Journal article

Aerosols that form subvisible cirrus at the tropical tropopause

Froyd K, Murphy D, Lawson P, Baumgardner D, Herman R ...see all

Atmospheric Chemistry and Physics, vol. 10, issue 1 (2010) pp. 209-218

  • 44


    Mendeley users who have this article in their library.
  • 65


    Citations of this article.
Sign in to save reference


The composition of residual particles from evaporated cirrus ice crystals near the tropical tropopause as well as unfrozen aerosols were measured with a single particle mass spectrometer. Subvisible cirrus residuals were predominantly composed of internal mixtures of neutralized sulfate with organic material and were chemically indistinguishable from unfrozen sulfate-organic aerosols. Ice residuals were also similar in size to unfrozen aerosol. Heterogeneous ice nuclei such as mineral dust were not enhanced in these subvisible cirrus residuals. Biomass burning particles were depleted in the residuals. Cloud probe measurements showing low cirrus ice crystal number concentrations were inconsistent with conventional homogeneous freezing. Recent laboratory studies provide heterogeneous nucleation scenarios that may explain tropopause level subvisible cirrus formation.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • K. D. Froyd

  • D. M. Murphy

  • P. Lawson

  • D. Baumgardner

  • R. L. Herman

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free