Skip to main content
eScholarship
Open Access Publications from the University of California

Antarctic-wide array of high-resolution ice core records reveals pervasive lead pollution began in 1889 and persists today.

  • Author(s): McConnell, JR
  • Maselli, OJ
  • Sigl, M
  • Vallelonga, P
  • Neumann, T
  • Anschütz, H
  • Bales, RC
  • Curran, MAJ
  • Das, SB
  • Edwards, R
  • Kipfstuhl, S
  • Layman, L
  • Thomas, ER
  • et al.

Published Web Location

http://www.nature.com/articles/srep05848
No data is associated with this publication.
Abstract

Interior Antarctica is among the most remote places on Earth and was thought to be beyond the reach of human impacts when Amundsen and Scott raced to the South Pole in 1911. Here we show detailed measurements from an extensive array of 16 ice cores quantifying substantial toxic heavy metal lead pollution at South Pole and throughout Antarctica by 1889 - beating polar explorers by more than 22 years. Unlike the Arctic where lead pollution peaked in the 1970s, lead pollution in Antarctica was as high in the early 20(th) century as at any time since industrialization. The similar timing and magnitude of changes in lead deposition across Antarctica, as well as the characteristic isotopic signature of Broken Hill lead found throughout the continent, suggest that this single emission source in southern Australia was responsible for the introduction of lead pollution into Antarctica at the end of the 19(th) century and remains a significant source today. An estimated 660 t of industrial lead have been deposited over Antarctica during the past 130 years as a result of mid-latitude industrial emissions, with regional-to-global scale circulation likely modulating aerosol concentrations. Despite abatement efforts, significant lead pollution in Antarctica persists into the 21(st) century.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Item not freely available? Link broken?
Report a problem accessing this item