Kuo-Nan Liou

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The National Aeronautics and Space Administration’s Clouds and the Earth’s Radiant Energy System (CERES) Project was designed to improve our understanding of the relationship between clouds and solar and longwave radiation. This is achieved using satellite broad-band instruments to map the top-of-atmosphere radiation fields with coincident data from(More)
A thin cirrus cloud thermal infrared radiative transfer model has been developed for application to cloudy satellite data assimilation. This radiation model was constructed by combining the Optical Path Transmittance (OPTRAN) model, developed for the speedy calculation of transmittances in clear atmospheres, and a thin cirrus cloud parameterization using a(More)
We describe sensitivity studies on the remote sensing of cirrus cloud optical thickness and effective particle size using the National Polar-orbiting Operational Environmental Satellite System Visible/Infrared Imager Radiometer Suite 0.67-, 1.24-, 1.61-, and 2.25-microm reflectances and thermal IR 3.70- and 10.76-microm radiances. To investigate the(More)
[1] A method for detecting and differentiating dust from cirrus using satellite remote sensing has been developed. Using the differences in the reflective and emissive properties of each, it is shown that combining short-wave reflectance ratio tests with long-wave brightness temperature differences produce individual parameters that are able to specifically(More)
[1] The capability of Weather Research and Forecasting (WRF) model in the simulation of cirrus clouds has been examined, with a focus on the effects of radiative processes and vertical model resolution. We incorporate in WRF a new radiation module, referred to as the Fu‐Liou‐Gu scheme, which is an improvement and refinement based on the Fu‐Liou scheme,(More)
[1] An integrated method for the simultaneous detection/ separation of mineral dust and clouds for both daytime and nighttime conditions using MODIS thermal infrared window brightness temperature data has been developed. Based on the spectral variability of dust emissivity at 3.75, 8.6, 11 and 12 mm wavelengths, we combine three heritage approaches to(More)
An approach is presented to estimate the surface aerosol radiative forcing by use of collocated cloud-screened narrowband spectral and thermal-offset-corrected radiometric observations during the Puerto Rico Dust Experiment 2000, South African Fire Atmosphere Research Initiative (SAFARI) 2000, and Aerosol Characterization Experiment-Asia 2001. We show that(More)
Using the data gathered from the Advanced Very High Resolution Radiometer (AVHRR) 0.63 and 3.7 μm channels, an algorithm for the inference of cirrus cloud optical depth and mean effective size has been developed for the first time. This scheme is based on the correlation between the 3.7 μm (total) and 0.63 μm radiances that is constructed from radiative(More)
A methodology for the retrieval of cirrus cloud microphysical and optical properties bas’ed on observations of reflected sunlight is introduced. The retrieval method is based on correlation of the bidirectional reflectance of three channels, 0.65, 1.6, and 2.2 pm, that are available onboard Earth Observing System (EOS) Moderate-Resolution Imaging(More)