elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Meteor smoke influences on the D-region charge balance - review of recent in situ measurements and one dimensional model results

Baumann, Carsten and Rapp, Markus and Kero, A. and Ennell, C.-F. (2013) Meteor smoke influences on the D-region charge balance - review of recent in situ measurements and one dimensional model results. Annales Geophysicae, 31, pp. 2049-2062. Copernicus Publications. DOI: 10.5194/angeo-31-2049-2013 ISSN 0992-7689

[img]
Preview
PDF
371kB

Official URL: http://www.ann-geophys.net/31/2049/2013/angeo-31-2049-2013.pdf

Abstract

This work investigates the influence of meteoric smoke particles (MSP) on the charge balance in the D-region ionosphere. Both experimental in situ measurements and a one-dimensional ionospheric model reveal a clear impact of MSP on the ionospheric composition of the D-region. The study reviews rocket-borne in situ measurements of electron and positive ion density, which show a distinct deficit of electrons in comparison to positive ions between 80 and 95 km. This deficit can be explained by the ambient negatively chargedMSP measured simultaneously with a Faraday cup. The influence of MSP on the D-region charge balance is addressed with a simplified ionospheric model with only six components, i.e. electrons, positive and negative ions and neutral and charged MSP (both signs). The scheme includes reactions of plasma captured by MSP and MSP photo reactions as well as the standard ionospheric processes, e.g. ionion recombination. The model shows that the capture of plasma constituents by MSP is an important process leading to scavenging of electrons. Since Faraday cup measurements are biased towards heavy MSP because of aerodynamical filtering, we have applied an estimate of this filter on the modelled MSP densities. By doing that, we find good qualitative agreement between the experimental data and our model results. In addition, the model study reveals an increase of positive ions in the presence of MSP. That is primarily caused by the reduced dissociative recombination with electrons which have been removed from the gas phase by the MSP.

Item URL in elib:https://elib.dlr.de/85372/
Document Type:Article
Title:Meteor smoke influences on the D-region charge balance - review of recent in situ measurements and one dimensional model results
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Baumann, CarstenDLR, IPAUNSPECIFIED
Rapp, MarkusDLR, IPAUNSPECIFIED
Kero, A.Sodankylä Geophysical Observatory, University of Oulu, Sodankylä, FinlandUNSPECIFIED
Ennell, C.-F.Sodankylä Geophysical Observatory, University of Oulu, Sodankylä, FinlandUNSPECIFIED
Date:2013
Journal or Publication Title:Annales Geophysicae
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:31
DOI :10.5194/angeo-31-2049-2013
Page Range:pp. 2049-2062
Publisher:Copernicus Publications
ISSN:0992-7689
Status:Published
Keywords:Atmospheric composition and structure, aerosols and particles, middle atmosphere
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Ziegele, Brigitte
Deposited On:19 Nov 2013 12:44
Last Modified:08 Mar 2018 18:47

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.