Atmospheric Chemistry and Physics www.atmos-chem-phys.net 1680-7316 1680-7324 8 16 2008 10.5194/acp-8-4547-2008 http://www.atmos-chem-phys.net/8/4547/2008/ http://www.atmos-chem-phys.net/8/4547/2008/acp-8-4547-2008.html http://www.atmos-chem-phys.net/8/4547/2008/acp-8-4547-2008.pdf 4547 4558 2008-08-06 Variability of cirrus clouds in a convective outflow during the Hibiscus campaign F. Fierli f.fierli@isac.cnr.it G. Di Donfrancesco F. Cairo V. Marécal M. Zampieri E. Orlandi G. Durry Istituto di Scienze dell'Atmosfera e del Clima, CNR, Italy Ente Nazionale Energia e Ambiente, Dipartimento Clima, Italy Laboratoire de Physique et Chimie de l'Environnement, CNRS and Université d'Orléans, France Groupe de Spectroscopie Moléculaire et Atmosphérique, CNRS and Université de Reims, France Service d'Aéronomie, CNRS and Institut Pierre et Simon Laplace, France Light-weight microlidar and water vapour measurements were taken on-board a stratospheric balloon during the HIBISCUS 2004 campaign, held in Bauru, Brazil (49° W, 22° S). Cirrus clouds were observed throughout the flight between 12 and 15 km height with a high mesoscale variability in optical and microphysical properties. It was found that the cirrus clouds were composed of different layers characterized by marked differences in height, thickness and optical properties. Simultaneous water vapour observations show that the different layers are characterized by different values of the saturation with respect to ice. A mesoscale simulation and a trajectory analysis clearly revealed that the clouds had formed in the outflow of a large and persistent convective region and that the observed variability of the optical properties and of the cloud structure is likely linked to the different residence times of the convectively-processed air in the upper troposphere. Ackerman, T. P., Liou, K.-N., Valero P. J., and Pfister L.: Heating rates in tropical anvils, J. Atmos. Sci., 45, 1606–1623, 1988. Buzzi, A. and Foschini, L.: Mesoscale meteorological features associated with heavy precipitation in the southern Alpine region, Meteorol. Atmos. Phys., 72, 131–146, 2000. Corti T., Luo, B. P., Fu, Q., Vomel, H., and Peter, T.: The impact of cirrus clouds on tropical troposphere-to-stratosphere transport, Atmos. Chem. Phys., 6, 2539–2547, 2006. Davies H. C.: A lateral boundary formulation for multilevel prediction models, Q. J. R. Meteorol. Soc., 102, 405–418, 1976. Dessler, A. E. and Yang, P.: The Distribution of Tropical Thin Cirrus Clouds Inferred from Terra MODIS Data, J. Climate, 16, 1241–1247,2003. Di Donfrancesco, G., Cairo, F., Buontempo, C., et al. : Balloonborne Lidar for cloud physics studies, Appl. Opt., 42, 22, 5701–5708, 2006. Durry, G., Huret, N., Hauchecorne, A., Marecal, V., Pommereau, J.-P., Jones, R. L., Held, G., Larsen, N., and Renard, J.-B.: Isentropic advection and convective lifting of water vapor in the UT - LS as observed over Brazil (22° S) in February 2004 by in situ high-resolution measurements of H2O, CH4, O3 and temperature, Atmos. Chem. Phys. Discuss., 6, 12469–12501, 2006. Folkins, I. and Martin, R.V.: The vertical structure of tropical convection and its impact on the budgets of water vapor and ozone, J. Atmos. Sci.,62, 1560–1573, 2005. Fueglistaler, S., Bonazzola, M., Haynes, P. H., Peter, T.: Stratospheric water vapor predicted from the Lagrangian temperature history of air entering the stratosphere in the tropics, J. Geophys. Res., 110, D08107, doi:10.1029/2004JD005516, 2005. Fueglistaler, S. and Fu, Q.: Impact of clouds on radiative heating rates in the tropical lower stratosphere, J. Geophys. Res., 111, D23202, doi:10.1029/2006JD007273, 2006. Gettelman, A., Salby, M. L., and Sassi, F.: Distribution and influence of convection in the tropical tropopause region, J. Geophys. Res.