Isotopic equilibration between dissolved and suspended particulate lead in the Atlantic Ocean: evidence from 210Pb and stable Pb isotopes

R. M. Sherrell, E. A. Boyle, B. Hamelin

Research output: Contribution to journalArticlepeer-review

70 Scopus citations

Abstract

Decreased consumption of leaded gasoline in the United States over the past two decades has drastically altered the flux and isotopic composition of Pb entering the western North Atlantic from the atmosphere. Here we exploit the resulting temporal changes in the distribution and isotopic composition of oceanic Pb to investigate interactions between dissolved and particulate Pb in the ocean water column. A simple flux model suggests that the effect of deep ocean scavenging processes on the flux and isotopic composition of Pb sinking on large particles was minor throughout the preanthropogenic and most of the anthropogenic era but has become important as surface inputs decrease to pre-leaded gasoline levels and may exceed the contribution of surface-derived Pb flux in the next decade. -from Authors

Original languageEnglish (US)
Pages (from-to)11,257-11,268
JournalJournal of Geophysical Research
Volume97
Issue numberC7
DOIs
StatePublished - 1992

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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