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A method for continuous 239Pu determinations in Arctic and Antarctic ice cores

Citation

Arienzo, MM and McConnell, JR and Chellman, N and Criscitiello, AS and Curran, M and Fritzsche, D and Kipfstuhl, S and Mulvaney, R and Nolan, M and Opel, T and Sigl, M and Steffensen, JP, A method for continuous 239Pu determinations in Arctic and Antarctic ice cores, Environmental Science and Technology, 50, (13) pp. 7066-7073. ISSN 0013-936X (2016) [Refereed Article]

Copyright Statement

© 2016 American Chemical Society

DOI: doi:10.1021/acs.est.6b01108

Abstract

Atmospheric nuclear weapons testing (NWT) resulted in the injection of plutonium (Pu) into the atmosphere and subsequent global deposition. We present a new method for continuous semiquantitative measurement of 239Pu in ice cores, which was used to develop annual records of fallout from NWT in ten ice cores from Greenland and Antarctica. The 239Pu was measured directly using an inductively coupled plasma–sector field mass spectrometer, thereby reducing analysis time and increasing depth-resolution with respect to previous methods. To validate this method, we compared our one year averaged results to published 239Pu records and other records of NWT. The 239Pu profiles from the Arctic ice cores reflected global trends in NWT and were in agreement with discrete Pu profiles from lower latitude ice cores. The 239Pu measurements in the Antarctic ice cores tracked low latitude NWT, consistent with previously published discrete records from Antarctica. Advantages of the continuous 239Pu measurement method are (1) reduced sample preparation and analysis time; (2) no requirement for additional ice samples for NWT fallout determinations; (3) measurements are exactly coregistered with all other chemical, elemental, isotopic, and gas measurements from the continuous analytical system; and (4) the long half-life means the 239Pu record is stable through time.

Item Details

Item Type:Refereed Article
Keywords:239Pu, ice cores, Arctic, Antarctic, plutonium
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Isotope Geochemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Curran, M (Dr Mark Curran)
ID Code:114873
Year Published:2016
Web of Science® Times Cited:7
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2017-03-01
Last Modified:2017-11-03
Downloads:0

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