Soot and sulfate aerosol particles in the remote marine troposphere

Mihály Pósfai, James R. Anderson, P R Buseck, Herman Sievering

Research output: Contribution to journalArticle

180 Scopus citations

Abstract

Sulfate aerosol particles containing soot aggregates were observed in the marine troposphere in both hemispheres under conditions that ranged from extremely clean to heavily polluted. Even in clean air above the remote Southern Ocean during the First Aerosol Characterization Experiment (ACE 1), depending on the sample, between 10 and 45% of sulfate particles contained soot inclusions. We identified aircraft emissions and biomass burning as the most likely major sources of soot. Internally mixed soot and sulfate appear to comprise a globally significant fraction of aerosols in the troposphere. Anthropogenic combustion aerosols can thus potentially change the radiative climate effects of sulfate aerosols and may have an impact on cloud properties even in the remote troposphere.

Original languageEnglish (US)
Article number1999JD900208
Pages (from-to)21685-21693
Number of pages9
JournalJournal of Geophysical Research Atmospheres
Volume104
Issue numberD17
DOIs
StatePublished - Sep 20 1999

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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