References

ACPD

Atmospheric Chemistry and Physics Discussions

ACPD

1680-7375

Copernicus GmbH

Göttingen, Germany

10.5194/acpd-9-11333-2009

Microphysical and optical properties of Arctic mixed-phase clouds – the 9 April 2007 case study

Gayet

J.-F.

¹ Mioche

¹ Dörnbrack

² Ehrlich

³ ⁵ Lampert

⁴ Wendisch

³ ⁵

Laboratoire de Météorologie Physique, Université Blaise Pascal, Clermont-Ferrand, France

Institute for Atmospheric Physics, DLR Oberpfaffenhofen, Wessling, Germany

Johannes Gutenberg University, Institute for Atmospheric Physics, Mainz, Germany

Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany

now at: University of Leipzig, Leipzig Institute for Meteorology (LIM), Leipzig, Germany

06 05 2009

9 3 11333 11366

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Airborne measurements in Arctic boundary-layer stratocumulus were carried out near Spitsbergen on 9 April 2007 during the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) campaign. A unique set of co-located observations is used to describe the cloud properties, including detailed in situ cloud microphysical and radiation measurements along with airborne and co-located spaceborne remote sensing data (Lidar on Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations [CALIPSO] and radar on CloudSat satellites). The CALIPSO profiles evidence a cloud top temperature which varies between −24°C and −21°C. The in situ cloud observations reveal that the attenuated backscatter signal from lidar along the aircraft trajectory is linked with the presence of liquid water and therefore confirms a cloud top layer dominated by liquid-water, which is a common feature observed in Arctic mixed-phase stratocumulus clouds. A low concentration of quite large ice crystals are also evidenced up to the cloud top and lead to significant CloudSat radar echo. Since the ratio of the extinction of liquid water droplets and ice crystals is high the broadband radiative effects near the cloud top are mostly dominated by water droplets. CloudSat observations as well as in situ measurements reveal high reflectivity factors (up to 15 dBZ) and precipitation rates (1 mm h−1). This feature is due to efficient ice production processes. About 25% of the theoretically available liquid water is converted into ice water with large ice crystals which precipitate. According to an estimation of the mean cloud cover, a considerable value of 106 m3 h−1 of fresh water could be settled over the Greenland sea pool. European Centre for Medium-Range Weather Forecast (ECMWF) operational analyses reproduces the variation of the boundary layer height along the flight track. However, small-scale features in the observed cloud field cannot be resolved by ECMWF analysis. Furthermore, ECMWF's diagnostic partitioning of the condensed water into ice and liquid reveals serious shortcomings for Arctic mixed-phased clouds. Too much ice is modeled.

References 1

Baker, B. and Lawson, R. P.: Improvement in Determination of Ice Water Content from Two-Dimensional Particle Imagery, Part I: Image-to-Mass Relationships, J. Appl. Meterol. Clim., 45, 1282–1290, 2006.

Baumgardner D., Gayet, J.-F., Gerber, H., Korolev, A. V. and Twohy, C.: Cloud Measurement Techniques In Situ, edited by: Holton, J. R., Curry, J. A. and Pyle, J., Encyclopedia of Atmospheric Sciences, London, Academic Press, 4000 pp., 2002.

Beesley, J. A., Bretherton, C. S., Jakob, C., Andreas, E. L., Intrieri, J. M., and Uttal, T. A.: A comparison of cloud and boundary layer variables in the ECMWF forecast model with observations at Surface Heat Budget of the Arctic Ocean (SHEBA) ice camp, J. Geophys. Res., 105, 12337–12349, 2000.

Hyoun-Myoung, C., Yang, P., Kattawar, G. W., Nasiri, S. L., Hu, Y., Minnis, P., Trepte, C., and Winker, D.: Depolarizatin ratio and attenuated backscatter for nine cloud types: analyses based on collocated CALIPSO lidar and MODIS measurements, Opt. Express, 16, 3931–3948, 2008.

CPIview. CPI data processing software. SPEC Incorporated Boulder, Colorado, (http://www.specinc.com/publications/CPIview_Manual.pdf), 2005.

Curry, J. A., Rossow, W. B., Randall, D., and Schramm, J. L.: Overview of Arctic Cloud and Radiation Characteristics, J. Climate, 9, 1731–1764, 1996.

Dickson, B., Yashayaev, I., Meincke, J., Turrell, B., Dye, S., and Holfort, J.: Rapid freshening of the deep North Atlantic Ocean over the past four decades, Nature, 416, 832–837, 2002.

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.

Field, P. R., Wood, R., Brown, P. R. A., Kaye, P. H., Hirst, E., Greenaway, R., and Smith, J. A.: Ice particle interarrival times measured with a Fast FSSP, J. Atmos. Sci., 20, 249–261, 2003.

Field, P. R., Heymsfield, A. J., and Bansemer, A.: Shattering and interarrival times measured by optical array probes in ice clouds, J. Atmos. Ocean. Tech., 23, 1357–1371, 2006.

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., Asano, S., Yamazaki, A., Uchiyama, A., Sinyuk, A., Jourdan, O., and Auriol, F.: Two case studies of continental-type water and maritime mixed-phased stratocumuli over the sea. Part I : Microphysical and Optical properties. J. Geophys. Res., 107, doi:10.1029/2001JD1106, 2002.

Heymsfield, A. J.: On measurements of small ice particles in clouds, Geophys. Res. Lett., 34, doi:10.1029/2007GL030951, 2007.

Hobbs, P. V. and Rangno, A. L.: Microstrusture of low and middle-level clouds over the Beaufort Sea, Q. J. Roy. Meteor. Soc., 124, 2035–2071, 1998.

Hu, Y., Vaughan, M., Liu, Z., Lin, B., Yang, P., Flittner, D., Hunt, B., Kuehn, R., Huang, J., Wu, D., Rodier, S., Powell, K., Trepte, C., Winker, D.: The depolarization – attenuated backscatter relation: CALIPSO lidar measurements vs. theory, Opt. Express, 15, 9, 5327–5332, 2007.

Inoue, J., Liu, J., Pinto, J. O., and Curry, J. A.: Intercomparison of Arctic Regional Climate Models: Modeling Clouds and Radiation for SHEBA in May 1998, J. Climate, 19, 4167–4178, 2006.

IPCC, Intergovernmental Panel on Climate Change, Climate Change 2007 – the Fourth Assessment Report of the IPCC, Cambridge University Press. ISBN 978 0521 88009-1, 2007.

Knollenberg, R. G.: Techniques for probing cloud microstructure, in: Clouds, Their Formation, Optical Properties, and Effects, edited by: Hobbs, P. V. and Deepak, A., Academic Press, New York, 15–91, 1981.

Kolstad, E. W., Bracegirdle, T. J., and Seierstad, I. A.: Marine cold-air outbreaks in the North Atlantic: temporal distribution and associations with large-scale atmospheric circulation, Clim. Dynam., doi10.1007/s00382-008-0431-5, 2008.

Korolev, A. and Isaac, G. A.: Shattering during sampling by OAPs and HVPS. Part I: Snow particles, J. Atmos. Oceanic Techn., 22, 528–543, 2005.

Lampert, A., Ehrlich, A., D�rnbrack, A., Jourdan, O., Gayet, J.-F., Mioche, G., Shcherbakov, V., Ritter, C., and Wendisch, M.: Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations – a case study, Atmos. Chem. Phys., 9, 2647–2661, 2009.

Lawson, R. P., Baker, B. A., and Schmitt,C. G.: An overview of microphysical properties of Arctic clouds observed in May and July 1998 during FIRE ACE, J. Geophys. Res., 106, 14989–15014, 2001.

Lawson, R. P. and Baker, B. A.: Improvement in determination of ice water content from two-dimensional particle imagery, Part II: Applications to collected data, J. Appl. Meteorol., 45, 9, 1291–1303, 2006.

Lawson, R. P.: Personal communication, 2008.

Lefèvre, R.: Physique de la mesure de la sonde CPI. Application à la campagne ASTAR. Thèse de l'Université Blaise Pascal. Available at LaMP, 24 av. des Landais 63177 Aubière, France, 187 pp., 2006.

McFarquhar, G., Zhang, G., Poellot, M. R., Kok, G. L., McCoy, R., Tooman, T., Fridlind, A., and Heymsfield, A.: Ice properties of single-layer stratocumulus during the Mixed-Phase Arctic Cloud Experiment, J. Geophys. Res., 112, doi:10.1029/2007JD008633, 2007.

