A study of east-coast cyclogenesis employing quasi-lagrangian diagnostics.

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Author
Conant, Peter R.
Date
1982-06Advisor
Wash, C.H.
Second Reader
Elsberry, Russell L.
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Show full item recordAbstract
The absolute vorticity and angular momentum budgets for the
Presidents' Day Cyclone, 18-19. February 1979 are evaluated employing
the quasi-Lagrangian diagnostic technique in pressure coordinates.
The First GARP Global Experiment (FGGE) Level Ill-b data
set prepared by the European Center for Medium Range Weather
Forecasts is used to define the storm and to calculate the budgets
Important differences are found between the FGGE and mass budget vertical motion estimates. The budget results illustrate
the importance of inward eddy mode lateral transport and advection
at upper levels and mean mode transport due to convergence at
lower levels. The vertical redistribution plays a lesser role
but is more significant in the angular momentum budget. The
vertical vorticity advection and tilting terms are comparable in
magnitude. The largest budget residuals occur during the period
of most intense convective activity which indicates a need for a
better understanding of the vertical redistribution processes.
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