Dynamics of Rossby wave initiation in the extratropics and link to sensible surface weather

I investigate the initiation of synoptic-scale Rossby waves and their effect on sensible surface weather. Together with Olivia Romppainen-Martius and Heini Wernli, I have developed an algorithm which identifies Rossby wave initiation (RWI) events in Re-analysis data, based on geometry changes of upper-level jet waveguides. Using this algorithm, we compiled the first climatology of RWI events on the extratropical jet in the Northern Hemisphere (Figure 1). We now use this climatology to study the dynamical mechanisms which lead to RWI and identify key meteorological ingredients for RWI.

Furthermore, my research focuses on how large-amplitude synoptic-scale Rossby waves affect sensible surface weather such as weather extremes and long-lasting hot, cold, dry and wet spells. Together with Stephan Pfahl and Olivia Romppainen-Martius I have analyzed how regional-scale jet waviness modulates the number and geographical distribution of surface weather extremes (Figure 2). Moreover I am interested in how the frequent re-occurrence of transient Rossby wave patterns can lead to persistent surface weather.

For more information please feel free to contact me or have a look at my publications.

2017

18th Cyclone Workshop, St Adle, Canada, 1-6/10/2017
Northern Hemisphere Rossby wave initiation events on the extratropical jet – a climatological analysis, talk

University of Reading, United Kingdom, 27/06/2017
Northern Hemisphere Rossby wave initiation events on the extratropical jet – a climatological Analysis, Seminar talk

NAWDEX workshop, LMU Munich, Germany, 8-10/3/2017
Objectives and flight planning of the NAWDEX TPV-flights, talk

 

 

2016

 

 

15th Swiss Climate Summer School, Grindelwald, Switzerland, 28/08-02/09/2016
Regional-Scale Jet Waviness Modulates the Occurrence of Mid-Latitude Weather Extremes, poster

European Geosciences Union General Assembly, Vienna, Austria, 23-28/04/2016
Detection, Dynamics and Climatology of Rossby Wave Initiation on the Extratropical Waveguide, talk

 

 

2015

 

 

17th Cyclone Workshop, Pacific Grove CA, USA, 25-30/10/2015
An Algorithm for Identifying the Initiation of Synoptic-Scale Rossby Waves on PV Waveguides, talk

14th Swiss Climate Summer School, Ascona, Switzerland, 24-28/08/2015
A Climatology of Synoptic-Scale Rossby Wave Triggering Events,  poster