1. Regional Climate Group 1 http://rcg.gvc.gu.se Department of Earth Sciences

2. Regional Climate Group 2 http://rcg.gvc.gu.se Department of Earth Sciences Alexander Walther Physical Geographer Ph.D. student climatology Acknowl. supervisors: Prof. Deliang Chen, Hans Linderholm

3. Regional Climate Group 3 http://rcg.gvc.gu.se Department of Earth Sciences Research topics  Climate extremes (Temperature and precipitation) in past/present/future  links to atmospheric circulation  the role played by anthropogenic forcings  Sweden and Europe

4. Regional Climate Group 4 http://rcg.gvc.gu.se Department of Earth Sciences Observations... - precipitation - temperatures - daily - hourly - point measurements with some spatial autocorrelation... and models - precipitation - temperatures -... - daily, hourly, 10-min? - grid averages

5. Regional Climate Group 5 http://rcg.gvc.gu.se Department of Earth Sciences Diurnal variation in precipitation amount and frequency in Sweden Current work Precipitation data in a mountainous catchment in Honduras: quality assessment and spatiotemporal characteristics Westerberg et al. (accepted) Thermal Growing Season (GSL) Walther & Linderholm (2006), Linderholm et al. (2008), Song et al. (2009) Trend Atlas of EMULATE extremes Chen et al. (2006) http://rcg.gvc.gu.se/data

6. Regional Climate Group 6 http://rcg.gvc.gu.se Department of Earth Sciences Diurnal variation in precipitation amount and frequency in Sweden

7. Regional Climate Group 7 http://rcg.gvc.gu.se Department of Earth Sciences observationsmodel

8. Regional Climate Group 8 http://rcg.gvc.gu.se Department of Earth Sciences Spatial scale of extreme precipitation

9. Regional Climate Group 9 http://rcg.gvc.gu.se Department of Earth Sciences GCM44km22km min # of stations Prec 151515 40mm 00218155100 25mm 1527907098 10mm 71456918599.9 5mm 2234749793100 2mm 4558869996100 Cases [%] where interpolated rainfall matches observed rainfall

10. Regional Climate Group 10 http://rcg.gvc.gu.se Department of Earth Sciences Twentieth-century trends in the thermal growing season in the Greater Baltic Area Start End Length GBA Average (1951-2000) -6.3 days +1.1 days +7.4 days

11. Regional Climate Group 11 http://rcg.gvc.gu.se Department of Earth Sciences Trend atlas of the EMULATE indices (Chen et al., 2006) http://rcg.gvc.gu.se

12. Regional Climate Group 12 http://rcg.gvc.gu.se Department of Earth Sciences Tmin Tmax Tmin/Tmax indices. Fraction of positive, positive significant, negative, and negative significant trends for 1901-2000. The areas showing the highest fractions for each index and season are colored. + - + - + - + - percentiles cold warm cold warm cold

13. Regional Climate Group 13 http://rcg.gvc.gu.se Department of Earth Sciences Prec indices: Fraction of positive, positive significant, negative, and negative significant trends for 1901-2000. The areas showing the highest fractions for each index and season are colored. + - + - + - + -

14. Regional Climate Group 14 http://rcg.gvc.gu.se Department of Earth Sciences Ongoing and planned atmospheric circulation mechanisms behind extreme precipitation events When does it rain and why How will precipitation patterns (extremes, diurnal cycle) evolve in the future Do anthropogenic forcing plays a role

15. Regional Climate Group 15 http://rcg.gvc.gu.se Department of Earth Sciences Research topics  Climate extremes (Temperature and precipitation) in past/present/future  links to atmospheric circulation  the role played by anthropogenic forcings  Sweden and Europe

16. Regional Climate Group 16 http://rcg.gvc.gu.se Department of Earth Sciences