Oxygen isotopic and soluble ionic composition of a shallow firn core, Inilchek glacier, central Tien Shan
Journal of Glaciology, ISSN: 0022-1430, Vol: 47, Issue: 159, Page: 548-554
2001
- 44Citations
- 358Usage
- 40Captures
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Metrics Details
- Citations44
- Citation Indexes44
- CrossRef44
- 39
- Usage358
- Downloads346
- Abstract Views12
- Captures40
- Readers40
- 40
Article Description
Oxygen isotopic and soluble ionic measurements made on snow-pit (2 m depth) and firn-core (12.4 m depth) samples recovered from the accumulation zone (5100 m) of Inilchek glacier (43° N, 79° E) provide information on recent (1992-98) climatic and environmental conditions in the central Tien Shan region of central Asia. The combined 14.4 m snow-pit/firn-core profile lies within the firn zone, and contains only one observed melt feature (10 m temperature = -12°C). Although some post-depositional attenuation of the sub-seasonal δO record is possible annual cycles are apparent throughout the isotope profile. We therefore use the preserved δO record to establish a depth/age scale for the core. Mean δO values for the entire core and for summer periods are consistent with δO/temperature observations, and suggest the δO record provides a means to reconstruct past changes in summer surface temperature at the site. Major-ion (Na, K, Mg, Ca, NH, Cl, NO, SO) data from the core demonstrate the dominant influence of dust deposition on the soluble chemistry at the site, and indicate significant interannual variability in atmospheric-dust loading during the 1990s. Anthropogenic impacts on NH concentrations are observed at the site, and suggest a summer increase in atmospheric NH that may be related to regional agricultural (nitrogen-rich fertilizer use) activities.
Bibliographic Details
https://digitalcommons.library.umaine.edu/ers_facpub/65; https://scholars.unh.edu/earthsci_facpub/518
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0035739699&origin=inward; http://dx.doi.org/10.3189/172756501781831819; https://www.cambridge.org/core/product/identifier/S0022143000212410/type/journal_article; https://digitalcommons.library.umaine.edu/ers_facpub/65; https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1064&context=ers_facpub; https://scholars.unh.edu/earthsci_facpub/518; https://scholars.unh.edu/cgi/viewcontent.cgi?article=1517&context=earthsci_facpub; https://dx.doi.org/10.3189/172756501781831819; https://www.cambridge.org/core/journals/journal-of-glaciology/article/oxygen-isotopic-and-soluble-ionic-composition-of-a-shallow-firn-core-inilchek-glacier-central-tien-shan/09BCE153C3E823DCB54F28C8B59AB300
International Glaciological Society
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