Accession Number : ADA018905

Title :   Relationships Between Vertical Motion on Isentropic Surfaces from 3-Hr Rawinsonde Data and Radar Echoes.

Descriptive Note : Master's thesis,


Personal Author(s) : Overall,James W.

Report Date : MAY 1975

Pagination or Media Count : 72

Abstract : Vertical motion on isentropic surfaces obtained at 3-h intervals from NASA's second Atmospheric Variability (Pilot) Experiment (AVE IIP) conducted on 11 and 12 May 1974 is related to convection indicated by radar echoes. Temporal and spatial changes in vertical motion are shown and demonstrated to be associated with areas of convection. Vertical motion as large as 22 cm/s was calculated and it is shown that vertical motion changes as much as 20 cm/s in a horizontal distance of 300 km. The rate of change of vertical motion is demonstrated to be as large as 8 cm/s/h from data taken at 3-h intervals while data taken at 12-h intervals the same day displayed a maximum rate of change of 2 cm/s/h. Radar observations confirmed that the intensity of convection varies as a result of the atmospheric variability as detected by 3-h data but is invisible in data taken at 12-h intervals.

Descriptors :   *Convection(Atmospheric), Wind direction, Echo ranging, Vertical orientation, Velocity, Vortices, Height finding, Cyclones, Thunderstorms, Graphs, Charts, Meteorological radar, Radar cross sections, Troposphere, Theses

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE