AAARG - Arctic and Antarctic Atmospheric Science Research Group

Time 2020-12-30 07:02:38

Web Name: AAARG - Arctic and Antarctic Atmospheric Science Research Group

WebSite: http://arctic.som.ou.edu

ID:150615

Keywords:

and,Antarctic,AAARG,

Description:

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 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. Read more 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 Scientific Titbits Radiative Impact on Tropopause Polar Vortices over the Arctic DOI: 10.1175/MWR-D-11-00182.1 Click here for more

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