Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/53315
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dc.contributor.authorYounger, J.en
dc.contributor.authorReid, I.en
dc.contributor.authorVincent, R.en
dc.contributor.authorHoldsworth, D.en
dc.date.issued2008en
dc.identifier.citationGeophysical Research Letters, 2008; 35(15):015812 -01-015812-04en
dc.identifier.issn0094-8276en
dc.identifier.urihttp://hdl.handle.net/2440/53315-
dc.description.abstractMeasurements of the time taken for meteor radar echoes to decay can be used to estimate the ambipolar diffusion coefficient. If it is assumed that the decay of the radar echo is due strictly to the outward diffusion of ionized material in the meteor's trail, then echo decay is determined by temperature and pressure. However, dust particles or small ice crystals may absorb electrons from meteor trails, distorting their evolution and echo decay properties. A numerical method for modeling these processes is presented, with the prediction that absorbing aerosols can both decrease and increase the decay time of meteor radar echoes, depending on meteor, atmospheric, and radar parameters. This prediction is confirmed with observations taken using three 33 MHz and two 55 MHz radars at three locations in Australia and Antarctica, which display strong biases in the decay times of lower power echoes. It is suggested that both the accuracy and precision of atmospheric measurements are improved if only the highest power meteor echoes are used for estimates of the ambipolar diffusion coefficient.en
dc.description.statementofresponsibilityI. M. Reid, R. A. Vincent and D. A. Holdsworthen
dc.language.isoenen
dc.publisherAmer Geophysical Unionen
dc.subjectmeteor; radar; aerosolen
dc.titleModeling and observing the effect of aerosols on meteor radar measurements of the atmosphereen
dc.typeJournal articleen
dc.identifier.rmid0020082337en
dc.identifier.doi10.1029/2008GL033763en
dc.relation.granthttp://purl.org/au-research/grants/arc/DP0450787en
dc.identifier.pubid42218-
pubs.library.collectionChemistry and Physics publicationsen
pubs.verification-statusVerifieden
pubs.publication-statusPublisheden
dc.identifier.orcidYounger, J. [0000-0003-2918-1709]en
dc.identifier.orcidReid, I. [0000-0003-2340-9047]en
dc.identifier.orcidVincent, R. [0000-0001-6559-6544]en
Appears in Collections:Chemistry and Physics publications

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