Journal article

On the potential contribution of open lead particle emissions to the central Arctic aerosol concentration

Held A, Brooks I, Leck C, Tjernström M ...see all

Atmospheric Chemistry and Physics, vol. 11, issue 7 (2011) pp. 3093-3105

  • 17

    Readers

    Mendeley users who have this article in their library.
  • 20

    Citations

    Citations of this article.
Sign in to save reference

Abstract

We present direct eddy covariance measurements of aerosol number fluxes,
dominated by sub-50 nm particles, at the edge of an ice floe drifting in
the central Arctic Ocean. The measurements were made during the
ice-breaker borne ASCOS (Arctic Summer Cloud Ocean Study) expedition in
August 2008 between 2 degrees-10 degrees W longitude and 87 degrees-87.5
degrees N latitude. The median aerosol transfer velocities over
different surface types (open water leads, ice ridges, snow and ice
surfaces) ranged from 0.27 to 0.68 mm s(-1) during deposition-dominated
episodes. Emission periods were observed more frequently over the open
lead, while the snow behaved primarily as a deposition surface. Directly
measured aerosol fluxes were compared with particle deposition
parameterizations in order to estimate the emission flux from the
observed net aerosol flux. Finally, the contribution of the open lead
particle source to atmospheric variations in particle number
concentration was evaluated and compared with the observed temporal
evolution of particle number. The direct emission of aerosol particles
from the open lead can explain only 5-10% of the observed particle
number variation in the mixing layer close to the surface.

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

Authors

  • A. Held

  • I. M. Brooks

  • C. Leck

  • M. Tjernström

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free