Mioche, G., Gayet, J.-F., Minikin, A., Herber, A., and Pelon, J.: A comparison between CloudSat and aircraft data for mixed-phase and cirrus clouds EGU symposium, Vienna, Austria, 19–24 April 2009.

Morrison, H. and Pinto, J. O.: Intercomparison of bulk cloud microphysics schemes in mesoscale simulations of springtime Arctic mixed-phase stratiform clouds, Mon. Weather Rev., 134, 1880–1900, 2006.

Prenni, A. J., Harrington, J. Y., Tjernström, M., DeMott, P. J., Avramov, A., Long, C. N., Kreidenweis, S. M., Olsson, P. Q., and Verlinde, J.: Can ice-nucleating aerosols affect Arctic seasonal climate?, B. Am. Meteorol. Soc., 88, 541–550, doi:10.1175/BAMS-88-4-541, 2007.

Richter, A., Gayet, J.-F., Mioche, G., Ehrlich, A., and Dörnbrack, A.: Mixed-Phase Clouds in the Arctic: A Synopsis of Airborne Lidar, In-Situ, and Albedometer Observations, complemented by Meteorological Analyses. 24th International Laser Radar Conference (ILRC), 23–27 June 2008, Boulder, USA, 881–884, 2008.

Rossow, W. B., Walker, A. W., and Garder, L. C.: Comparison of ISCCP cloud detection, J. Climate, 6, 2370–2393, 1993.

Sandvik, A., Biryulina, M., Kvamsto, N. G., Stames, J. J., and Stames, K.: Observed and simulated composition of Atctic clouds: Data properties and model validation, J. Geophys. Res., 112, doi:10.1029/2006JD007351, 2007.

Sassen, K. and Liou, K. N.: Scattering of polarized laser light by water droplet, mixed-phase and ice crystal clouds. Part I: Angular scattering pattern, J. Atmos. Sci., 36, 838–851, 1979.

Shupe, M. D., Matrosov, S. Y., and Uttal, T.: Arctic mixed-phase cloud properties derive from surface-based sensors at SHEBA, J. Atmos. Sci., 63, 697–711, 2006.

Stachlewska, I.S., Wehrle, G., Stein, B., and Neuber, R.: Airborne Mobile Aerosol Lidar for measurements of Arctic aerosol, in: Proceeding of the 22nd International Laser Radar Conference, edited by: Pappalardo, G. and Amodeo, A., ESA SP-561, 87–89, 2004.

Stachlewska I.S.: Investigation of tropospheric arctic aerosol and mixed-phase clouds using airborne lidar technique, PhD thesis, University of Potsdam, 100 pp., (http://opus.kobv.de/ubp/volltexte/2006/698/), 2006.

Stephens, G. L., Vane, D. G., Boain, R. J., Mace, G. G., Sassen, K., Wand, Z. E., Illingworth, A. J., O'Connor, E. J., Rossow, W. B., Durden, S. L., Miller, S., Austin, R. T., Benedetti, A., and Mitrescu, C.: The CloudSat mission and the A-train. A new dimension of space-based observations of clouds and precipitation, B. Am. Meteorol. Soc., 83, 1771–1790, 2002.

Tziperman, E. and Gildor, H.: The stabilization of the thermohaline circulation by the temperature-precipitation feedback, J. Phys. Ocean., 32, 2707–2714, 2002.

Verlinde, J., Harrington, J. Y., McFarquhar, G. M., et al.: The mixed-phase Arctic cloud experiment (M-PACE), B. Am. Meteorol. Soc., doi:10.1175/BAMS-88-2-205, 2007.

Wendisch, M., Müller, D., Schell, D., and Heintzenberg, J.: An airborne spectral albedometer with active horizontal stabilization, J. Atmos. Oceanic Tech., 18, 1856–1866, 2001.

Winker, D. M., Pelon, J., and McCormick, M. P.: The CALIPSO mission: Spaceborne lidar for observation of aerosols and clouds, Status and Performance, Proc. SPIE, 4893, 1–11, 2003.

Winker, D. and Trepte, C.: Distribution and Characteristics of Polar Clouds from CALIOP, A-Train-Lille 07 symposium, 22–25 October 2007.