Sonja Murto, PhD student at MISU


Dynamic drivers of the Arctic warm events


This is my first seminar where I will present some of my results during my PhD at MISU. In my research, I look closer at the dynamic drivers behind the Arctic warming by investigating the mechanism and origin of polar anticyclones, identified during 50 warm events of extreme wintertime Arctic surface temperature anomalies. The analysis is based on the ERAInterim-reanalysis dataset. Here, five days backward trajectories originated from anticyclones at 70°N a few days prior to each warm event are used to study this concept and to find general patterns concerning the identified polar anticyclones during these events. To examine and highlight the importance of the diabatic processes involved, meteorological variables, such as potential vorticity and potential temperature, along the trajectories are also interpolated and analyzed. I will shortly explain the method used in this study and present some of the results. Welcome !


Thursday December 13 at 14:45 to 15:15


Rossbysalen C609, Arrhenius laboratory, Svante Arrhenius väg 16C, 6th floor