layers generally coincide with late-summer snow surfaces. We therefore use the dust layers, combined with the seasonal variations of electrical conductivity (EC), Ca2+ and Mg2+, to establish a depth/age scale for the firn profile. The reconstructed net accumulation has a significant negative correlation with the temperature at Lijiang, whereas the correlation between the net accumulation and the precipitation amount at Lijiang is weak. Although the δ18O time series of the firn profile was modified significantly by meltwater percolation, the correlation between annual mean δ18O values and the Indian southwest monsoon index (WSI1) is significant. This result suggests that δ18O records from monsoon-influenced temperate glaciers can provide a valuable record of past variations of the Indian southwest monsoon.
Persistent Identifierhttp://hdl.handle.net/10722/159117
ISSN
2015 Impact Factor: 1.589
2015 SCImago Journal Rankings: 1.383
References

 

DC FieldValueLanguage
dc.contributor.authorPang, Hen_US
dc.contributor.authorHe, Yen_US
dc.contributor.authorTheakstone, WHen_US
dc.contributor.authorZhang, DDen_US
dc.date.accessioned2012-08-08T09:08:05Z-
dc.date.available2012-08-08T09:08:05Z-
dc.date.issued2007en_US
dc.identifier.citationAnnals Of Glaciology, 2007, v. 46, p. 325-330en_US
dc.identifier.issn0260-3055en_US
dc.identifier.urihttp://hdl.handle.net/10722/159117-
dc.description.abstractIn the summer of 2004, a firn profile, 18.3 m long, extending down to glacier ice, was recovered in the accumulation area of the largest glacier, Baishui No. 1, on Yulong mountain, the southernmost glacier-covered area in mainland Eurasia. Multivariate empirical orthogonal function (EOF) and statistical correlation analyses of major-ion data from the profile demonstrate that three distinct types of ionic material contribute to the chemical characteristics of firn in this monsoonal region: material of marine origin, which is transported by the Indian southwest monsoon; crustal materials, which come from local sources; and anthropogenic pollutants, which are produced by industrial and agricultural activities in South Asia. Although the influence of post-depositional processes on the seasonal isotopic and soluble ionic compositions is significant, dust layers in the firn profile are clearly visible. Due to the effects of meltwater percolation, the dust layers generally coincide with late-summer snow surfaces. We therefore use the dust layers, combined with the seasonal variations of electrical conductivity (EC), Ca2+ and Mg2+, to establish a depth/age scale for the firn profile. The reconstructed net accumulation has a significant negative correlation with the temperature at Lijiang, whereas the correlation between the net accumulation and the precipitation amount at Lijiang is weak. Although the δ18O time series of the firn profile was modified significantly by meltwater percolation, the correlation between annual mean δ18O values and the Indian southwest monsoon index (WSI1) is significant. This result suggests that δ18O records from monsoon-influenced temperate glaciers can provide a valuable record of past variations of the Indian southwest monsoon.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.titleSoluble ionic and oxygen isotopic compositions of a shallow firn profile, Baishui glacier no. 1, southeastern Tibetan Plateauen_US
dc.typeConference_Paperen_US
dc.identifier.emailZhang, DD:zhangd@hkucc.hku.hken_US
dc.identifier.authorityZhang, DD=rp00649en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.3189/172756407782871648en_US
dc.identifier.scopuseid_2-s2.0-55349102380en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-55349102380&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume46en_US
dc.identifier.spage325en_US
dc.identifier.epage330en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridPang, H=7102237529en_US
dc.identifier.scopusauthoridHe, Y=7404942217en_US
dc.identifier.scopusauthoridTheakstone, WH=7003836274en_US
dc.identifier.scopusauthoridZhang, DD=9732911600en_US

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