My current research involves studying the structure of southern hemisphere jet streams. Jets are fast flowing currents of air in the atmosphere which have a peak velocity near the top of the troposphere. They indirectly owe their existence to the rotation of the earth and the fact that the equator receives more heat from the Sun than the poles.
In austral summer the southern hemisphere jet is fairly symmetric around a latitude circle, but in winter it forms a spiral which tightens around Antarctica. I want to understand more about why this pattern forms, what affects it and how it affects different regions in the southern hemisphere.