In the first part of my PhD I worked on severe wind gusts during the convective season in Switzerland. Specifically I analysed the possibility of retrieving information on gusts at the ground level through the employment of volumetric radar data. Due to the complex topography in Switzerland, lower levels of the atmosphere are often not visible to the radar. This is one factor which makes it difficult to employ Doppler data for wind measurements in Switzerland. Consequently the focus was put on reflectivity data and derivates thereof.

In the second part of my PhD the focus was on the atmospheric conditions that lead to hail events in regions North and South of the Swiss Alps.
The main aim of the project was to attain a better understanding on hail propelling conditions in Switzerland, a region where orography plays a significant role. In detail, an analysis of the regional differences concerning these hail propelling conditions was carried out as well as investigations on the specific atmospheric conditions leading to smaller vs. larger hail and to more or less widespread areas of hailfall.

 

2017

O. Martius, A. M. Hering, M. Kunz, A. Manzato, S. Mohr, L. Nisi and S. Trefalt (2017)
Challenges and recent advances in hail research - A report from the 2nd European Hail Workshop
BAMS, Early Online Releases, http://journals.ametsoc.org/doi/abs/10.1175/BAMS-D-17-0207.1

S. Trefalt, A. Martynov, H. Barras, N. Besic, A. M. Hering, S. Lenggenhager, P. Noti, M. Röthlisberger, S. Schemm, U. Germann and O. Martius (2017)
A multi-data process study of a severe hail storm in complex topography
In preparation

2017

9th European Conference on Severe Storms, Pula, Croatia, 18-22/09/2017
A multi-data process study of a severe hail storm in complex topography, talk

2nd European Hail Workshop, Bern, Switzerland, 19-22/04/2017
6 June 2015 - Multi-data analysis of a severe hail cell in central Switzerland, talk

 

2016

16th EMS Annual Meeting & 11th European Conference on Applied Climatology, Trieste, Italy, 12-16/09/2016
Hail precursors and predictability for regions North and South of the Swiss Alps, talk

6th ISAC-Lecce Summer School on "Advances in Severe Weather Analysis: Models and Observations", Castro Marina, Italy, 20-24/06/2016

 

2015

17th Cyclone Workshop, Pacific Grove CA, USA, 25-30/10/2015
Radar Characteristics and Patterns Related to Convective Wind Gusts in Switzerland, talk

Workshop 'Forecasting Severe Convection I' at European Severe Storms Laboratory, Wiener Neustadt, Austria, 21-25/09/2015

14th Swiss Climate Summer School, Ascona, Switzerland, 24-28/08/2015
Radar Characteristics and Patterns Related to Wind Gusts in Switzerland, poster

 

2014 

EUMETSAT Meteorological Satellite Conference 2014, Geneva, Switzerland, 22–26/09/2014
Using Webcam Imaging to Validate the NWC SAF Cloud Top Temperature Product During Fog and Low Stratus Cloud Conditions over Switzerland, poster

8th European Conference on Radar in Meteorology and Hydrology, Garmisch-Partenkirchen, Germany, 01-05/09/2014        
Wind Gust Information From Operational Radars in Switzerland – A Case Study, poster

1st World Weather Open Science Conference, Montreal, Canada, 16-21/08/2014  
Wind Gust Information From Operational Radars in Switzerland – A Case Study, poster
Nowcasting of North Foehn Wind Gusts in Switzerland Using AdaBoosting, poster
Using Webcam Imaging to Validate the NWC SAF Cloud Top Temperature Product During Fog and Low Stratus Cloud Conditions over Switzerland, poster