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Hurricanes: Computerized Weather Prediction Model The hurricane is one of the most dangerous natural hazards to the human society and coastal
 

Summary: Hurricanes: Computerized Weather Prediction Model
The hurricane is one of the most dangerous natural hazards to the human society and coastal
environment. Our prediction and understanding of its track and intensity changes still remain
very limited due to the lack of highresolution observations over the vast tropical oceans where
it is born. Professor DaLin Zhang and his research group at the Department of Atmospheric
and Oceanic Science use a computerized weather prediction model to study the nonlinear
dynamics, the threedimensional structures and evolution as well as the processes leading to
the development of hurricanes. They have shown many interesting dynamics features that have
never been seen before using the computerized model with the finest resolution of 1 km.
The top figure shows the modelproduced double eyewall structures, as indicated by the radar
reflectivity and rotational winds at 1.5 km above the surface, associated with Hurricane Wilma
(2005) in which the lowest central pressure of 882 mb was observed. The bottom figure shows
a vertical cross section through the hurricane eye of the inplane flows in the double eyewalls,
eye, and spiral rainbands. Such results provide much needed information for improving our
understanding of hurricane dynamics, which will in turn help improve our prediction of
hurricane track and intensity in the future.
HYPERLINKS
DaLin Zhang
Numerical Weather Prediction and Data Assimilation
Department of Atmospheric and Oceanic Science

  

Source: Anisimov, Mikhail - Institute for Physical Science and Technology & Department of Chemical Engineering and Biomolecular Engineering, University of Maryland at College Park

 

Collections: Physics; Materials Science