Accession Number:
ADA620087
Title:
Departures from Axisymmetric Balance Dynamics during Secondary Eyewall Formation
Descriptive Note:
Journal article
Corporate Author:
NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF METEOROLOGY
Personal Author(s):
Report Date:
2014-10-01
Pagination or Media Count:
18.0
Abstract:
The authors question the widely held view that radial contraction of a secondary eyewall during an eyewall replacement cycle is well understood and governed largely by the classical theory of axisymmetric balance dynamics. The investigation is based on a comparison of the secondary circulation and derived tangential wind tendency between a full-physics simulation and the Sawyer Eliassen balance model. The comparison is made at a time when the full-physics model exhibits radial contraction of the secondary eyewall during a canonical eyewall replacement cycle. It is shown that the Sawyer Eliassen model is unable to capture the phenomenology of secondary eyewall radial contraction because it predicts a net spindown of the boundary layer tangential winds and does not represent the boundary layer spinup mechanism that has been articulated in recent work.
Descriptors:
- *ANGULAR MOMENTUM
- *NUMERICAL ANALYSIS
- *TROPICAL CYCLONES
- *VORTICES
- AXISYMMETRIC FLOW
- AZIMUTH
- BOUNDARY LAYER
- COMPUTERIZED SIMULATION
- HEAT BALANCE
- LOW STRENGTH
- MATHEMATICAL PREDICTION
- MESOSPHERE
- METEOROLOGICAL DATA
- OCEAN CURRENTS
- QUALITATIVE ANALYSIS
- THERMODYNAMIC PROPERTIES
- WEATHER FORECASTING
- WIND VELOCITY
Subject Categories:
- Atmospheric Physics
- Meteorology
- Physical and Dynamic Oceanography