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Measurements of meteor smoke particles during the ECOMA-2006 campaign. 2: Results
Leibniz-Institute of Atmospheric Physics.
Leibniz-Institute of Atmospheric Physics.
Leibniz-Institute of Atmospheric Physics.
Leibniz-Institute of Atmospheric Physics.
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2009 (English)In: Journal of Atmospheric and Solar-Terrestrial Physics, ISSN 1364-6826, E-ISSN 1879-1824, Vol. 71, no 3-4, 486-496 p.Article in journal (Refereed) Published
Abstract [en]

The first sounding rocket of the European ECOMA-project (ECOMA, Existence and Charge state Of Meteoric smoke particles in the middle Atmosphere) was launched on 8 September 2006. Measurements with a new particle detector described in the companion paper by Rapp and Strelnikova [2008. Measurements of meteor smoke particles during the ECOMA-2006 campaign: 1. Particle detection by active photoionization. Journal of Atmospheric and Solar-Terrestrial Physics, this issue, doi:10.1016/j.jastp.2008.06.002] clearly showed meteor smoke particle (MSP) signatures in both data channels. The data channels measure particles directly impacting on the detector electrode and photoelectrons from the particles actively created using ionization by the UV-photons of a xenon-flashlamp. Measured photoelectron currents resemble model expectations of the shape of the MSP layer almost perfectly, whereas derived number densities in the altitude range 60–90 km are larger than model results by about a factor of 5. Given the large uncertainties inherent to both model and the analysis of our measurements (e.g., the composition of the particles is not known and must be assumed) we consider this a satisfactory agreement and proof that MSPs do extend throughout the entire mesosphere as predicted by models. The measurements of direct particle impacts revealed a confined layer of negative charge between 80 and 90 km. This limited altitude range, however, is quantitatively shown to be the consequence of the aerodynamics of the rocket flight and does not have any geophysical origin. Measured charge signatures are consistent with expectations of particle charging given our own measurements of the background ionization. Unfortunately, however, a contamination of these measurements from triboelectric charging cannot be excluded at this stage

Place, publisher, year, edition, pages
2009. Vol. 71, no 3-4, 486-496 p.
Keyword [en]
Meteor smoke particles, In situ measurements
National Category
Meteorology and Atmospheric Sciences
Research subject
Atmospheric Sciences
Identifiers
URN: urn:nbn:se:su:diva-35762DOI: 10.1016/j.jastp.2008.07.011ISI: 000265231700021OAI: oai:DiVA.org:su-35762DiVA: diva2:287976
Available from: 2010-01-20 Created: 2010-01-20 Last updated: 2017-12-12Bibliographically approved

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