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Airborne Radar Altimeter Measurements of Geostrophic and Ageostrophic Winds Over Irregular Topography
Publisher: American Meteorological Society
Abstract: Radar altimeter and inertial wind velocity measurements from the NCAR Sabreliner research aircraft are combined with Defense Mapping Agency high-resolution (?1 km) digital terrain height maps to obtain height analyses and ...
The Energy Budget in a Clear Air Turbulence Zone as Observed by Aircraft
Publisher: American Meteorological Society
Abstract: High sample rate aircraft data in a zone of moderate turbulence are analyzed to determine a turbulent energy budget. Combination of the Reynolds stress, buoyancy, and frictional dissipation terms produces a good balance. ...
Further Encounters with Clear Air Turbulence In Research Aircraft
Publisher: American Meteorological Society
Abstract: A series of aircraft penetrations into clear air turbulence zones within upper level fronts is presented. Heat and momentum diffusivities am estimated with a view toward obtaining more realistic parameterizations for ...
Research Aircraft Measurements of Jet Stream Geostrophic and Ageostrophic Winds
Publisher: American Meteorological Society
Abstract: Radar altimeter and inertial navigation wind velocity measurements from research aircraft are shown to give the ageostrophic wind velocity distribution within a jet stream system near the tropopause. Results from one case ...
Observations of a Stationary Mountain Wave and its Associated Momentum Flux and Energy Dissipation
Publisher: American Meteorological Society
Abstract: Analysis is presented of data obtained from instrumented aircraft flying in a mountain wave of moderate amplitude west of Denver, Colo., on 17 February 1970. Emphasis is placed on determination of the downward flux of ...
Aircraft Measurements of Wave Motions within Frontal Zone Systems
Publisher: American Meteorological Society
Abstract: Two direct observations of wave motion associated with fronts by well instrumented meteorological research aircraft are presented. Wave cloud photographs corroborate the analysis of the temperature and three-dimensional ...
Resonance Scattering Detection Using the CSU–CHILL Dual-Wavelength, Dual-Polarization Radar
Publisher: American Meteorological Society
Abstract: AbstractThe CSU?CHILL radar is a dual-wavelength, dual-polarization weather radar system operating at S and X band with coaxial beams. This radar system offers a unique environment to develop and/or validate algorithms ...
Dual-Polarized Radar and Surface Observations of a Winter Graupel Shower with Negative Zdr Column
Publisher: American Meteorological Society
Abstract: omprehensive analysis of an unusual graupel-shower event recorded by an S-band polarimetric radar and two optical-imaging surface instruments is presented. The primary radar characteristic was negative differential ...
Sensitivity of the Biosphere–Atmosphere Transfer Scheme (BATS) to the Inclusion of Variable Soil Characteristics
Publisher: American Meteorological Society
Abstract: The soils data of Wilson and Henderson-Sellers have been incorporated into the land-surface parameterization scheme of the NCAR Community Climate Model after Dickinson. A stand-alone version of this land-surface scheme, ...
A New Dual-Polarization Radar Rainfall Algorithm: Application in Colorado Precipitation Events
Publisher: American Meteorological Society
Abstract: The efficacy of dual-polarization radar for quantitative precipitation estimation (QPE) has been demonstrated in a number of previous studies. Specifically, rainfall retrievals using combinations of reflectivity (Zh), ...
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