Bigot et al 2016_Cryospher_OCPs_LawDome_tc-10-2533-2016.pdf (1.58 MB)
Brief communication: organochlorine pesticides in an archived firn core from Law Dome, East Antarctica
journal contribution
posted on 2023-05-18, 23:37 authored by Bigot, M, Mark Curran, Andrew MoyAndrew Moy, Muir, DCG, Hawker, DW, Cropp, R, Teixeira, CF, Bengtson Nash, SMOrganochlorine pesticides (OCPs) were, for the first time, quantified in archived firn cores from East Antarctica representative of 1945–1957 and 1958–1967 (current era, C.E.). The core sections were melted under high-purity nitrogen atmosphere, and the meltwater was analysed. Methods allowed quantification of hexachlorocyclohexanes, heptachlor, trans-chlordane, dieldrin and endrin. While the core presented evidence of nominal contamination by modern-use chemicals, indicating handling and/or storage contamination, legacy OCP concentrations and deposition rates reported are orders of magnitude lower than those from Arctic regions, lending support for their validity. The study further provides a description of equipment used and suggests methods to overcome logistical challenges associated with trace organic contaminant detection in polar regions.
History
Publication title
CryosphereVolume
10Pagination
2533-2539ISSN
1994-0416Department/School
Institute for Marine and Antarctic StudiesPublisher
Copernicus GmbHPlace of publication
GermanyRights statement
Copyright 2016 The Authors Licensed under Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcodeRepository Status
- Open