We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A Multiscale Analysis of a Case of Slow Growth/Rapid Cyclogenesis During CASP II.
- Authors
Gyakum, John R.; Stewart, Ronald E.
- Abstract
The cyclogenesis of 27 February through 6 March 1992 represents a novel case of rapid intensification and slow growth with substantive planetary-scale signatures. Its evolution, predominately continental, has been documented with the aid of conventional station and grid-point data. Its novel slow growth, yet rapid intensification, is associated with its interaction with two distinct potential vorticity (PV) maxima of differing origins: One travelling from the North Pacific and one associated with an amplifying system in Hudson Bay. The large-scale dynamic and thermodynamic structures are documented throughout its life cycle. Associated with the cyclone's slow-growth process is strong pre-existing surface frontogenetic forcing and strong upper-level ascent forcing throughout the cyclone's unusually long period (48 h) of antecedent spinup prior to the onset of explosive intensification. Its mesoscale structure, documented with the aid of three-hourly soundings, two-minute mesonet data and research aircraft measurements, reveals the presence of a pinched-off warm pool of air that wraps around the system. Additionally, we find a substantive modulation of frontal structure upstream of this warm pool, as the system propagates through eastern Newfoundland during its period of most rapid intensification.
- Subjects
NORTH Pacific Ocean; HUDSON Bay; NEWFOUNDLAND &; Labrador; CYCLONES; THERMODYNAMICS
- Publication
Atmosphere - Ocean (Canadian Meteorological & Oceanographic Society), 1996, Vol 34, Issue 1, p17
- ISSN
0705-5900
- Publication type
Article
- DOI
10.1080/07055900.1996.9649556