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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Book
Performance Modeling of an Airborne Raman Water Vapor Lidar
David N. Whiteman,Geary Schwemmer,Timothy A. Berkoff,H. H. Plotkin,Luis Ramos-Izquierdo,Gelsomina Pappalardo +5 more
TL;DR: A sophisticated Raman lidar numerical model is developed to simulate the performance of two ground-based Raman water-vapor lidar systems and indicates that, under many circumstances, the daytime measurements possess comparable quality to an existing airborne differential absorption water-waste lidar whereas the nighttime measurements have improved spatial and temporal resolution.
Journal ArticleDOI
Use of a Fabry–Perot interferometer to isolate pure rotational Raman spectra of diatomic molecules
Y. Arshinov,S. M. Bobrovnikov +1 more
TL;DR: A Fabry-Perot interferometer (FPI) is used as a comb frequency filter to isolate pure rotational Raman spectra (PRRS) of nitrogen molecules to match the FPI transmission comb completely with the comb of nitrogen PRRS lines.
Journal Article
Raman Lidar Measurements of Aerosol Extinction and Backscattering
TL;DR: In this paper, the authors used both lidar and PCASP measurements to derive the dependence of particle size on relative humidity, the aerosol real refractive index n, and estimate the effective single-scattering albedo Omega(sub 0).
Journal ArticleDOI
Temperature sensitivity of an atmospheric Raman lidar system based on a XeF excimer laser
TL;DR: The temperature sensitivity of Raman backscattering from atmospheric nitrogen, oxygen, and water vapor is considered over the range of temperatures expected in the troposphere and bandpass filter characteristics are determined.
Journal ArticleDOI
Lidar technique for remote measurement of temperature by use of vibrational-rotational Raman spectroscopy
TL;DR: Simulations of the performance of an airborne lidar system (based on the Goddard Airborne Raman lidar) that employs this technique are presented.