Journal ArticleDOI
Examination of the traditional Raman lidar technique. I. Evaluating the temperature-dependent lidar equations.
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
Citations
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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
Dispersion of Air
Edson R. Peck,Kaye Reeder +1 more
TL;DR: In this article, a two-term Sellmeier formula was proposed to fit the resulting infrared data as well as the data selected by Edlen in the visible and ultraviolet (UV) wavelengths.
Journal ArticleDOI
Rayleigh scattering by air
TL;DR: In this paper, the Rayleigh scattering cross section for air is calculated from published experimental and theoretical results account being taken of the dispersion of the King correction factor, and the spectral region 0.2 mμ ⩽ λ ⌽ 1.0 mμ is covered.
Journal ArticleDOI
Turn-key Raman lidar for profiling atmospheric water vapor, clouds, and aerosols
TL;DR: In this paper, the authors describe an operational, self-contained, fully autonomous Raman lidar system that has been developed for unattended, around-the-clock atmospheric profiling of water vapor, aerosols, and clouds.
Turn-key Raman lidar for profiling atmospheric water vapor, clouds, and aerosols at the US Southern Great Plains Climate Study Site
TL;DR: An operational, self-contained, fully autonomous Raman lidar system that has been developed for unattended, around-the-clock atmospheric profiling of water vapor, aerosols, and clouds is described.
Journal ArticleDOI
Revised depolarization corrections for atmospheric extinction.
TL;DR: It is shown that the depolarization data now available are so accurate that their uncertainty affects the calculated Rayleigh optical depth by less than 1%, and consequently, the anomalously low extinctions occasionally reported must be due to systematic errors of measurement rather than errors in theRayleigh optical depths.