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AAARG
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WELCOME TO AAARG

We are part of School of Meterology at OU. Our group is very committed to
science with research interest which varies from Arctic to Antarctic to
midlatitudes as well as other regions of the globe. Understanding the polar
research is one of the outstanding need of the society today to face future
challenges.
Click on the link to watch a Video On :Introduction to AAARG faculty and
Research overview

AAARG Research Overview Slide






OUR FOCUS AREAS

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TROPOPAUSE POLAR VORTICES

Tropopause Polar Vortices (TPVs) are coherent vortices which occur north and
away from midlatitude jet stream. They are based on tropopause .There are many
motivation to study them is to understand the connection between Arctic, Sea Ice
and TVPS from predictability point of view

ARCTIC CYCLONES

Arctic cyclones are synoptic-scale cyclones that are present poleward of 60N
latitude. The summer is a unique season for Arctic cyclones because they are
more numerous and more frequently generated within the Arctic. They often form
when a TPV moves over the Arctic Frontal Zone or over marginal sea ice regions.
... During the winter, Arctic cyclones are less frequent and most often move
into the Arctic from midlatitudes. Fundamental questions exist regarding Arctic
cyclones, such as their large horizontal scale (reaching up to 5000 km) and long
lifetimes (up to several weeks) that contrasts theory given that the large
planetary vorticity of the high latitudes and is also in contrast to
smaller-scale cyclones that are sometimes observed called polar lows. Past
research has also revealed different viewpoints on the dynamics of these systems
with some studies suggesting that intensifying Arctic cyclones have a sustained
equivalent barotropic structure for extended periods of time with vertical
alignment between the surface low and TPV.

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ANTARCTIC ENSEMBLE DATA ASSIMILATION

Our group utilizes ensemble data assimilation techiques to help build our
understanding of the processes that are represented in numerical models and
improve the capability of numerical weather prediction. The Antarctic is of
particular interest to our group since it is the most data sparse region of the
globe.

SEA ICE

The Arctic is favorable for growth of Tropopause Polar Vortices (TPVs), the
dynamics of TPVs lead to surface cyclones which in turn play a role in dynamics
of Sea ice

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SCIENTIFIC TITBITS

Radiative Impact on Tropopause Polar Vortices over the Arctic
DOI: 10.1175/MWR-D-11-00182.1



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LATEST RESEARCH

Useful weather links and Publication by the Cavallo Group
Publications by Ben Schenkel
Publications by Sam Lillo
Publications and Real time plots by Tomer Burg
Tropical Titbits
Pivotal Weather
Climate Reanalyzer

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