-Atmos.,1737–1746, doi:1029/2006JD004080, 2002. Gheusi, F. and Stein, J.: Lagrangian description of airflows using Eulerian passive tracers, Q. J. R. M. S., 128, 579, 337–360, 2002. Hartmann, R. L.: Radiative effects of clouds on Earth's climate. Aerosol-Cloud-Climate Interactions,International Geophysical Series, 54, Academic Press, P. V. Hobbs Editor, 151–173, 1993. Holton, J. R., Haynes, P. H. , Douglass, A. R., Rood ,R. B., and Pfister, L.: Stratosphere-troposphere exchange. Rev. Geophys., 33(4),403–439, 1995. Kain, J. S. and Fritsch, J. M.: A one-dimensional entraining/detraining plume model and its application in convective parameterization. J. Atmos. Sci., 47, 2784–2802, 1990. Kain, J. S. and Fritsch, J. M.: Multiscale Convective Overturning in Mesoscale Convective Systems: Reconciling Observations, Simulations, and Theory, Mon. Wea. Rev., 126, 2254–2273, 1998. Kain J. S.: The Kain-Fritsch convective parametrization: an update, J. App. Meteorol., 43, 170–181, 2004. King, M. A., Chee, S., Platinick, S. E., Wang, M., and Liou, K.: Cloud Retrieval Algorithms for MODIS: Optical Thickness, Effective Particle Radius, and Thermodynamic Phase, Algorithm Theoretical Basis Document No ATBD-MOD-MOD06 Cloud product, 1997. Lehman, R.: On the choice of relaxation coefficients for Davies' lateral boundaries scheme for regional weather prediction models, Meteorol. Atmos. Phys., 52, 1–14, 1993. Liou, K.-N.: Influence of cirrus clouds on weather and climate processes: A global perspective, 1986, Mon. Wea. Rev., 114, 1167–1200, 1986. Liu, L. and Mishchenko, M. I.: Constraints on PSC particle microphysics derived from lidarobservations, Journal of Quantitative Spectroscopy and Radiative Transfer, 70, 817–831, 2001. Liu, C. and Zipser, E. J.: Global distribution of convection penetrating the tropical tropopause, J. Geophys. Res., 110, D23104, doi:10.1029/2005JD006063, 2005. Mace, G. G., Zhang, Y., Platnick, S., King, M. D., Minnis, P., and Yang, P.: Evaluation of Cirrus Cloud Properties Derived from MODIS Data Using Cloud Properties Derived from Ground-Based Observations Collected at the ARM SGP Site, J. Appl. Meteorol., 44, 221–240, 2005. Mace, G. G., Benson, S., and Vernon, E.: Cirrus Clouds and the Large-Scale Atmospheric State: Relationships Revealed by Six Years of Ground-Based Data, J. Climate, 19, 3257–3278, doi:10.1175/JCLI3786.1, 2006. Marécal V., Durry G., Longo K., Freitas S., Riviere E.D. and M. Pirre: Mesoscale modelling of water vapour in the tropical UTLS: two case studies from the HIBISCUS campaign, Atmos. Chem. Phys., 7, 1471–1489, 2007. Marti, L. and Mauersberger, K.:A survey and new measurements of ice vapor pressure at temperatures between 170 and 250 K, Geophys. Res. Lett., 20, 363–366, 1993. Massie, S., Gettelman, A., Randel, W., and Baumgardner, D.: Distribution of tropical cirrus in relation to convection, J. Geophys. Res., 107(D21), 4591, doi:10.1029/2001JD001293, 2002. McFarquhar, G. M. and Heymsfield, A. J.: Microphysical characteristics of three anvils sampled during the Central Equatorial Pacific Experiment, J. Atmos. Sci.,53, 2401–2423, 1996. Morcrette, J. J., Clough, S. A., Mlawer, E. J., and Iacono, M. J.: Impact of a validated radiative transfer scheme, RRTM, on the ECMWF model climate and 10-day forecasts. ECMWF Technical Memo., 252, 1998. % %Mullendore G.L., D.R. Durran, Holton J.R.: Cross.tropopause tracer transport in midlatitude convection, J. Geophys. Res., 116, D06113, doi:10.129/2004JD005059, 2005 Noel, V., Winker, D. M., McGill, M., and Lawson P.:Classification of particle shapes from lidar depolarization ratio in convective ice clouds compared to in situ observations during CRYSTAL-FACE, J. Geophys. Res., 109, D24213, doi:10.1029/2004JD004883, 2004. Pfister, L., Selkirk, H. B., Jensen, E. J., et al.: Aircraft observations of thin cirrus clouds near the tropical tropopause, J. Geophys. Res., 106(D9), 9765–9786, 2001. Pommereau, J.