A generalised background correction algorithm for a Halo Doppler lidar and its application to data from Finland

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dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor.author Manninen, Antti J.
dc.contributor.author O'Connor, Ewan J.
dc.contributor.author Vakkari, Ville
dc.contributor.author Petäjä, Tuukka
dc.date.accessioned 2016-05-27T09:18:02Z
dc.date.available 2016-05-27T09:18:02Z
dc.date.issued 2016
dc.identifier.citation Manninen , A J , O'Connor , E J , Vakkari , V & Petäjä , T 2016 , ' A generalised background correction algorithm for a Halo Doppler lidar and its application to data from Finland ' , Atmospheric Measurement Techniques , vol. 9 , no. 2 , pp. 817-827 . https://doi.org/10.5194/amt-9-817-2016 en
dc.identifier.issn 1867-1381
dc.identifier.other PURE: 64061985
dc.identifier.other PURE UUID: 58c055dc-288f-4e34-8c0a-89095d218782
dc.identifier.other WOS: 000375612000031
dc.identifier.other Scopus: 84960128122
dc.identifier.other ORCID: /0000-0003-3437-9189/work/29770878
dc.identifier.uri http://hdl.handle.net/10138/162998
dc.description.abstract Current commercially available Doppler lidars provide an economical and robust solution for measuring vertical and horizontal wind velocities, together with the ability to provide co- and cross-polarised backscatter profiles. The high temporal resolution of these instruments allows turbulent properties to be obtained from studying the variation in radial velocities. However, the instrument specifications mean that certain characteristics, especially the background noise behaviour, become a limiting factor for the instrument sensitivity in regions where the aerosol load is low. Turbulent calculations require an accurate estimate of the contribution from velocity uncertainty estimates, which are directly related to the signal-to-noise ratio. Any bias in the signal-to-noise ratio will propagate through as a bias in turbulent properties. In this paper we present a method to correct for artefacts in the background noise behaviour of commercially available Doppler lidars and reduce the signal-to-noise ratio threshold used to discriminate between noise, and cloud or aerosol signals. We show that, for Doppler lidars operating continuously at a number of locations in Finland, the data availability can be increased by as much as 50% after performing this background correction and subsequent reduction in the threshold. The reduction in bias also greatly improves subsequent calculations of turbulent properties in weak signal regimes. en
dc.format.extent 11
dc.language.iso eng
dc.relation.ispartof Atmospheric Measurement Techniques
dc.rights en
dc.subject AEROSOL DECADAL TRENDS en
dc.subject PRECIPITATION en
dc.subject REGRESSION en
dc.subject STATIONS en
dc.subject HEIGHT en
dc.subject WIND en
dc.subject GAW en
dc.subject 114 Physical sciences en
dc.title A generalised background correction algorithm for a Halo Doppler lidar and its application to data from Finland en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.5194/amt-9-817-2016
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
dc.contributor.pbl
dc.contributor.pbl

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