Article

 

Deep convection as a source of new particles in the midlatitude upper troposhere Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/p8418t14g

Descriptions

Attribute NameValues
Creator
Abstract
  • A case study of new particle formation in the region downwind of a mesoscale convective system stretching across much of the central United States is presented. Airborne measurements were made of condensation nuclei (CN), cloud particle surface area, water vapor, and other gases. CN concentrations were greatly enhanced above and downwind of the cirrus anvil, with maximum concentrations of 45,000 per standard cm³. Volatility and electron microscope measurements indicated that most of the particles were likely to be small sulfate particles. The enhancement extended over at least a 600‐km region. Multivariate statistical analysis revealed that high CN concentrations were associated with surface tracers, as well as convective elements. Convection apparently brings gas‐phase particle precursors from the surface to the storm outflow region, where particle nucleation is favored by the extremely low temperatures. Simple calculations showed that deep convective systems may contribute to a substantial portion of the background aerosol in the upper troposphere at midlatitudes.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Twohy, C. H., Clement, C. F., Gandrud, B. W., Weinheimer, A. J., Campos, T., Baumgardner, D., Brune, W. H. Faloona, I., Tan, D., Sachse D. W. and Vay, S. A., 2002, Deep convection as a source of new particles in the mid-latitude upper troposphere: J. Geophys. Res., v. 107 p. 1-10.
Journal Title
Journal Volume
  • 107
Journal Issue/Number
  • D21
Academic Affiliation
Rights Statement
Publisher
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2010-04-21T16:21:08Z (GMT). No. of bitstreams: 1 Twohy et al JGR 2002.pdf: 520359 bytes, checksum: e7e1eaf37da408e417e1b05f1de97e1a (MD5) Previous issue date: 2002
  • description.provenance : Submitted by Mary Phan (mpscanner@gmail.com) on 2010-04-20T21:08:15Z No. of bitstreams: 1 Twohy et al JGR 2002.pdf: 520359 bytes, checksum: e7e1eaf37da408e417e1b05f1de97e1a (MD5)
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2010-04-21T16:21:08Z (GMT) No. of bitstreams: 1 Twohy et al JGR 2002.pdf: 520359 bytes, checksum: e7e1eaf37da408e417e1b05f1de97e1a (MD5)

Relationships

Parents:

This work has no parents.

Items