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Showing 1 to 12 of 12 for “"hydrometeor"”.
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Microphysical Influences on cold pools
… have investigated the influence of different hydrometeor types upon the formation of the initial cold pool but have reached drastically different conclusions. This study uses CM1 (“Cloud Model 1”), a non-hydrostatic, fully compressible model, to produce a set of simulations in order to …
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Characterization of the role of precipitation in tropical cyclone intensification
… by the latent heat release associated with hydrometeor phase transitions within its ascent branch in the TC inner-core. Disparate paradigms regarding the importance in TC intensification of solely liquid versus combined liquid and frozen hydrometeors have been put forth based upon …
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Toward assessing the effects of aerosols on deep convection: a numerical study using the WRF-Chemistry model
… updraft/downdraft speed, distribution of hydrometeor species, and organizational features, within idealized maritime and continental thermodynamic environments. Initial results were obtained using WRFv3.0.1, and a second series of tests were run using WRFv3.2 after several changes to the …
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Development of a heterogeneous microwave network, fade simulation tool applicable to networks that span Europe
… microwave frequencies are strongly attenuated by hydrometeors such as rain and wet snow (sleet). Hydrometeor attenuation dominates the dynamic fading of most types of radio links operating above 10 GHz, especially high capacity, fixed, terrestrial and Earth-Space links. The International …
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Cross validation of observations from the GPM dual-frequency precipitation radar and dual-polarization S-band ground radars
… products are also evaluated. Results from Hydrometeor classification method by Bechini and Chandrasekar (2015) for ground radars have been extensively used for validating DPR's melting layer detection capability in different types of precipitation system. In this study, a new method …
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A comparison of X-band polarization parameters with in-situ microphysical measurements in the comma head of two winter cyclones
… dual-polarization radar, methods of classifying hydrometeors by type from measured polarization variables have been developed. However, the deterministic approach of existing hydrometeor classification algorithms of assigning only one dominant habit to each volume does not properly consider the …
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The response of moist convection and the atmospheric general circulation to climate warming
… amplified by increases in the mean fall speed of hydrometeors as the atmosphere warms. The hydrometeor fall speed affects precipitation rates by altering a measure of the efficiency with which condensation within the column is converted to precipitation at the surface. The potential relevance of …
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Seasonal and spatial structure of the gravity waves and vertical winds over the central USA derived from the NOAA Profiler Network data
… lowest 3 km of the troposphere, both directly by hydrometeor velocity and indirectly via gravity wave activity produced by convection. We have determined that presence of downward wind velocities with magnitudes larger than 0.25 m/s is the sign of precipitation-affected data. This velocity …
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Dual-Polarization Radar Characteristics of Convection in Hawaii during HERO
… vertical polarization, allowing them to retrieve hydrometeor Characteristics in two dimensions. With this technology, it is possible to gather information about the size, shape and type of hydrometeors. Though the primary purpose of HERO was educational, it provided a unique opportunity to observe …
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Hailfall in a future climate using a pseudo-global warming approach
… in the PGW environments, even with increases in hydrometeor loading. However, only cold-season events showed an increase in hail sizes both within the storm and at the surface, whereas warm-season events saw a decrease in hail sizes at the surface and aloft. Changes in the hailfall area at the …
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Parameterizing PSD assumptions for remote sensing algorithms
… in terms of temperature, relative humidity, and hydrometeor water content. Particle size distribution assumptions within the WRF microphysical schemes are compared to exponential size distributions from both the aircraft and surface distributed 2DVD measurements. Results shows large differences, …
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Assessing the impacts of microphysical and environmental controls on simulated supercell storms
… parameterizations, which typically predict the hydrometeor number concentration and mass mixing ratio. While these double moment schemes are more sophisticated and require fewer a priori parameters than single moment parameterizations, a number of parameter values must still be fixed for …