World Library  

QR link for Microphysical and Radiative Characterization of a Subvisible Midlevel Arctic Ice Cloud by Airborne Observations – a Case Study : Volume 9, Issue 8 (16/04/2009)
Add to Book Shelf
Flag as Inappropriate
Email this Book

Microphysical and Radiative Characterization of a Subvisible Midlevel Arctic Ice Cloud by Airborne Observations – a Case Study : Volume 9, Issue 8 (16/04/2009)

By Lampert, A.

Click here to view

Book Id: WPLBN0003991993
Format Type: PDF Article :
File Size: Pages 15
Reproduction Date: 2015

Title: Microphysical and Radiative Characterization of a Subvisible Midlevel Arctic Ice Cloud by Airborne Observations – a Case Study : Volume 9, Issue 8 (16/04/2009)  
Author: Lampert, A.
Volume: Vol. 9, Issue 8
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

Ehrlich, A., Dörnbrack, A., Wendisch, M., Mioche, G., Jourdan, O., Shcherbakov, V.,...Ritter, C. (2009). Microphysical and Radiative Characterization of a Subvisible Midlevel Arctic Ice Cloud by Airborne Observations – a Case Study : Volume 9, Issue 8 (16/04/2009). Retrieved from

Description: Alfred Wegener Institute for Polar and Marine Research, 14473 Potsdam, Germany. During the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) campaign, which was conducted in March and April 2007, an optically thin ice cloud was observed south of Svalbard at around 3 km altitude. The microphysical and radiative properties of this particular subvisible midlevel cloud were investigated with complementary remote sensing and in situ instruments. Collocated airborne lidar remote sensing and spectral solar radiation measurements were performed at a flight altitude of 2300 m below the cloud base. Under almost stationary atmospheric conditions, the same subvisible midlevel cloud was probed with various in situ sensors roughly 30 min later.

From individual ice crystal samples detected with the Cloud Particle Imager and the ensemble of particles measured with the Polar Nephelometer, microphysical properties were retrieved with a bi-modal inversion algorithm. The best agreement with the measurements was obtained for small ice spheres and deeply rough hexagonal ice crystals. Furthermore, the single-scattering albedo, the scattering phase function as well as the volume extinction coefficient and the effective diameter of the crystal population were determined. A lidar ratio of 21(±6) sr was deduced by three independent methods. These parameters in conjunction with the cloud optical thickness obtained from the lidar measurements were used to compute spectral and broadband radiances and irradiances with a radiative transfer code. The simulated results agreed with the observed spectral downwelling radiance within the range given by the measurement uncertainty. Furthermore, the broadband radiative simulations estimated a net (solar plus thermal infrared) radiative forcing of the subvisible midlevel ice cloud of −0.4 W m−2 (−3.2 W m−2 in the solar and +2.8 W m−2 in the thermal infrared wavelength range).

Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations – a case study

Baran, A.J., and Labonnote L.-C.: On the reflection and polarisation properties of ice cloud, J. Quant. Spectrom. Rad. T., 100, 41–54, 2006.; Ansmann, A., Wandinger, U., Riebesell, M., Weitkamp, C., and Michaelis, W.: Independent measurement of extinction and backscatter profiles in cirrus clouds by using a combined Raman elastic-backscatter lidar, Appl. Opt., 31, 33, 7113–7131, 1992.; Baran, A. J. and Francis, P. N.: On the radiative properties of cirrus cloud at solar and thermal wavelengths: A test of model consistency using high-resolution airborne radiance measurements, Q. J. Roy. Meteor. Soc., 130, 763–778, 2004.; Baran, A. J. and Labonnote L.-C.: A self-consistent scattering model for cirrus. I: The solar region, Q. J. Roy. Meteor. Soc., 133, 1899–1912, 2008.; Beyerle, G., Gross, M. R., Haner, D. A., Kjome, N. D., McDermid, I. S., McGee, T. J., Rosen, J. M., Schäfer, H.-J., and Schrems, O.: A Lidar and Backscatter Sonde Measurement Campaign at Table~Mountain during February-March 1997: Observations of Cirrus Clouds, J. Atmos. Sci., 58, 1275–1287, 2001.; Blanchet, J.-P. and List, R.: Estimation of optical properties of Arctic haze using a numerical model, Atmos. Ocean, 21, 444–464, 1983.; Cadet B., Goldfarb, L., Faduilhe, D., Baldy, S., Giraud, V., Keckhut, P., and Réchou, A.: A sub-tropical cirrus clouds climatology from Reunion Island (21° S, 55° E) lidar data set, GRL 30, 3, 1130, doi:10.1029/2002GL016342, 2003.; Cadet, B., Giraud, V., Haeffelin, M., Keckhut, P., Réchou, A., and Baldy, S.: Improved retrievals of the optical properties of cirrus clouds by a combination of lidar methods, Appl. Opt., 44(9), 1726–1734, 2005.; Chen, W. N., Chiang, C. W., and Nee, J. B.: Lidar ratio and depolarisation ratio for cirrus clouds, Appl. Opt., 31, 6470–6476, 2002.; Cox, C. and Munk, W.: Measurement of the roughness of the sea surface from photographs of the sun's glitter, J. Opt. Soc. Amer., 44, 838–850, 1954.; Curry, J. A. and Ebert, E. E.: Annual Cycle of Radiation Fluxes over the Arctic Ocean: Sensitivity to Cloud Optical Properties, J. Clim., 5, 1267–1280, 1992.; Curry, J. A., Rossow, W. B., Randall, D., and Schramm, J. L.: Overview of Arctic Cloud and Radiation Characteristics, J. Clim., 9, 1731–1764, 1996.; Dodson, B.: Weibull Analysis, Milwaukee, Wisconsin: ASQC, 256 pp., 1994.; Dye, J. E. and Baumgardner, D.: Evaluation of the Forward Scattering Spectrometer Probe. Part I: Electronic and optical studies, J. Atmos. Ocean. Technol., 1, 329–344, 1984.; Ehrlich, A., Bierwirth, E., Wendisch, M., Gayet, J.-F., Mioche, G., Lampert, A., and Heintzenberg, J.: Cloud phase identification of Arctic boundary-layer clouds from airborne spectral reflection measurements: test of three approaches, Atmos. Chem. Phys., 8, 7493–7505,~2008.; Francis, P. N., Foot, J. S., and Baran A. J.: Aircraft measurements of the solar and infrared radiative properties of cirrus and their dependence on ice crystal shape, J. Geophys. Res., 104, 31685–31696, 1999.; Gayet, J.-F., Crépel, O., Fournol, J. F., and Oshchepkov, S.: A new airborne polar Nephelometer for the measurements of optical and microphysical cloud properties. Part I: Theoretical design, Ann. Geophys., 15, 451–459, 1997.; Gayet, J.-F., Auriol, F., Minikin, A., Ström, J., Seifert, M., Krejci, R., Petzold, A., Febvre, G., and Schumann, U.: Quantitative measurement of the microphysical and optical properties of cirrus clouds with four different in situ probes: Evidence of small ice crystals, Geophys. Res. Lett., 29, 24, 2230, doi:10.1029/2001GL014342, 2002.; Gayet, J.-F., Shcherbakov, V. N., Mannstein, H., Minikin, A., Schumann, U., Ström, J., Petzold, A., Ovarlez, J., and Immler, F.: Microphysical and optical properties of midlatitude cirrus clouds observed in the southern hemisphere during INCA, Q. J. Roy. Meteor. Soc., 132, 621, 2719–2748, 2006.; Gayet J.-F., Stachlewska, I. S., Jourdan, O., Shcherbakov, V., Schwarzenboeck, A., and Neuber, R.: Microphysical and optical propert


Click To View

Additional Books

  • Effect of Photochemical Aging on the Ice... (by )
  • Analysing Time-varying Trends in Stratos... (by )
  • Variation of Particle Number Size Distri... (by )
  • Reconciliation of Essential Process Para... (by )
  • Modelling Sea Salt Aerosol and Its Direc... (by )
  • Evaluation of Ecmwf Era-40 Temperature a... (by )
  • Gas-particle Interactions Above a Dutch ... (by )
  • Applying the Cpcb Setup to Study the Hyg... (by )
  • Climate Impact of Supersonic Air Traffic... (by )
  • Assessment of China's Virtual Air Pollut... (by )
  • Influence of Surface Albedo Heterogeneit... (by )
  • Link Between Local Scale Bc Emissions an... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library 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.