Multiple Doppler Radar Derived Vertical Velocities in Thunderstorms PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Multiple Doppler Radar Derived Vertical Velocities in Thunderstorms PDF full book. Access full book title Multiple Doppler Radar Derived Vertical Velocities in Thunderstorms by Stephan P. Nelson. Download full books in PDF and EPUB format.
Author: Stephan P. Nelson
Publisher:
ISBN:
Category : Doppler radar
Languages : en
Pages : 40
Get Book Here
Book Description
Author: Stephan P. Nelson
Publisher:
ISBN:
Category : Doppler radar
Languages : en
Pages : 40
Get Book Here
Book Description
Author: Stephan P. Nelson
Publisher:
ISBN:
Category : Doppler radar
Languages : en
Pages : 21
Get Book Here
Book Description
Author: Michael J. Kraus
Publisher:
ISBN:
Category : Air flow
Languages : en
Pages : 92
Get Book Here
Book Description
Information on airflow in six New England thunderstorms was obtained from quasi-horizontal observations by a single Doppler radar. Radial velocity fields in four of the storms showed well organized patterns throughout an appreciable range of height. Vertical cross sections of the horizontal component field, coupled with some reflectivity information, provided a basis for inferring regions where vertical motion was strong. Computed horizontal flow fields consistent with the observed component fields showed environmental flow basically through the storm except at mid-levels.
Author: Ralph J. Donaldson
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 26
Get Book Here
Book Description
Vertical-incidence observations by Doppler radar of velocities in a thunderstorm reveal some regions in which the spread of velocities is unusually broad. The widths of the vertical velocity spectra are generally greatest along the edges of a major updraft, where the maximum shear in updraft speed also occurs. The observations indicate that turbulence is an important cause of the abnormally wide velocity spectra, and suggest the utility of Doppler radar measurements of the vertical velocity spectrum as an indicator of severe cloudy-air turbulence. Furthermore, vertical velocity spectra in the more convective regions of thunderstorms, where they may be seriously affected by turbulence and wind shear, probably give an exaggerated picture of the particle size distribution. (Author)
Author: Toby N. Carlson
Publisher:
ISBN:
Category : Thunderstorms
Languages : en
Pages : 20
Get Book Here
Book Description
A penetrative flight by a T-33 aircraft was made through a large thunderstorm on 26 July 1960 over northern Arizona. From instruments recording airpla e accel r io, gl of t ck pitc a gle, preci e measure (! f / c) yielded a ver ical velocity every 60 ft of flight path. Calculated velocities differed from the true motions by a constant of integration. Evaluating the constant by alternate procedures produced two velocity distributions, differing from each other by a consta t. (Au hor)AD-28277 0N5 ++Vertical velocities obtained from aircraft accelerometer measur ments in severe thunderstorm.
Author: United States. Federal Aviation Administration. Systems Research and Development Service
Publisher:
ISBN:
Category : Thunderstorms
Languages : en
Pages : 122
Get Book Here
Book Description
Author: Alan R. Bohne
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 68
Get Book Here
Book Description
Theoretical investigations are undertaken to relate intensity of turbulent air motion to Doppler radar spectrum mean and variance in precipitation environments. Examples of theoretical radar derived turbulence power density spectra and total precipitation motion variance show that effects due to imperfect particle response are significant for turbulence scale lengths less than 250 m. Doppler spectrum variance and estimated eddy dissipation rate (epsilon) are found strongly dependent upon precipitation environment for ranges less than about 20 km, and for cases where the turbulence outer scale length (lambda) is less than 0.5 km. They are also found to be essentially independent of lambda when the maximum pulse volume dimension is less than 1/2 lambda, and independent of range but strongly dependent on lambda at ranges where the maximum pulse volume dimension is greater than lambda. Estimation of epsilon by radar is shown to be unreliable until a method of remotely determining lambda is found. Nevertheless, classification of turbulence severity (index = cube root of epsilon is possible with only a reasonable guess of lambda. Analyses of aircraft/gust velocity data indicate that thunderstorm turbulence is localized into discrete patches, and that such localization must be accounted for when aircraft gust velocity data undergo power spectrum analysis.
Author: Ralph J. Donaldson
Publisher:
ISBN:
Category : Doppler radar
Languages : en
Pages : 0
Get Book Here
Book Description
Vertical-incidence observations by Doppler radar of velocities in a thunderstorm reveal some regions in which the spread of velocities is unusually broad. The widths of the vertical velocity spectra are generally greatest along the edges of a major updraft, where the maximum shear in updraft speed also occurs. The observations indicate that turbulence is an important cause of the abnormally wide velocity spectra, and suggest the utility of Doppler radar measurements of the vertical velocity spectrum as an indicator of severe cloudy-air turbulence. Furthermore, vertical velocity spectra in the more convective regions of thunderstorms, where they may be seriously affected by turbulence and wind shear, probably give an exaggerated picture of the particle size distribution. (Author)
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 944
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 556
Get Book Here
Book Description
