Seminars

Lecturer: Maria Mihalikova
Date: 2012-03-29 10:30
Place: Aniara

Case-study of tropopause fold observation by MARA MST radar at Wasa, Antarctica – comparison with ECMWF and WRF model data

Tropopause folds are one of the mechanisms of Stratosphere-Troposphere exchange, which can bring ozone rich stratospheric air to low altitudes. They can be observed in mid–latitudes but also in polar regions of the Northern Hemisphere. With the help of MARA (Moveable Atmospheric Radar for Antarctica) 54.5MHz MST radar, which was operated at the Swedish summer station Wasa in Antarctica (73°S, 13°W) from season 2007 to 2011, and is operated at the Norwegian year-round station Troll (72°S, 2°E) from November 2011, tropopause folds events were observed passing the site of radar in polar regions of Southern Hemisphere. We will present a case study of a tropopause fold observations by MARA from season 2010-2011 together with collocated ozone-sonde measurements. Comparison of observed changes in tropopause height during this tropopause fold events are compared with ECMWF and WRF model data simulations.

Created 2012-02-17 08:42:54 by Uwe Raffalski
Last changed 2012-03-29 17:17:01 by Rick McGregor