ReVelle, Douglas O.
M.S. (Master of Science)
Department of Geography
An observational study was carried out during the Winter and Spring seasons of 1991 in an attempt to gain information on mid-latitude nocturnal low-level jets. Seasonal characteristics were analyzed. The source of data for this study included hourly single-pilot balloon launches. In addition, synoptic scale information was available through our campus-based weather office and the PC-MCIDAS, Unidata system. Observational periods were chosen on the basis of a series of quantitative criteria that attempted to ascertain the state of the planetary boundary layer and its ability to generate nocturnal jets locally. Finally, the multi-level nocturnal low-level jet model of ReVelle, Logsdon, and Liu (1990) was utilized to compare the observational data against a theoretical prediction of the planetary boundary layer winds. Theoretical options that were tested were: a) a time- independent barotropic mode, b) a time-dependent barotropic modes with geostrophic winds changing with periods of 17.9 hours (1 local inertial period) and 12 hours, c) a barotropic mode with advection terms, and, d) a baroclinic mode. A detailed quantitative comparison between our observations and theory is presented.
Robinson, Randall J., "The nocturnal low-level jet phenomena : intercomparisons between seasonal observations and theory" (1991). Graduate Research Theses & Dissertations. 6025.
xiii, 175 pages
Northern Illinois University
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