Results 11 to 20 of about 4,670 (221)

Subvisible cirrus clouds – a dynamical system approach [PDF]

Nonlinear Processes in Geophysics, 2017
Ice clouds, so-called cirrus clouds, occur very frequently in the tropopause region. A special class are subvisible cirrus clouds with an optical depth lower than 0.03, associated with very low ice crystal number concentrations. The dominant pathway
E. J. Spreitzer, E. J. Spreitzer, M. P. Marschalik, M. P. Marschalik, P. Spichtinger   +4 more
doaj   +3 more sources

Anatomy of cirrus clouds

European Space Agency. (Special Publication) ESA SP, 2004
The Emerald airborne measurement campaigns have provided a view of the anatomy of cirrus clouds in both the tropics and mid-latitudes. These experiments have involved two aircraft that probe cirrus clouds from outside and from within. One aircraft, the Egrett, flew within the cloud with instruments for in-situ sampling of ice crystals, humidity, and ...
Whiteway, James A., Cook, Clive, Gallagher, Martin W., Busen, Reinhold, Choularton, Tom W., Bower, Keith, Connolly, Paul, Flynn, Michael, Hacker, Jorg   +8 more
core   +8 more sources

A microphysics guide to cirrus clouds – Part 1: Cirrus types [PDF]

Atmospheric Chemistry and Physics, 2016
Abstract. The microphysical and radiative properties of cirrus clouds continue to be beyond understanding and thus still represent one of the largest uncertainties in the prediction of the Earth's climate (IPCC, 2013). Our study aims to provide a guide to cirrus microphysics, which is compiled from an extensive set of model simulations, covering the ...
M. Krämer, C. Rolf, A. Luebke, A. Luebke, A. Afchine, N. Spelten, A. Costa, J. Meyer, J. Meyer, M. Zöger, J. Smith, R. L. Herman, B. Buchholz, B. Buchholz, V. Ebert, D. Baumgardner, S. Borrmann, M. Klingebiel, M. Klingebiel, L. Avallone, L. Avallone   +20 more
openaire   +8 more sources

On the distribution of relative humidity in cirrus clouds [PDF]

Atmospheric Chemistry and Physics, 2004
We have analysed relative humidity statistics from measurements in cirrus clouds taken unintentionally during the Measurement of OZone by Airbus In-service airCraft project (MOZAIC). The shapes of the in-cloud humidity distributions change from nearly
P. Spichtinger, K. Gierens, H. G. J. Smit, J. Ovarlez, J.-F. Gayet   +4 more
doaj   +11 more sources

Is aerosol formation in cirrus clouds possible? [PDF]

Atmospheric Chemistry and Physics, 2007
The recent observation of ultrafine aerosol particles in cirrus clouds has raised the question whether aerosol formation within cirrus clouds is possible, and if so, what mechanisms are involved.
J. Kazil, J. Kazil, E. R. Lovejoy, E. J. Jensen, D. R. Hanson   +4 more
doaj   +1 more source

Chemistry and Microphysics of Polar Stratospheric Clouds and Cirrus Clouds

Annual Review of Physical Chemistry, 2000
Ice particles found within polar stratospheric clouds (PSCs) and upper tropospheric cirrus clouds can dramatically impact the chemistry and climate of the Earth's atmosphere. The formation of PSCs and the subsequent chemical reactions that occur on their surfaces are key components of the massive ozone hole observed each spring over Antarctica. Cirrus
M A, Zondlo, P K, Hudson, A J, Prenni, M A, Tolbert   +3 more
openaire   +3 more sources

Tropopause and cirrus clouds tops heights [PDF]

, 2010
Abstract: Cirrus clouds have recently garnered much attention due to their important role and impact on the atmospheric radiative balance. This stresses the need for active remote sensing such as lidar, whose capability to perceive high and optically thin cirrus makes it one of the most accurate systems for cirri study. The dynamic range of backscatter
Lakkis, Susan Gabriela, Canziani, Pablo Osvaldo, Lavorato, Mario Blas   +2 more
openaire   +3 more sources

Modelling of cirrus clouds – Part 1b: Structuring cirrus clouds by dynamics [PDF]

Atmospheric Chemistry and Physics, 2009
Abstract. A recently developed and validated bulk microphysics scheme for modelling cirrus clouds (Spichtinger and Gierens, 2009), implemented into the anelastic non-hydrostatic model EULAG is used for investigation of the impact of dynamics on the evolution of an arctic cirrostratus.
Spichtinger, Peter, Gierens, Klaus M.
openaire   +6 more sources

Cirrus Clouds [PDF]

Meteorological Monographs, 2017
Abstract The goal of this chapter is to synthesize information about what is now known about one of the three main types of clouds, cirrus, and to identify areas where more knowledge is needed. Cirrus clouds, composed of ice particles, form in the upper troposphere, where temperatures are generally below −30°C.
Heymsfield, Andrew J., Krämer, Martina, Luebke, Anna, Brown, Phil, Franklin, Charmaine, Lawson, Paul, Lohmann, Ulrike, McFarquhar, Greg, Ulanowski, Zbigniew, Van Tricht, Kristof, Cziczo, Daniel James   +10 more
openaire   +3 more sources

Cirrus clouds in a global climate model with a statistical cirrus cloud scheme [PDF]

Atmospheric Chemistry and Physics, 2009
Abstract. A statistical cirrus cloud scheme that accounts for mesoscale temperature perturbations is implemented into a coupled aerosol and atmospheric circulation model to better represent both cloud fraction and subgrid-scale supersaturation in global climate models.
M. Wang, J. E. Penner
openaire   +3 more sources