Universität zu Köln

Vakkari, Ville, Manninen, Antti J., O'Connor, Ewan J., Schween, Jan H., van Zyl, Pieter G. and Marinou, Eleni (2019). A novel post-processing algorithm for Halo Doppler lidars. Atmos. Meas. Tech., 12 (2). S. 839 - 853. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1867-8548

Full text not available from this repository.

Abstract

Commercially available Doppler lidars have now been proven to be efficient tools for studying winds and turbulence in the planetary boundary layer. However, in many cases low signal-to-noise ratio is still a limiting factor for utilising measurements by these devices. Here, we present a novel post-processing algorithm for Halo Stream Line Doppler lidars, which enables an improvement in sensitivity of a factor of 5 or more. This algorithm is based on improving the accuracy of the instrumental noise floor and it enables longer integration times or averaging of high temporal resolution data to be used to obtain signals down to -32 dB. While this algorithm does not affect the measured radial velocity, it improves the accuracy of radial velocity uncertainty estimates and consequently the accuracy of retrieved turbulent properties. Field measurements using three different Halo Doppler lidars deployed in Finland, Greece and South Africa demonstrate how the new post-processing algorithm increases data availability for turbulent retrievals in the planetary boundary layer, improves detection of high-altitude cirrus clouds and enables the observation of elevated aerosol layers.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Vakkari, Ville UNSPECIFIED UNSPECIFIED UNSPECIFIED Manninen, Antti J. UNSPECIFIED UNSPECIFIED UNSPECIFIED O'Connor, Ewan J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schween, Jan H. UNSPECIFIED UNSPECIFIED UNSPECIFIED van Zyl, Pieter G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marinou, Eleni UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-156833
DOI:	10.5194/amt-12-839-2019
Journal or Publication Title:	Atmos. Meas. Tech.
Volume:	12
Number:	2
Page Range:	S. 839 - 853
Date:	2019
Publisher:	COPERNICUS GESELLSCHAFT MBH
Place of Publication:	GOTTINGEN
ISSN:	1867-8548
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MIXING-LAYER HEIGHT; BOUNDARY-LAYER; RAMAN-POLARIZATION; WIND; FINLAND; CLOUD Multiple languages Meteorology & Atmospheric Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15683