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  • Improved determination of cloud-free radiances for oceans

    Creator:
    Burden, Arthur R.
    Abstract:
    Improvements have been made to the spatial coherence method for automatically determining cloud-free ocean radiances in satellite imagery by incorporating the spectral signatures of reflecting surfaces. The spatial coherence method relies on the fact that small-scale cloud-free regions typically exhibit uniform emission and uniform reflection. While small-scale overcast regions typically...
    Resource Type:
    Masters Thesis
    Full Text:
    under the supervision of my advisor, Dr. James Coakley, Jr. Without his support and confidence, I would

  • A complex signal to noise problem : determining the aerosol indirect effect from observations of ship tracks in AVHRR data

    Creator:
    Walsh, Christopher D.
    Abstract:
    Cloud reflectivity is a function of cloud liquid water content and droplet number concentration. Since cloud droplets form around pre-existing aerosol particles, cloud droplet number concentration depends on the availability of particles that can serve as cloud condensation nuclei. Given constant liquid water amount, increased availability of cloud condensation nuclei...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract A James A. Coakley, Jr. Cloud reflectivity/i a function of cloud liquid water content and

  • Modeling and application of multispectral oceanic sun glint observations

    Creator:
    Luderer, Gunnar
    Abstract:
    The atmospheric radiative transfer model MOCARAT was developed and is presented in this thesis. MOCARAT employs a Monte Carlo Technique for the accurate modeling of band radiances and reflectances in an atmospheric system with a ruffled ocean surface as a lower boundary. The atmospheric radiative transfer is modeled with consideration...
    Resource Type:
    Masters Thesis
    Full Text:
    to express my sincere gratitude to Prof. James A. Coakley, Jr. for the opportunity to work in his

  • Biases in droplet radii and optical depths of marine stratocumulus retrieved from MODIS imagery

    Creator:
    Boeke, Robyn C.
    Abstract:
    The 2007 Intergovernmental Panel on Climate Change assessment established that the effect of clouds on climate contributes the largest uncertainty in predicting the future climate. Satellite observations provide an opportunity for learning about the behavior of clouds. This thesis seeks to assess the accuracy of cloud properties retrieved from multispectral...
    Resource Type:
    Masters Thesis
    Full Text:
    from MODIS Imagery. Abstract approved: James A. Coakley, Jr. The 2007

  • Effects of solar heating on the indirect effect of aerosols as deduced from observations of ship tracks

    Creator:
    Christensen, Matthew W.
    Abstract:
    One kilometer Moderate Resolution Imaging Spectroradiometer (MODIS) observations for Terra (morning) and Aqua (afternoon) satellites were used to follow the morning to afternoon evolution of marine stratocumulus clouds that were affected by ship stack exhaust. The observations covered the summer months of 2002-2003 and August 2007 for marine layers off...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ James A. Coakley, Jr. One kilometer Moderate Resolution Imaging Spectroradiometer (MODIS

  • Overestimation of cloud cover in the MODIS cloud product

    Creator:
    Schuetz, Andrea M.
    Abstract:
    The operational processing of MODIS imagery to produce the MOD06 cloud product is based on the assumption that cloudy 1-km pixels are overcast. This assumption is examined using a partly cloudy pixel retrieval scheme, which allows for fractional cloud cover within the 1-km pixels. Cloud flags attached to 250-m MODIS...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ James A. Coakley, Jr. The operational processing of MODIS imagery to produce the MOD06

  • Properties of marine stratus and stratocumulus derived using collocated MODIS and CALIPSO observations

    Creator:
    Hayes, Christopher R.
    Abstract:
    Adiabatic parcel models suggest specific relationships between cloud thickness and cloud properties. Such relationships govern cloud radiative forcing and thus cloud feedbacks in the climate system. Current remote sensing techniques work well at measuring these properties in low-level cloud systems that are overcast. Significant biases exist, however, when measuring cloud...
    Resource Type:
    Masters Thesis
    Full Text:
    MODIS and CALIPSO Observations. Abstract approved: James A. Coakley, Jr

  • Response of marine stratus to successive polluting events by ships

    Creator:
    Sechrist, B.
    Abstract:
    Ship tracks have proven to be an ideal laboratory for studying the response of marine stratocumulus to an increase in aerosol pollution. Here the response of already polluted marine stratocumulus to further pollution was examined by studying the clouds where two ship tracks cross. 78 crossings of ship tracks were...
    Resource Type:
    Masters Thesis
    Full Text:
    . Coakley, Jr. Ship tracks have proven to be an ideal laboratory for studying the response of marine

  • Effects of aerosols on the properties of deep convective clouds

    Creator:
    Brown, Daniel A.
    Abstract:
    Aerosols are tiny particles that serve as nuclei for cloud droplet and ice crystal formation. Increases in aerosol concentration lead to clouds with smaller but more numerous droplets. Some recent studies have found evidence that ice crystal size in deep convective clouds is also reduced by elevated aerosol concentrations. In...
    Resource Type:
    Masters Thesis
    Full Text:
    . Coakley, Jr. Aerosols are tiny particles that serve as nuclei for cloud droplet and ice crystal