-P., Garnier, A., Held, G., Gomes, A.-M., Goutail, F., Durry, G., Borchi, F., Hauchecorne, A., Montoux, N., Cocquerez, P., Letrenne, G., Vial, F., Hertzog, A., Legras, B., Pisso, I., Pyle, J. A., Harris, N. R. P., Jones, R. L., Robinson, A., Hansford, G., Eden, L., Gardiner, T., Swann, N., Knudsen, B., Larsen, N., Nielsen, J., Christensen, T., Cairo, F., Pirre, M., Marécal, V., Huret, N., Riviére, E., Coe, H., Grosvenor, D., Edvarsen, K., Di Donfrancesco, G., Ricaud, P., Berthelier, J.-J., Godefroy, M., Seran, E., Longo, K., and Freitas, S.: An overview of the HIBISCUS campaign, Atmos. Chem. Phys. Discuss., 7, 2389–2475, 2007. Pressman, D. J.: Chislennaja model' gidrotermicheskikh processov v pochve kak chast' skhemy mezomasshtabnogo prognoza (A numerical model of hydrothermical processes in soil as a part of a mesoscale weather forecast scheme), Meteorologiya i gidrologiya (Meteorology and Hydrology), 11, 62–75, 1994 (in Russian). Ren, C., MacKenzie, A. R., Schiller, C., Shur, G., and Yushkov, V.: Diagnosis of processes controlling water vapour in the tropical tropopause layer by a Lagrangian cirrus model, Atmos. Chem. Phys., 7, 5401–5413, 2007. Ritter, B. and Geleyn, J.: A comprehensive radiation scheme for numerical weather prediction models with potential applications in climate simulations, Mon. Wea. Rev., 120, 303–325, 1992. Sassen, K. and Benson, S.: A Midlatitude Cirrus Cloud Climatology from the Facility for Atmospheric Remote Sensing. Part II: Microphysical Properties Derived from Lidar Depolarization, Journal of Atmospheric Sciences, 58, 2103–2112, 2001. Saunders, R. and Brunel, P.: RTTOV 8.5 user guide, EUMETSAT SAFNWP http://www.metoffice.gv.uk/research/interproj/nwpsaf/rtm/, 2004. Schultz, P.: An explicit cloud physics parameterization for operational numerical weather prediction, Mon. Wea. Rev, 123, 3331–3343, 1995. Shibata T., Voemel H., Hamdi S., Kaloka S., Hasebe F., Fujiwara M., and Shiotani M.: Tropical cirrus near cold point tropopause under ice supersaturated condition observed by lidar and balloon-borne cryogenic frost point hygrometer, J. Geophys. Res., 112, D03210, doi:10.1029/2006JD007631, 2007. % %Stohl, A., Haimberger L., Scheele M.P., Wernli H.: An intercomparison of results from three %trajectory models, Meteorol. Applications, 127–135, 1999 Tompkins A. M., Gierens, K., and Radel G.: Ice Supersaturation in the ECMWF Integrated Forecast System, ECMWF technical memorandum, 481, 2005. Wang, P. H., Minnis, P., McCormick, M. P., Kent, G. S., and Skeens, K. M.: A 6-year climatology of cloud occurence frequency from Stratospheric Aerosol and Gas Experiment II observations (1985–1990), J. Geophys. Res., 101, 29 407–29 429, 1996. Whiteway, J., Cook, C., Gallagher, M., et al.: Anatomy of cirrus clouds: Results from the Emerald airborne campaigns, Geophys. Res. Lett., 31, L24102, doi:10.1029/2004GL021201, 2004. Zampieri, M., Buzzi A., and Malguzzi, P.: Sensitivity of quantitative precipitation forecasts to boundary layer parameterization: a flash flood case study in the Western Mediterranean, Nat. Hazards Earth Syst. Sci., 5, 603–612, 2005.