Search Results - "Haddad, Z. S."

Derived Observations From Frequently Sampled Microwave Measurements of Precipitation-Part I: Relations to Atmospheric Thermodynamics by Haddad, Z. S., Sy, O. O., Hristova-Veleva, S., Stephens, G. L.

“…This is the first of two papers that quantify the high added value of frequent 3-D radar observations of the atmosphere to capture the dynamics of weather…”
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RETRIEVAL OF LATENT HEATING FROM TRMM MEASUREMENTS by Tao, W.-K., Smith, E. A., Adler, R. F., Haddad, Z. S., Hou, A. Y., Iguchi, T., Kakar, R., Krishnamurti, T. N., Kummerow, C. D., Lang, S., Meneghini, R., Nakamura, K., Nakazawa, T., Okamoto, K., Olson, W. S., Satoh, S., Shige, S., Simpson, J., Takayabu, Y., Tripoli, G. J., Yang, S.

“…Rainfall is a fundamental process within the Earth’s hydrological cycle because it represents a principal forcing term in surface water budgets, while its…”
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A data assimilation technique to account for the nonlinear dependence of scattering microwave observations of precipitation by Haddad, Z. S., Steward, J. L., Tseng, H.-C., Vukicevic, T., Chen, S.-H., Hristova-Veleva, S.

“…Satellite microwave observations of rain, whether from radar or passive radiometers, depend in a very crucial way on the vertical distribution of the condensed…”
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Objective Detection of Indian Summer Monsoon Onset Using QuikSCAT Seawinds Scatterometer by Ragi, A. R., Sharan, Maithili, Haddad, Z. S.

“…Surface winds from the QuikSCAT scatterometer over a region parallel to southern peninsular (SP) India are analyzed to monitor the daily evolution of the…”
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Derived Observations From Frequently Sampled Microwave Measurements of Precipitation. Part II: Sensitivity to Atmospheric Variables and Instrument Parameters by Sy, O. O., Haddad, Z. S., Stephens, G. L., Hristova-Veleva, S.

“…This is the second of two papers that quantify the high added value of frequent 3-D radar observations of the atmosphere to capture the dynamics of weather…”
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Investigation of WRF’s ability to simulate the monsoon-related seasonal variability in the thermodynamics and precipitation over southern peninsular India by Ragi, A.R., Sharan, Maithili, Haddad, Z.S.

“…The goal of this study is to evaluate the ability of the state-of-the-art, higher-resolution, convection-permitting, weather research forecasting (WRF) model…”
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Interpreting millimeter‐wave radiances over tropical convective clouds by Haddad, Z. S., Sawaya, R. C., Kacimi, S., Sy, O. O., Turk, F. J., Steward, J.

“…Attempts to interpret the measurements of millimeter‐wave radiometers over tropical storms must overcome the difficulty of modeling the scattering signatures…”
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Satellite observations of spatial and interannual variability of lightning and radar reflectivity by Durden, S. L., Meagher, J. P., Haddad, Z. S.

“…The authors use satellite data to examine the relationship between lightning and upper-level radar reflectivity. They find correlations between average flash…”
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Objective Characterization of Rain Microphysics: Validating a Scheme Suitable for Weather and Climate Models by Tapiador, F. J., Berne, A., Raupach, T., Navarro, A., Lee, G., Haddad, Z. S.

“…Improving the atmospheric component of hydrological models is beneficial for applications such as water resources assessment and hydropower operations. Within…”
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A new parametrization of the rain drop size distribution by Haddad, Z.S., Short, D.A., Durden, S.L., Im, E., Hensley, S., Grable, M.B., Black, R.A.

“…This paper revisits the problem of finding a parametric form for the rain drop size distribution (DSD) which (1) is an appropriate model for tropical rainfall,…”
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Bayesian estimation of soil parameters from radar backscatter data by Haddad, Z.S., Dubois, P., van Zyl, J.J.

“…Given measurements m/sub 1/,m/sub 2/,...,m/sub J/ representing radar cross-sections of a given resolution element at different polarizations and/or different…”
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ARMAR observations of the melting layer during TOGA COARE by Durden, S.L., Kitlyakara, A., Im, E., Tanner, A.B., Haddad, Z.S., Li, F.K., Wilson, W.J.

“…The NASA/JPL Airborne Rain MApping Radar (ARMAR) was operated on the NASA DC-8 aircraft during TOGA COARE in early 1993. On 12 flights ARMAR observed…”
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To What Extent Can Raindrop Size Be Determined by a Multiple-Frequency Radar? by Meagher, Jonathan P., Haddad, Ziad S.

“…In this paper, an analytical treatment of the atmospheric remote sensing problem of determining the raindrop size distribution (DSD) with a spaceborne…”
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Comparison of TRMM Precipitation Radar and Airborne Radar Data by Durden, S. L., Im, E., Haddad, Z. S., Li, L.

“…The first spaceborne weather radar is the precipitation radar (PR) on the Tropical Rainfall Measuring Mission (TRMM), which was launched in 1997. As part of…”
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Describing the Shape of Raindrop Size Distributions Using Uncorrelated Raindrop Mass Spectrum Parameters by Williams, Christopher R., Bringi, V. N., Carey, Lawrence D., Chandrasekar, V., Gatlin, Patrick N., Haddad, Ziad S., Meneghini, Robert, Munchak, S. Joseph, Nesbitt, Stephen W., Petersen, Walter A., Tanelli, Simone, Tokay, Ali, Wilson, Anna, Wolff, David B.

“…Rainfall retrieval algorithms often assume a gamma-shaped raindrop size distribution (DSD) with three mathematical parametersNw ,Dm , andμ. If only two…”
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Assimilation of DAWN Doppler Wind Lidar Data During the 2017 Convective Processes Experiment (CPEX): Impact on Precipitation and Flow Structure by Hristova-Veleva, Svetla, Zhang, Sara Q, Turk, F Joseph, Haddad, Ziad S, Sawaya, Randy C

“…An improved representation of 3-D air motion and precipitation structure through forecast models and assimilation of observations is vital for improvements in…”
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Improved Coupled Z–R and k–R Relations and the Resulting Ambiguities in the Determination of the Vertical Distribution of Rain from the Radar Backscatter and the Integrated Attenuation by Haddad, Z. S., Jameson, A. R., Im, E., Durden, S. L.

“…Several algorithms to calculate a rain-rate profile from a single-frequency air- or spaceborne radar backscatter profile and a given path-integrated…”
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Parameterizing the Raindrop Size Distribution by Haddad, Ziad S., Durden, Stephen L., Im, Eastwood

“…This paper addresses the problem of finding a parametric form for the raindrop size distribution (DSD) that 1) is an appropriate model for tropical rainfall,…”
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Filtering image records using wavelets and the Zakai equation by Haddad, Z.S., Simanca, S.R.

“…Consider the problem of detecting and localizing a faint object moving in an "essentially stationary" background, using a sequence of 2D low S/N ratio images…”
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Intrinsic Ambiguities in the Retrieval of Rain Rates from Radar Returns at Attenuating Wavelengths by Haddad, Ziad S., Im, Eastwood, Durden, Stephen L.

“…It is well known that there are significant deterministic ambiguities inherent in trying to determine the particular rain-rate profile that produced some given…”
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