World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Circular Depolarization Ratios of Single Water Droplets and Finite Ice Circular Cylinders: a Modeling Study : Volume 11, Issue 11 (08/11/2011)

By Nicolet, M.

Click here to view

Book Id: WPLBN0003995740
Format Type: PDF Article :
File Size: Pages 20
Reproduction Date: 2015

Title: Circular Depolarization Ratios of Single Water Droplets and Finite Ice Circular Cylinders: a Modeling Study : Volume 11, Issue 11 (08/11/2011)  
Author: Nicolet, M.
Volume: Vol. 11, Issue 11
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Schnaiter, M., Stetzer, O., & Nicolet, M. (2011). Circular Depolarization Ratios of Single Water Droplets and Finite Ice Circular Cylinders: a Modeling Study : Volume 11, Issue 11 (08/11/2011). Retrieved from

Description: Institute for Atmospheric and Climate Science, ETH Zurich, 8092, Zurich, Switzerland. Computations of the phase matrix elements for single water droplets and ice crystals in fixed orientations are presented to determine if circular depolarization Δ±C is more accurate than linear depolarization for phase discrimination. T-matrix simulations were performed to calculate right-handed and left-handed circular depolarization ratios Δ+C, respectively Δ−C and to compare them with linear ones. Ice crystals are assumed to have a circular cylindrical shape where their surface-equivalent diameters range up to 5 μm. The circular depolarization ratios of ice particles were generally higher than linear depolarization and depended mostly on the particle orientation as well as their sizes. The fraction of non-detectable ice crystals (Δ < 0.05) was smaller considering a circular polarized light source, reaching 4.5%. However, water droplets also depolarized light circularly for scattering angles smaller than 179° and size parameters smaller than 6 at side- and backscattering regions. Differentiation between ice crystals and water droplets might be difficult for experiments performing at backscattering angles which deviate from 180° unlike lidar applications. If the absence of the liquid phase is confirmed, the use of circular depolarization in single particle detection is more sensitive and less affected by particle orientation.

Circular depolarization ratios of single water droplets and finite ice circular cylinders: a modeling study

G{\ o}tz, G., M{é}sz{á}ros, E., and Vali, G.: Atmospheric Particles and Nuclei, Akad{é}miai Kiad{ó}, Budapest, 1991.; Baran, A. J., Yang, P., and Havemann, S.: Calculation of the single-scattering properties of randomly oriented hexagonal ice columns: a comparison of the T-matrix and the finite-difference time-domain methods, Appl. Opt., 40, 4376–4386, 2001.; Bundke, U., Nilius, B., Jaenicke, R., Wetter, T., Klein, H., and Bingemer, H.: The fast ice nucleus chamber FINCH, Atmos. Res., 90, 180–186, 2008.; Cantrell, W. and Heymsfield, A.: Production of ice in tropospheric clouds – a review, B. Am. Meteorol. Soc., 86, 795, doi:10.1175/BAMS-86-6-795, 2005.; Forster, P., Ramaswamy, V., Artaxo, P., Bernsten, T., Betts, R., Fahey, D. W., Haywood, J., Lean, J., Lowe, D. C., Myhre, G., Nganga, J., Prinn, R., Raga, G., Schulz, M., and Dorland, R. V.: Climate Change 2007: The Physical Science Basis, Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, Cambridge, UK and New York, USA, 2007.; Hu, Y. X., Yang, P., Ling, B., Gibson, G., and Hostetler, C.: Discriminating between spherical and non-spherical scatterers with lidar using circular polarization: a theoretical study, J. Quant. Spectrosc. Ra., 79–80, 757–764, 2003.; Liou, K. N. and Lahore, H.: Laser sensing of cloud composition: a backscattered depolarization technique, J. Appl. Meteorol., 13, 257–263, 1974.; Liou, K. N. and Schottland, R. M.: Multiple backscattering and depolarization from water clouds for a pulsed lidar system, J. Atmos. Sci., 28, 772–784, 1971.; Liu, L., Mishchenko, M. I., Cairns, B., Carlson, B. E., and Travis, L. D.: Modeling single-scattering properties of small cirrus particles by use of a size-shape distribution of ice spheroids and cylinders, J. Quant. Spectrosc. Ra., 101, 488–497, 2006.; Lohmann, U. and Feichter, J.: Global indirect aerosol effects: a review, Atmos. Chem. Phys., 5, 715–737, doi:10.5194/acp-5-715-2005, 2005.; Mishchenko, M. I.: Calculation of the amplitude matrix for a nonspherical particle in a fixed orientation, Appl. Opt., 39, 1026–1031, 2000.; Mishchenko, M. I.: Electromagnetic scattering by nonspherical particles: A tutorial review, J. Quant. Spectrosc. Ra., 110, 808–832, doi:{10.1016/j.jqsrt.2008.12.005}, Annual Meeting of the Association-for-Aerosol-Research, Karlsruhe, Germany, 3–4 July 2008, 2009.; Mishchenko, M. I.: T-matrix codes for computing electromagnetic scattering by nonspherical and aggregated particles, available at:, last access: 7 November 2011, 2011.; Mishchenko, M. I., Travis, L. D., and Lacis, A. A.: Scattering, Absorption, and Emission of Light by Small Particles, Cambridge University Press, Cambridge, UK, 2002.; Nicolet, M., Stetzer, O., and Lohmann, U.: Depolarization ratios of singles ice particles assuming finite circular cylinders, Appl. Opt., 46, 4465–4476, 2007.; Nicolet, M., Stetzer, O


Click To View

Additional Books

  • Response of Acid Mobilization of Iron-co... (by )
  • Gauss-seidel Limb Scattering (Gsls) Radi... (by )
  • A Case of Extreme Particulate Matter Con... (by )
  • Co Emission and Export from Asia: an Ana... (by )
  • Airborne Measurements of Hcl from the Ma... (by )
  • Protocol for the Development of the Mast... (by )
  • The Influence of Foreign Vs. North Ameri... (by )
  • Chemistry and Transport of Pollution Ove... (by )
  • Observations of NoX, Σpns, Σans, and Hno... (by )
  • Climatic Controls on Water Vapor Deuteri... (by )
  • Airborne Observations of Total Rono2: Ne... (by )
  • First-year Sea-ice Contact Predicts Brom... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library on the Kindle are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.