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SUMMARY:The Dependence of Tropical Cyclone Pressure Tendency on Size - Ral
 f Toumi (Imperial College London)
DTSTART:20230127T124500Z
DTEND:20230127T134500Z
UID:TALK195139@talks.cam.ac.uk
CONTACT:Paras Vadher
DESCRIPTION:Current theories of tropical cyclone (TC) intensification give
  little direct indication of the role of the TC size in intensity changes\
 , although there are observations showing a relationship. We develop a new
  model of TC central pressure tendency where the pressure change can be ex
 pressed as exponential with a time constant determined by the ratio of rad
 ius maximum wind (Rmax) and the column inflow or outflow speed. An analysi
 s of observations confirms the relationship which becomes more important f
 or a larger pressure tendency and suggests an upper bound on pressure tend
 ency for a given Rmax. The dependence of the pressure tendency on size pos
 es a challenging constraint on the accurate forecasting of TCs in numerica
 l weather prediction and climate models.
LOCATION:LR5
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