NDLI: Evaluation of the Interpretation of Ceilometer Data with RASS and Radiosonde Data

Content Provider	Springer Nature Link
Author	Emeis, Stefan Schäfer, Klaus Münkel, Christoph Friedl, Roman Suppan, Peter
Copyright Year	2011
Abstract	Since 2006 different remote monitoring methods for determining mixing-layer height have been operated in parallel in Augsburg (Germany). One method is based on the operation of eye-safe commercial mini-lidar systems (ceilometers). The optical backscatter intensities recorded with ceilometers provide information about the range-dependent aerosol concentration; gradient minima within this profile mark the tops of mixed layers. Special software for these ceilometers provides routine retrievals of lower atmospheric layering. A second method, based on sodar observations, detects the height of a turbulent layer characterized by high acoustic backscatter intensities due to thermal fluctuations and a high variance of the vertical velocity component. This information is extended by measurements with a radio-acoustic sounding system (RASS) that directly provides the vertical temperature profile from the detection of acoustic signal propagation and thus temperature inversions that mark atmospheric layers. Ceilometer backscatter information is evaluated by comparison with parallel measurements. Data are presented from 2 years of combined ceilometer and RASS measurements at the same site and from comparison with a nearby (60 km) radiosonde for larger-scale humidity information. This evaluation is designed to ensure mixing-layer height monitoring from ceilometer data more reliable.
Starting Page	25
Ending Page	35
Page Count	11
File Format	PDF
ISSN	00068314
Journal	Boundary-Layer Meteorology
Volume Number	143
Issue Number	1
e-ISSN	15731472
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-04-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Air pollution Ceilometer Lidar Mixing-layer height Radio-acoustic sounding system Sodar Meteorology/Climatology Atmospheric Protection/Air Quality Control/Air Pollution
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science

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