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CLEAR AIR TURBULENCE FREQUENCY AS A FUNCTION OF WIND SHEAR AND DEFORMATION
Publisher: American Meteorological Society
Abstract: The probability is determined that an aircraft will encounter moderate or severe high-level turbulence during a 100-mi. flight segment when particular values of certain meteorological quantities exist in that locality. The ...
Objective Computation of Some Meteorological Quantities
Publisher: American Meteorological Society
Abstract: This paper describes research in formulating objective weather analysis and forecasting aids for calculation by an electronic computer. Methods based upon single-station techniques for analysis of rawinsoundings are presented ...
The Feasibility of Measuring Turbulence in the Free Atmosphere from Rising Balloons Tracked by FPS-16 Radar
Publisher: American Meteorological Society
Abstract: On passing through an atmospheric layer that contains random isotropic turbulent eddies, one would expect that a rising balloon would follow an erratic path. Recently, an FPS-16 missile-tracking radar has been used to ...
ON THE ANALYSIS OF CLEAR AIR TURBULENCE BY USE OF RAWINSONDE DATA
Publisher: American Meteorological Society
Abstract: Regions of clear air turbulence in the upper troposphere and lower stratosphere are classified into four groups, and the characteristics of each group are summarized. An empirical turbulence index is defined that describes ...
GEOSTROPHIC AND GRADIENT DEPARTURES IN JET STREAMS
Publisher: American Meteorological Society
Abstract: Wind measurements made by aircraft of Project Jet Stream during forty-eight flights are compared with geostrophic and gradient winds (computed on upper-air charts) in order to determine geostrophic and gradient departures. ...
OBJECTIVE ANALYSIS OF ENVIRONMENTAL CONDITIONS ASSOCIATED WITH SEVERE THUNDERSTORMS AND TORNADOES
Publisher: American Meteorological Society
Abstract: This study describes objective analysis of the atmospheric conditions that precede or accompany severe thunderstorms and tornadoes. The data used are standard rawinsonde observations and hourly surface reports as they are ...
Jet-Stream Structure over the Central United States Determined from Aircraft Observations
Publisher: American Meteorological Society
Abstract: Aircraft observations over the central United States are used to construct empirical models of jet streams that agree well with models based on data from other regions of the mid-latitudes. Individual jet streams conform ...
Empirical Relationships Between Gust Intensity in Clear-Air Turbulence and Certain Meteorological Quantities
Publisher: American Meteorological Society
Abstract: Due to a lack of observational data, little information exists in the literature concerning quantitative relationships between turbulent gust intensity in the free atmosphere and commonly measured meteorological quantities. ...