GRAPHICS FOR SANDY CYCLONE WORKSHOP PRESENTATION

Philippe Papin

Sandy Pre 2nd Trough Interaction

Strong Inner CoreWeak Outer Wind Core

Strong PV GradientWeak PV Gradient

Weak Mid Level Vortex

Strong Mid Level Vortex

PV Tower

350 K Trough Axis

Sandy Post 2nd Trough Interaction

Outer Wind Core Dominant

Broader PV Gradient

Mid-Level Vortex Merger

350 K PV Hook

Original PV Tower Destroyed

Initial Assessment

• 2nd Trough Interaction– Wind field broadens (as a result of broadening PV

gradient)– Merger of mid-level vortices– Original PV tower associated with TC is destroyed

in favor of a hybrid TC associated with an upper-level PV hook