Seasonal variations of glaciochemical, isotopic and stratigraphic properties in Siple Dome (Antarctica) surface snow

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dc.contributor.authorKreutz, K. J.
dc.contributor.authorMayewski, P. A.
dc.contributor.authorTwickler, M. S.
dc.contributor.authorWhitlow, S. I.
dc.contributor.authorWhite, J. W. C.
dc.contributor.authorShuman, Christopher
dc.contributor.authorRaymond, C. F.
dc.contributor.authorConway, H.
dc.contributor.authorMcConnell, J. R.
dc.date.accessioned2022-02-21T16:10:28Z
dc.date.available2022-02-21T16:10:28Z
dc.date.issued2017-09-14
dc.description.abstractSix snow-pit records recovered from Siple Dome, West Antarctica, during 1994 are used to study seasonal variations in chemical (major ion and H₂₀₂), isotopic (deuterium) and physical stratigraphic properties during the 1988-94 period. Comparison of δD measurements and satellite-derived brightness temperature for the Siple Dome area suggests that most seasonal SD maxima occur within ±4 weeks of each 1 January. Several other chemical species (H₂₀₂, non-sea-salt (nss) SO₄²⁻, methanesulfonic acid and NO₃⁻) show coeval peaks with SD, together providing an accurate method for identifying summer accumulation. Sea-salt-derived species generally peak during winter/spring, but episodic input is noted throughout some years. No reliable seasonal signal is identified in species with continental sources (nssCa²⁺ nss Mg²⁺), NH₄⁺ or nssCl⁻. Visible strata such as large depth-hoar layers (>5 cm) are associated with summer accumulation and its metamorphosis, but smaller hoar layers and crusts are more difficult to interpret. A multi-parameter approach is found to provide the most accurate dating of these snow-pit records, and is used to determine annual layer thicknesses at each site Significant spatial accumulation variability exists on an annual basis, but mean accumulation in the sampled 10 km² grid for the 1988-94 period is fairly uniform.en_US
dc.description.sponsorshipWe thank colleagues in the field (QYang, A. Gades, R. Jacobel and T. Scambos), the Siple Dome Science Coordination Office (Desert Research Institute, University of Nevada), the Polar Ice Coring Office (University of Nebraska, Lincoln), Antarctic Support Associates, Navy Squadron VXE-6 and the 109th Air National Guard. S. Johnsen and K. Goto-Azuma made helpful comments on the manuscript. Financial support for this project was provided by the U. S. National Science Foundation Office of Polar Programs (OPP 9316564 (UNH),OPP 9420648 (UW)).en_US
dc.description.urihttps://www.cambridge.org/core/journals/annals-of-glaciology/article/seasonal-variations-of-glaciochemical-isotopic-and-stratigraphic-properties-in-siple-dome-antarctica-surface-snow/51047D8F8F616459FF771445FD193D44en_US
dc.format.extent7 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2enfn-nvki
dc.identifier.citationKreutz, K. J., P. A. Mayewski, M. S. Twickler, S. I. Whitlow, J. W. C. White, C. A. Shuman, C. F. Raymond, H. Conway, and J. R. McConnell. 1999. “Seasonal Variations of Glaciochemical, Isotopic and Stratigraphic Properties in Siple Dome (Antarctica) Surface Snow.” Annals of Glaciology 29. Cambridge University Press: 38–44. doi:10.3189/172756499781821193.en_US
dc.identifier.urihttps://doi.org/10.3189/172756499781821193
dc.identifier.urihttp://hdl.handle.net/11603/24302
dc.language.isoen_USen_US
dc.publisherCambridge University Pressen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleSeasonal variations of glaciochemical, isotopic and stratigraphic properties in Siple Dome (Antarctica) surface snowen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0001-9606-767Xen_US

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