Search Results - "Ulanowski, Z."

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  1. 1

    In situ observations of volcanic ash clouds from the FAAM aircraft during the eruption of Eyjafjallajökull in 2010 by Johnson, Ben, Turnbull, Kate, Brown, Phil, Burgess, Rachel, Dorsey, James, Baran, Anthony J., Webster, Helen, Haywood, Jim, Cotton, Richard, Ulanowski, Z., Hesse, Evelyn, Woolley, Alan, Rosenberg, Philip

    “…During April–May 2010 the UK Facility for Airborne Atmospheric Measurements (FAAM) BAe‐146 aircraft flew 12 flights targeting volcanic ash clouds around the…”
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    Incidence of rough and irregular atmospheric ice particles from Small Ice Detector 3 measurements by Ulanowski, Z, Kaye, P. H, Hirst, E, Greenaway, R. S, Cotton, R. J, Hesse, E, Collier, C. T

    Published in Atmospheric chemistry and physics (12-02-2014)
    “…The knowledge of properties of ice crystals such as size, shape, concavity and roughness is critical in the context of radiative properties of ice and…”
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  3. 3

    The effective density of small ice particles obtained from in situ aircraft observations of mid‐latitude cirrus by Cotton, R. J., Field, P. R., Ulanowski, Z., Kaye, P. H., Hirst, E., Greenaway, R. S., Crawford, I., Crosier, J., Dorsey, J.

    “…The effective ice‐particle density, parametrized through a mass–dimension relation, is widely used in ice microphysical schemes for weather and climate models…”
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  4. 4

    Observations of Saharan dust layer electrification by Nicoll, K A, Harrison, R G, Ulanowski, Z

    Published in Environmental research letters (01-01-2011)
    “…Electrification of atmospheric dust influences the coagulation, wet removal and fall speeds of dust particles. Alignment of dust particles can also occur in…”
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    Self-charging of the Eyjafjallajökull volcanic ash plume by Harrison, R G, Nicoll, K A, Ulanowski, Z, Mather, T A

    Published in Environmental research letters (01-04-2010)
    “…Volcanic plumes generate lightning from the electrification of plume particles. Volcanic plume charging at over 1200km from its source was observed from insitu…”
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    Retrieving the size of particles with rough and complex surfaces from two-dimensional scattering patterns by Ulanowski, Z., Hirst, E., Kaye, P.H., Greenaway, R.

    “…Scattered intensity measurement is a commonly used method for determining the size of small particles. However, it requires calibration and is subject to…”
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  7. 7

    Alignment of atmospheric mineral dust due to electric field by Ulanowski, Z., Bailey, J., Lucas, P. W., Hough, J. H., Hirst, E.

    Published in Atmospheric chemistry and physics (19-12-2007)
    “…Optical polarimetry observations on La Palma, Canary Islands, during a Saharan dust episode show dichroic extinction indicating the presence of vertically…”
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  8. 8

    Polarized optical scattering signatures from biological materials by Martin, W.E., Hesse, E., Hough, J.H., Sparks, W.B., Cockell, C.S., Ulanowski, Z., Germer, T.A., Kaye, P.H.

    “…The polarization of laser light backscattered from biological samples has been measured over the wavelength range 350–850 nm. Incident circular, linearly…”
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    The effect of airborne dust on astronomical polarization measurements by Bailey, Jeremy, Ulanowski, Z., Lucas, P. W., Hough, J. H., Hirst, E., Tamura, M.

    “…In the past, it has generally been assumed that polarization observations made with ground-based telescopes are unaffected by the passage of light through the…”
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    Modelling diffraction by facetted particles by Hesse, E., Macke, A., Havemann, S., Baran, A.J., Ulanowski, Z., Kaye, P.H.

    “…A method to approximate azimuthally resolved light scattering patterns and phase functions due to diffraction and external reflection by strongly absorbing…”
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  11. 11

    Using Global Optimization for a Microparticle Identification Problem with Noisy Data by Bartholomew-Biggs, M. C., Ulanowski, Z. J., Zakovic, S.

    Published in Journal of global optimization (01-07-2005)
    “…We report some experience with optimization methods applied to an inverse light scattering problem for spherical, homogeneous particles. Such particles can be…”
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  12. 12

    Investigation of growth kinetics and morphology of sodium fluorosilicate ice-analogue crystals in solutions and gels by Krasiński, M. J., Krasińska, K. R., Ulanowski, Z.

    Published in Crystal research and technology (1979) (01-12-2007)
    “…The effect of growth method (solution or gel growth) and growth conditions on the morphology of ice analogue crystals (sodium fluorosilicate) has been studied…”
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  13. 13

    Stability characteristics of cylindrical fibres in an electrodynamic balance designed for single particle investigation by Hesse, E., Ulanowski, Z., Kaye, P.H.

    Published in Journal of aerosol science (2002)
    “…An electrodynamic balance (EDB) of the double ring double disc type has been designed for studying single microparticles. It allows electrostatic particle…”
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  14. 14

    Measurement of the charge of airborne 3– 10 μ m spherical dielectric particles charged in an AC unipolar charger by Dalley, J.E.J., Greenaway, R.S., Ulanowski, Z., Hesse, E., Kaye, P.H.

    Published in Journal of aerosol science (2005)
    “…The charges of airborne 3, 5 and 10 μ m spherical dielectric test particles passing through a novel AC unipolar charger have been measured individually. The…”
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  15. 15

    The electrical activity of Saharan dust as perceived from surface electric field observations by Daskalopoulou, Vasiliki, Mallios, Sotirios A, Ulanowski, Zbigniew, Hloupis, George, Gialitaki, Anna, Tsikoudi, Ioanna, Tassis, Konstantinos, Amiridis, Vassilis

    Published in Atmospheric chemistry and physics (25-01-2021)
    “…We report on the electric field variations during Saharan dust advection over two atmospheric remote stations in Greece, using synergistic observations of the…”
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  16. 16

    Halo ratio from ground-based all-sky imaging by Dandini, Paolo, Ulanowski, Zbigniew, Campbell, David, Kaye, Richard

    Published in Atmospheric measurement techniques (28-02-2019)
    “…The halo ratio (HR) is a quantitative measure characterizing the occurrence of the 22∘ halo peak associated with cirrus. We propose to obtain it from an…”
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    Discussion of a physical optics method and its application to absorbing smooth and slightly rough hexagonal prisms by Hesse, E., Taylor, L., Collier, C.T., Penttilä, A., Nousiainen, T., Ulanowski, Z.

    “…•Discussion of Karczewski and Wolf's physical optics (PO) aperture diffraction model.•Study of external diffraction using DDA scattering data for absorbing…”
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  19. 19

    Effects of surface roughness with two scales on light scattering by hexagonal ice crystals large compared to the wavelength: DDA results by Collier, C.T., Hesse, E., Taylor, L., Ulanowski, Z., Penttilä, A., Nousiainen, T.

    “…The effect of ice crystal surface roughness on light scattering by ice crystals which are large compared to the wavelength was studied, in particular changes…”
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