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Variability of Be-10 and delta O-18 in snow pits from Greenland and a surface traverse from Antarctica
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2013 (Engelska)Ingår i: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, ISSN 0168-583X, E-ISSN 1872-9584, Vol. 294, s. 568-572Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

To examine temporal variability of Be-10 in glacial ice, we sampled snow to a depth of 160 cm at the NEEM (North Greenland Eemian Ice Drilling) drilling site in Greenland. The samples span three years between the summers of 2006 and 2009. At the same time, spatial variability of Be-10 in glacial ice was explored through collection of the upper similar to 5 cm of surface snow in Antarctica during part of the Swedish-Japanese traverse from Svea to Syowa station during the austral summer in 2007-2008. The results of the Greenlandic 1 Be snow suggested variable concentrations that apparently do not clearly reflect the seasonal change as indicated by the delta O-18 data. The Be-10 concentration variability most likely reflects also effects of aerosol loading and deposition pathways, possibly in combination with post-depositional processes. The Antarctic traverse data expose a negative correlation between Be-10 and delta O-18, while there are weaker but still significant correlations to altitude and distance to the coast (approximated by the distance to the 70th latitude). These relationships indicate that geographical factors, mainly the proximity to the coast, may strongly affect 1 Be concentrations in snow in Queen Maud Land, Antarctica. (C) 2012 Elsevier B.V. All rights reserved.

Ort, förlag, år, upplaga, sidor
2013. Vol. 294, s. 568-572
Nyckelord [en]
Beryllium-10; Greenland; Snow pit; Neem; Jase
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:polar:diva-2999DOI: 10.1016/j.nimb.2012.05.041OAI: oai:DiVA.org:polar-2999DiVA, id: diva2:1046039
Anmärkning

12th International Conference on Accelerator Mass Spectrometry (AMS), GNS Sci, Wellington, NEW ZEALAND, MAR 20-25, 2011

Tillgänglig från: 2016-11-11 Skapad: 2016-10-27 Senast uppdaterad: 2017-11-29

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Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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