Dissolved input of manganese to the ocean: aerosol source

C. Guieu, R. Duce, R. Arimoto

Research output: Contribution to journalArticle

Abstract

Aerosol particle samples representative of polluted air, dust-laden air, and clean marine air were collected, and exposed to seawater for varying lengths of time and to deionized (Milli-Q) water at various values of pH. The percentage of aerosol Mn dissolved in Milli-Q water increased from 55 to 80% between pH 8 and pH 2 for pollution aerosols. With the mineral aerosol particles, the dissolved Mn increased from 25 to 50% between pH 8 and pH 2. We conclude that the dissolution process for aerosol particles from a remote marine area, is controlled by the background mineral content. The kinetics of Mn dissolution in seawater are rapid for all the samples: a concentration plateau is reached after 10 min or less of exposure. Release of dissolved Mn from polluted aerosols in seawater was approximately twice the value obtained with mineral particles (55 and 30%, respectively). The total dissolved Mn flux from anthropogenic sources in western North Europe is estimated to be 0.3 μmol m-2d-1. -from Authors

Original languageEnglish (US)
Pages (from-to)18,789-18,800
JournalJournal of Geophysical Research
Volume99
Issue numberD9
DOIs
StatePublished - 1994

ASJC Scopus subject areas

  • 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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