National Severe Storms Laboratory

Connecting polar regions processes with midlatitude weather

Dr. Steven Cavallo
OU School of Meteorology

27 January 2015, 4:00 PM

National Weather Center, Room 1313
120 David L. Boren Blvd.
University of Oklahoma
Norman, OK

Refreshments will be served at 3:30 pm

There is relatively little knowledge of the key processes in polar regions that ultimately impact lower-latitude weather. In this talk, I will present the current "state of the polar regions": what we know, what is changing, and what is missing. I will then discuss the polar vortex and its role in the communication between high- and low-latitude air. Finally, I will argue that the time is now ripe for studying the dynamics of sub-synoptic-scale features, where knowledge has historically been limited by data sparsity and inadequate numerical modeling approaches. In particular, I will show that tropopause polar vortices (TPVs) are one such smaller-scale feature that plays potentially important roles in larger-scale weather patterns. That is, knowledge of the mechanisms surrounding TPVs may be crucial in order to improve skillful weather prediction beyond one week.

Speaker bio

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