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Conference Paper: Lidar probing the urban nocturnal boundary layer

TitleLidar probing the urban nocturnal boundary layer
Authors
Issue Date1998
PublisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xml
Citation
Proceedings Of Spie - The International Society For Optical Engineering, 1998, v. 3504, p. 87-90 How to Cite?
AbstractLidar observations to study the nocturnal boundary layer in the atmosphere were made on selected evenings during December 1997 - March 1998 at the City University of Hong Kong (lat. 20°20′6 inches, long. 114°10′18 inches, at 57 m AMSL), Hong Kong. The ground-based Nd:YAG lidar has been operated to detect the vertical distribution of aerosols in the NBL at a subtropical urban site. It is shown that the vertical relative signal profiles can be employed to determine the heights of the single or multiple nocturnal inversions. In a clear sky and light wind evening transition period, the strong radiative cooling caused the air near the ground becomes stably stratified. The nocturnal inversion starts to emerge soon before sunset and grows vertically as the night progresses. The study also showed that the temporal evolution of the nocturnal inversion depth was rapidly increased soon after sunset and a slower rate in the midnight hours. The results of the study indicate that the vertical aerosol distribution in the multiple-layer is more complicated than that in the single-layer, of NBL. The early morning transition of the NBL is also discussed. A comparison of the lidar aerosol signals and radiosonde measurements was performed to evaluate the consistency of observations between the different systems.
Persistent Identifierhttp://hdl.handle.net/10722/159102
ISSN

 

DC FieldValueLanguage
dc.contributor.authorMok, TMen_US
dc.contributor.authorLeung, KMen_US
dc.contributor.authorHo, AHPen_US
dc.contributor.authorChan, JCLen_US
dc.contributor.authorNg, CNen_US
dc.date.accessioned2012-08-08T09:08:01Z-
dc.date.available2012-08-08T09:08:01Z-
dc.date.issued1998en_US
dc.identifier.citationProceedings Of Spie - The International Society For Optical Engineering, 1998, v. 3504, p. 87-90en_US
dc.identifier.issn0277-786Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/159102-
dc.description.abstractLidar observations to study the nocturnal boundary layer in the atmosphere were made on selected evenings during December 1997 - March 1998 at the City University of Hong Kong (lat. 20°20′6 inches, long. 114°10′18 inches, at 57 m AMSL), Hong Kong. The ground-based Nd:YAG lidar has been operated to detect the vertical distribution of aerosols in the NBL at a subtropical urban site. It is shown that the vertical relative signal profiles can be employed to determine the heights of the single or multiple nocturnal inversions. In a clear sky and light wind evening transition period, the strong radiative cooling caused the air near the ground becomes stably stratified. The nocturnal inversion starts to emerge soon before sunset and grows vertically as the night progresses. The study also showed that the temporal evolution of the nocturnal inversion depth was rapidly increased soon after sunset and a slower rate in the midnight hours. The results of the study indicate that the vertical aerosol distribution in the multiple-layer is more complicated than that in the single-layer, of NBL. The early morning transition of the NBL is also discussed. A comparison of the lidar aerosol signals and radiosonde measurements was performed to evaluate the consistency of observations between the different systems.en_US
dc.languageengen_US
dc.publisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xmlen_US
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineeringen_US
dc.titleLidar probing the urban nocturnal boundary layeren_US
dc.typeConference_Paperen_US
dc.identifier.emailNg, CN:cnng@hkucc.hku.hken_US
dc.identifier.authorityNg, CN=rp00606en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0032290974en_US
dc.identifier.volume3504en_US
dc.identifier.spage87en_US
dc.identifier.epage90en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridMok, TM=26631451600en_US
dc.identifier.scopusauthoridLeung, KM=35732964000en_US
dc.identifier.scopusauthoridHo, AHP=7402675077en_US
dc.identifier.scopusauthoridChan, JCL=7403287195en_US
dc.identifier.scopusauthoridNg, CN=7401705590en_US

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