Journal ArticleDOI
Examination of the traditional Raman lidar technique. I. Evaluating the temperature-dependent lidar equations.
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TLDR
The results indicate that, for the range of temperatures encountered in the troposphere, the magnitude of the temperature-dependent effect can reach 10% or more for narrowband Raman water-vapor measurements.Abstract:
The essential information required for the analysis of Raman lidar water vapor and aerosol data acquired by use of a single laser wavelength is compiled here and in a companion paper [Appl. Opt. 42, 2593 (2003)]. Various details concerning the evaluation of the lidar equations when Raman scattering is measured are covered. These details include the influence of the temperature dependence of both pure rotational and vibrational-rotational Raman scattering on the lidar profile. The full temperature dependence of the Rayleigh-Mie and Raman lidar equations are evaluated by use of a new form of the lidar equation where all the temperature dependence is carried in a single term. The results indicate that, for the range of temperatures encountered in the troposphere, the magnitude of the temperature-dependent effect can reach 10% or more for narrowband Raman water-vapor measurements. Also, the calculation of atmospheric transmission, including the effects of depolarization, is examined carefully. Various formulations of Rayleigh cross-section determination commonly used in the lidar field are compared and reveal differences of as much as 5% among the formulations. The influence of multiple scattering on the measurement of aerosol extinction with the Raman lidar technique is considered, as are several photon pulse pileup-correction techniques.read more
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Journal ArticleDOI
Aerosol lidar intercomparison in the framework of the EARLINET project. 3. Raman lidar algorithm for aerosol extinction, backscatter, and lidar ratio
Gelsomina Pappalardo,Aldo Amodeo,Marco Pandolfi,Ulla Wandinger,Albert Ansmann,Jens Bösenberg,Volker Matthias,V. Amirdis,F. De Tomasi,M. Frioud,Marco Iarlori,L. Komguem,Alexandros Papayannis,Francesc Rocadenbosch,Xuan Wang +14 more
TL;DR: An intercomparison of the algorithms used to retrieve aerosol extinction and backscatter starting from Raman lidar signals has been performed by 11 groups of lidar scientists involved in the European Aerosol Research Lidar Network and demonstrates that the data-handling procedures used by all the lidar groups provide satisfactory results.
Book
Aerosol pollution impact on precipitation : a scientific review
Zev Levin,William R. Cotton +1 more
TL;DR: In this paper, the distribution of Atmospheric Aerosols: Transport, transformation and removal, in situ and remote sensing techniques for measuring aerosols, Clouds and Precipitation are presented.
Journal ArticleDOI
The automated multiwavelength Raman polarization and water-vapor lidar Polly XT : the neXT generation
Ronny Engelmann,Thomas Kanitz,Holger Baars,Birgit Heese,Dietrich Althausen,Annett Skupin,Ulla Wandinger,Mika Komppula,Iwona S. Stachlewska,Vassilis Amiridis,Eleni Marinou,Ina Mattis,Holger Linné,Albert Ansmann +13 more
TL;DR: In this paper, the authors present recent changes of the setup of the portable multiwavelength Raman and polarization lidar PollyXT and discuss the improved capabilities of the system by means of a case study.
Journal ArticleDOI
Saharan dust intrusions in the Mediterranean area: Three years of Raman lidar measurements
TL;DR: In this article, a multi-year climatological study of Saharan dust intrusions in the central Mediterranean in terms of aerosol optical parameters vertical profiles is carried out for the first time.
Journal ArticleDOI
Characterization of Asian dust and Siberian smoke with multi‐wavelength Raman lidar over Tokyo, Japan in spring 2003
Toshiyuki Murayama,Detlef Müller,Katsuya Wada,Atsushi Shimizu,Miho Sekiguchi,Tatsuro Tsukamoto +5 more
TL;DR: In this article, a dual-wavelength Raman lidar was used to measure the optical properties of the free troposphere over Tokyo, Japan with a single-scattering albedo at 532 nm.
References
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Journal ArticleDOI
Cloud Liquid Water, Mean Droplet Radius and Number Density Measurements Using a Raman Lidar
TL;DR: In this paper, a new technique for measuring cloud liquid water, mean droplet radius, and droplet number density is outlined, based on simultaneously measuring Raman and Mie scattering from cloud liquid droplets using a Raman lidar.
Journal ArticleDOI
The ro-vibrational Raman spectrum of water vapour υ2 and 2υ2
TL;DR: In this paper, weak spectral features in the Raman spectrum of water vapour associated with the v 2 and 2v 2 vibrations have been reproduced by computer simulation using the results of high-resolution absorption spectral analyses.
Journal ArticleDOI
Ro-vibrational Raman Cross Sections of Water Vapor in the OH Stretching Region.
TL;DR: It is shown that the anharmonic coupling between the vibrational states nu1 and nu3 has to be considered for a correct simulation of the Raman spectrum of H2O, using an improved spectrometer of very high sensitivity.
Journal ArticleDOI
Raman lidar measurements of Pinatubo aerosols over southeastern Kansas during November-December 1991
TL;DR: Raman lidar measurements over southeastern Kansas of stratospheric aerosols produced by the June 1991 eruptions of Mt. Pinatubo were made on 10 nights during November and December 1991.
Book
Raman Lidar Measurements of Water Vapor and Cirrus Clouds During the Passage of Hurricane Bonnie
D. N. Whiteman,K. D. Evans,Belay Demoz,D. O'c. Starr,Edwin W. Eloranta,David C. Tobin,Wayne F. Feltz,G. J. Jedlovec,Seth I. Gutman,Geary K. Schwemmer,M. Cadirola,S. H. Melfi,F. J. Schmidlin +12 more
TL;DR: In this paper, a correction technique is presented which minimizes the influences of multiple scattering and derives information about cirrus cloud optical and physical properties, based on a comparison of lidar and GOES measurements.