Hyperbaroclinic zones
Subtitle: numerical analysis and application to fronts
By: by R.J. Renard
Contributors: Naval Postgraduate School (U.S.)
Publisher: Naval Postgraduate School
Published: 1970
Place of publication: Monterey, California
Language: eng
Number of pages: 196
Subjects: Fronts (Meteorology); Numerical weather forecasting; Baroclinicity
Description: An objective-numerical scheme for locating and specifying the intensity of hyperbaroclinic zones (HBZs) is presented and applied in both research and operational environments. The operational model, called DGT*, employs the isobaric gradient of virtual potential temperature (T*) to specify baroclinicity while a directional second derivative of T* is the parameter used to locate the HBZs and indirectly give a measure of their intensity. The DGT* model is diagnosed from an analysis of modeled temperature profiles and a number of real-atmosphere temperature fields at 1000, 850, 700, and 500 mb, as taken from winter and summer situations in the years 1964-67. Consideration is given to location, intensity, frequency, slope, and vertical and horizontal distribution and consistency of the HBZs in relation to the numerical processing of data. A key synoptic time, 0000 GMT 6 March 1966, serves to exemplify analytical and diagnostic features of the HBZs. The numerically-analyzed 1000 mb fronts, produced operationally by Fleet Numerical Weather Central, Monterey, California since 1965, are statistically and graphically compared to subjectively-analyzed versions for winter and summer periods up to 30 days. The relation of the HBZ to vertical motion and cloud is illustrated by a case study from December 1966. (Author)
Notes: Title from cover.

"23 March 1970."

"NPS-51RD0031A"--Cover.

DTIC Identifiers: Monterey(California), baroclinicity, fleets(ships), numerical analysis, weather, FNWC(Fleet Numerical Weather Central), stratification, profiles, temperature.

Author(s) key words: Numerical analysis, barclinicity, hyperbarclinicity, fronts, frontal zones, air mass analysis.

Includes bibliographical references (p. 184-189)

"Approved for public release; distribution unlimited"--Cover.

Technical report; 1970.