On small particles in the Arctic summer boundary layer: observations at two different heights near Ny-Ålesund, Svalbard

Johan Ström; Ann-Christine Engvall; Frank Delbart; Radovan Krejci; Renate Treffeisen

doi:10.1111/j.1600-0889.2009.00412.x

On small particles in the Arctic summer boundary layer: observations at two different heights near Ny-Ålesund, Svalbard

Tellus B: Chemical and Physical Meteorology

Volume 61 (2009): Issue 2

By: Johan Ström, Ann-Christine Engvall, Frank Delbart, Radovan Krejci and Renate Treffeisen

Open Access

|Jan 2009

Abstract

Concurrent observations of particle number densities and size distributions observed at two different heights (near ocean level and 475 m above sea level) in Ny-Ålesund, Svalbard were studied with respect to the diurnal variation during a summer period in June 2004. The results show that observed variation in particle number density in the Arctic boundary layer may be strongly modulated by vertical mixing and dilution. The particles appeared to be formed in the early morning when solar intensity reached about 30% of the mid-day intensity. Based on differences in the observed number densities at the two heights it appears as if particles are formed in the lower part of the boundary layer. The formation rate of 10 nm diameter particles is estimated to be 0.11 cm⁻³ s⁻¹ and the growth rate is in a range between 1 and 2 nm h⁻¹.

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Articles in this issue

DOI: https://doi.org/10.1111/j.1600-0889.2009.00412.x | Journal eISSN: 1600-0889

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Language: English

Page range: 473 - 482

Submitted on: May 15, 2008

Accepted on: Nov 14, 2008

Published on: Jan 1, 2009

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 2009 Johan Ström, Ann-Christine Engvall, Frank Delbart, Radovan Krejci, Renate Treffeisen, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 61 (2009): Issue 2