Journal cover Journal topic
Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 3.668
IF3.668
IF 5-year value: 3.707
IF 5-year
3.707
CiteScore value: 6.3
CiteScore
6.3
SNIP value: 1.383
SNIP1.383
IPP value: 3.75
IPP3.75
SJR value: 1.525
SJR1.525
Scimago H <br class='widget-line-break'>index value: 77
Scimago H
index
77
h5-index value: 49
h5-index49
Volume 7, issue 5
Atmos. Meas. Tech., 7, 1321–1330, 2014
https://doi.org/10.5194/amt-7-1321-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Meas. Tech., 7, 1321–1330, 2014
https://doi.org/10.5194/amt-7-1321-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 19 May 2014

Research article | 19 May 2014

An experiment to measure raindrop collection efficiencies: influence of rear capture

A. Quérel1,2,*, P. Lemaitre1, M. Monier2,3, E. Porcheron1, A. I. Flossmann2,3, and M. Hervo2,3 A. Quérel et al.
  • 1Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN-RES, SCA, LECEV, Gif-sur-Yvette, France
  • 2Clermont Université, Université Blaise Pascal, Laboratoire de Météorologie Physique, Clermont-Ferrand, France
  • 3CNRS, INSU, UMR6016, LaMP, Aubière, France
  • *now at: CEREA, Centre d'Enseignement et de Recherche en Environnement Atmosphérique, Joint Laboratory of Ecole des Ponts ParisTech/EDF R&D, Université Paris-Est, Marne-la-Vallée, France

Abstract. In the case of severe accident with loss of containment in a nuclear plant, radionuclides are released into the atmosphere in the form of both gases and aerosol particles (Baklanov and Sørensen, 2001). The analysis of radioactive aerosol scavenged by rain after the Chernobyl accident highlights certain differences between the modelling studies and the environmental measurements. Part of these discrepancies can probably be attributed to uncertainties in the efficiencies used to calculate aerosol particle collection by raindrops, particularly drops with a diameter larger than one millimetre. In order to address the issue of these uncertainties, an experimental study was performed to close the gaps still existing for this key microphysical parameter. In this paper, attention is first focused on the efficiency with which aerosol particles in the accumulation mode are collected by raindrops with a diameter of 2 mm. The collection efficiencies measured for aerosol particle in the sub-micron range are quantitatively consistent with previous theoretical model developed by Beard (1974) and thus highlight the major role of rear capture in the submicron range.

Publications Copernicus
Download
Citation