Resolving global versus local/regional Pu sources in the environment using sector ICP-MS

Ketterer, Michael E.; Hafer, Kevin M.; Link, Carolyn L.; Kolwaite, Douglas; Wilson, Jennifer T.; Mietelski, Jerzy W.

doi:10.1039/b302903d

Cited by 69 publications

(47 citation statements)

References 22 publications

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“…Dried aliquots (0.5 g) of the top 8 cm of the surface core 06BRDS2 (0.5 cm increments, n ¼ 16) were analysed at Northern Arizona University for 239þ240 Pu concentrations using inductively coupled plasma mass spectrometry (ICP-MS) following the Ketterer et al (2004). Dried aliquots (2-3 g) of surface core 06PL4-S5 ($2 cm increments, n ¼ 12) were analysed for 137 Cs using thermal ionisation mass spectrometry (TIMS) following the methods of Chen et al (2008).…”

Section: Geochronologymentioning

confidence: 99%

Holocene alpine glaciation inferred from lacustrine sediments on northeastern Baffin Island, Arctic Canada

Thomas

Szymanski

Briner

2010

J Quaternary Science

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With accelerated melting of alpine glaciers, understanding the future state of the cryosphere is critical. Because the observational record of glacier response to climate change is short, palaeo-records of glacier change are needed. Using proglacial lake sediments, which contain continuous and datable records of past glacier activity, we investigate Holocene glacier fluctuations on northeastern Baffin Island. Basal radiocarbon ages from three lakes constrain Laurentide Ice Sheet retreat by ca. 10.5 ka. High sedimentation rates (0.03 cm a À1 ) and continuous minerogenic sedimentation throughout the Holocene in proglacial lakes, in contrast to organic-rich sediments and low sedimentation rates (0.005 cm a À1 ) in neighbouring non-glacial lakes, suggest that glaciers may have persisted in proglacial lake catchments since regional deglaciation. The presence of varves and relatively high magnetic susceptibility from 10 to 6 ka and since 2 ka in one proglacial lake suggest minimum Holocene glacier extent ca. 6-2 ka. Moraine evidence and proglacial and threshold lake sediments indicate that the maximum Holocene glacier extent occurred during the Little Ice Age. The finding that glaciers likely persisted through the Holocene is surprising, given that regional proxy records reveal summer temperatures several degrees warmer than today, and may be due to shorter ablation seasons and greater accumulation-season precipitation.

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Section: Geochronologymentioning

confidence: 99%

Holocene alpine glaciation inferred from lacustrine sediments on northeastern Baffin Island, Arctic Canada

Thomas

Szymanski

Briner

2010

J Quaternary Science

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“…A significant decrease of this ratio would have supported the hypothesis that some of the plutonium arises from other sources, e.g. burnt nuclear fuel (Ketterer et al, 2004a), while a significant impact of the Chernobyl accident would have increased it up to 0.35 (Ketterer et al, 2004b).…”

Section: Plutonium In Milk Teethmentioning

confidence: 85%

Long-Term Effects of Exposure to Low-Levels of Radioactivity: a Retrospective Study of 239Pu and 90Sr from Nuclear Bomb Tests on the Swiss Population

Froidevaux¹,

Haldimann²,

Bochud³

2011

Nuclear Power - Operation, Safety and Environment

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“…Dried aliquots (0.5 g) of the top 32 cm of core 09AYR2 were analyzed for 239?240 Pu concentrations at the Northern Arizona University Department of Chemistry using ICP-MS analysis following the methods of Ketterer et al (2004b). Sediments were analyzed at 2 cm intervals from 0 to 10 cm, 1 cm intervals from 10 to 15 cm, 0.5 cm intervals from 15 to 21 cm, 1 cm intervals from 21 to 22 cm, and 2 cm intervals from 22 to 32 cm (n = 28).…”

Section: Plutonium Datingmentioning

confidence: 99%

Leaf wax δ2H and varve-thickness climate proxies from proglacial lake sediments, Baffin Island, Arctic Canada

et al. 2012

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We present a multiproxy paleoclimate record using leaf wax hydrogen isotopes (d 2 H wax ) and varve thickness from Arctic proglacial lake sediments. We also provide one of the first evaluations of the utility of d 2 H wax as a paleoclimate proxy in Arctic proglacial lakes. We compare varve thickness and d 2 H wax at sub-decadal resolution from 1948 to 2004 AD, and at sub-centennial resolution from 1450 to 2004 AD. Varve thickness and d 2 H wax both contain large interannual variability and are anti-correlated during the late twentieth century, suggesting that both proxies respond rapidly, but by different mechanisms, to catchment-scale forcings. At longer time scales, varve thickness exhibits a strong response to Little Ice Age cooling (1661-1827 AD in this record) but does not show evidence for twentieth century warming recorded throughout the Arctic. d 2 H wax does record regional-scale temperature changes, with more 2 Hdepleted values during the Little Ice Age and an abrupt change to more 2 H-enriched values in the twentieth century. This corresponds well with a recent Arcticwide temperature reconstruction in which the seventeenth century is the coldest interval, and the twentieth century is the warmest interval. Our results suggest that d 2 H wax is a promising proxy that can be applied at high resolution in proglacial Arctic lakes.

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Resolving global versus local/regional Pu sources in the environment using sector ICP-MS

Cited by 69 publications

References 22 publications

Holocene alpine glaciation inferred from lacustrine sediments on northeastern Baffin Island, Arctic Canada

Holocene alpine glaciation inferred from lacustrine sediments on northeastern Baffin Island, Arctic Canada

Long-Term Effects of Exposure to Low-Levels of Radioactivity: a Retrospective Study of 239Pu and 90Sr from Nuclear Bomb Tests on the Swiss Population

Leaf wax δ2H and varve-thickness climate proxies from proglacial lake sediments, Baffin Island, Arctic Canada

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