Journal ArticleDOI
Backscattering linear depolarization ratio measurements of mineral, sea-salt, and ammonium sulfate particles simulated in a laboratory chamber.
TLDR
The backscattering linear depolarization ratios of major types of tropospheric aerosol particles (Asian and Saharan mineral dust, sea salt, and ammonium sulfate) were measured using a laboratory chamber for interpreting the polarization lidar measurement of troposphere aerosols.Abstract:
The backscattering linear depolarization ratios of major types of tropospheric aerosol particles (Asian and Saharan mineral dust, sea salt, and ammonium sulfate) were measured using a laboratory chamber for interpreting the polarization lidar measurement of tropospheric aerosols. The values obtained from Asian and Saharan mineral particles were 0.39±0.04 to 0.05 (mean±standard deviation) for a high number of concentrations in the supermicrometer range and 0.17±0.03 to 0.14±0.03 in the submicrometer range. The values were 0.08±0.01 for sea-salt crystals, 0.04±0.003 for ammonium sulfate crystals, and 0.01±≤0.001 for both liquid droplets in the submicrometer range. These values can serve as a reference for estimating aerosol type using lidar measurement.read more
Citations
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Journal ArticleDOI
Aerosol classification using airborne High Spectral Resolution Lidar measurements – methodology and examples
Sharon P. Burton,Richard Ferrare,Chris A. Hostetler,J. W. Hair,R. R. Rogers,Michael D. Obland,Carolyn F. Butler,A. L. Cook,David B. Harper,Karl D. Froyd +9 more
TL;DR: In this article, a methodology based on observations of known aerosol types is used to qualitatively classify the extensive set of airborne high-spectral resolution lidar measurements into eight separate types.
Journal ArticleDOI
Characterization of Saharan dust, marine aerosols and mixtures of biomass-burning aerosols and dust by means of multi-wavelength depolarization and Raman lidar measurements during SAMUM 2
Silke Groß,Matthias Tesche,Volker Freudenthaler,Carlos Toledano,Carlos Toledano,Matthias Wiegner,Albert Ansmann,Dietrich Althausen,Meinhard Seefeldner +8 more
TL;DR: In this paper, the particle linear depolarization ratio of Saharan dust, marine aerosols and mixtures of biomass-burning aerosols from southern West Africa and Saharan Dust was determined at three wavelengths with three lidar systems during the SAharan Mineral dUst experiMent 2 at the airport of Praia, Cape Verde, between 22 January and 9 February 2008.
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
Aerosol classification by airborne high spectral resolution lidar observations
Silke Groß,Michael Esselborn,Michael Esselborn,Bernadett Weinzierl,Martin Wirth,Andreas Fix,Andreas Petzold,Andreas Petzold +7 more
TL;DR: In this paper, an aerosol mask was developed that is capable to identify complex stratifications with different aerosol types throughout the atmosphere using high-spectral resolution lidar (HSRL) data.
Journal ArticleDOI
Observations of the spectral dependence of linear particle depolarization ratio of aerosols using NASA Langley airborne High Spectral Resolution Lidar
Sharon P. Burton,J. W. Hair,Michael Kahnert,Michael Kahnert,R. A. Ferrare,Chris A. Hostetler,A. L. Cook,David B. Harper,Timothy A. Berkoff,S. T. Seaman,S. T. Seaman,J. E. Collins,Marta A. Fenn,R. R. Rogers,R. R. Rogers +14 more
TL;DR: In this paper, the authors presented the results of three case studies from the NASA Langley airborne High Spectral Resolution Lidar-2 (HSRL-2) for three wavelengths: 355, 532, and 1064 nm.
References
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Journal ArticleDOI
Discrete-Dipole Approximation For Scattering Calculations
Bruce T. Draine,Piotr J. Flatau +1 more
TL;DR: In this article, the authors used the discrete-dipole approximation (DDA) for scattering calculations, including the relationship between the DDA and other methods, including complex-conjugate gradient algorithms and fast-Fourier transform methods.
Journal ArticleDOI
Water activities, densities, and refractive indices of aqueous sulfates and sodium nitrate droplets of atmospheric importance
I.N. Tang,H.R. Munkelwitz +1 more
TL;DR: Water activities, densities, and refractive indices for solution droplets containing a single salt of either (NH{sub 4} ), (SO{sub 2} ), NH{sub 3} and NaNO{sub 5] are reported in this article.
Journal ArticleDOI
Capabilities and limitations of a current FORTRAN implementation of the T-matrix method for randomly oriented, rotationally symmetric scatterers
TL;DR: A detailed description of modern ¹-matrix FORTRAN codes which incorporate all recent developments, are publicly available on the World Wide Web, and are, apparently, the most efficient and powerful tool for accurately computing light scattering by randomly oriented rotationally symmetric particles is provided.
Journal ArticleDOI
Depolarization ratio profiling at several wavelengths in pure Saharan dust during SAMUM 2006.
Volker Freudenthaler,Michael Esselborn,Matthias Wiegner,Birgit Heese,Matthias Tesche,Albert Ansmann,Detlef Müller,Dietrich Althausen,Martin Wirth,Andreas Fix,Gerhard Ehret,Peter Knippertz,Carlos Toledano,Josef Gasteiger,Markus Garhammer,Meinhard Seefeldner +15 more
TL;DR: In this paper, the vertical profiles of the linear particle depolarization ratio of pure dust clouds were measured during the Saharan Mineral Dust Experiment (SAMUM) at Ouarzazate, Morocco, close to source regions in May-June 2006, with four lidar systems at four wavelengths (355, 532, 710 and 1064 nm).
Journal ArticleDOI
Continuous observations of Asian dust and other aerosols by polarization lidars in China and Japan during ACE-Asia
Atsushi Shimizu,Nobuo Sugimoto,Ichiro Matsui,Kimio Arao,Itsushi Uno,Toshiyuki Murayama,Naoki Kagawa,Kazuma Aoki,Akihiro Uchiyama,A. Akihiro Yamazaki +9 more
TL;DR: In this paper, the authors used polarization lidars for continuous observations of aerosols in China and Japan during March to May 2001, corresponding with the Asian Pacific Regional Aerosol Characterization Experiment (ACE-Asia) field campaign period.