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Cause and cure of the spurious Northward bias induced by hurricane model spinup techniques
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1989
[PDF-662.57 KB]
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Description:"In recent years, one of the techniques used by hurricane forecasting models is to initialize with an axisymmetric vortex. The large scale flow is taken from a conventional analysis or forecast and a symmetric idealized vortex is superimposed upon this flow. Once such a well defined vortex is implanted, the fine mesh, primitive equation model can then forecast the motion of the storm. This paper will attempt to analyse some of the impact such a spinup has upon the model prediction. The questions addressed are basically ones concerning the initialization technique, not the atmosphere or even the model behavior. The arguments are admittedly linear estimates to highly complex processes. The implicit assumption is that, at the very least, the linear effects must be modeled correctly in order to achieve proper performance"--Background, paragraph 1.
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Content Notes:Donald G. Marks.
"This is an unreviewed manuscript, primarily intended for informal exchange of information among NMC staff members."
"May 25,1989."
System requirements: Adobe Acrobat Reader.
Includes bibliographical references.
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Rights Information:Public Domain
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