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Federal Department of Home Affairs FDHA Federal Office of Meteorology and Climatology MeteoSwiss High-Resolution Pan-Alpine Precipitation Analysis and Application MeteoSwiss Contribution to EURO4M Slide 2 2 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk EEA Report The Alps Water-tower of Europe Vital ecosystem services Global climate change...... threatens the alpine hydrological system drastically.... may worsen current water resource issues and lead to increased risk of conflicts. Need policy guidance (for local and regional stakeholders) on robust adaptation strategies. http://www.eea.europa.eu/publications/alps-climate-change-and-adaptation-200914 Regional climate change and adaptation The Alps facing the challenge of changing water resources EEA, Tech Report, 9/2009, 9.9.2009 Support monitoring and data collection networks to expand the knowledge base and widen the scope for in-depth analysis of long data series. Slide 3 3 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk Alpine Rain-Gauge Networks Compile pan-Alpine rain-gauge dataset: Alps and adjacent flatland, high-resolution (all accessible data from national/regional services), daily, multi-decadal. Frei & Schr 1998, Frei et al. 2006 APD @ ETH > 6800 stations 1971-1995 Slide 4 4 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk Gridded Dataset Develop method for gridding km-scale (~ 2x2 km), daily, 1971-recent, building on experience with APD Provide dataset for research preliminary version in month 36. Schwarb et al. 2001 Slide 5 5 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk Climate- and Monitoring Products Frei & Schmidli (2005) 90% - Quantile daily precipitation (mm) Mean maximum annual dry-day period Base-line and climate monitoring information frequency of heavy precipitation and dryness-periods, anomalies Variations over the past 50 years Slide 6 6 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk Extreme Events Floods of the past 50 years consistent spatial analysis, for hydrological modelling in trans-boundary catchments (CC impacts) MeteoSwiss 2006 Slide 7 7 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk Evaluation 5-year return level of 1-day precipitation (mm, SON) Evaluate other precipitation datasets of EURO4M Updated E-Obs, GPCC, regional RA, downscaling from reg. RA representation of extremes, decadal-scale variations Frei et al. 2006 Slide 8 8 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk Uncertainties Station dataGrid 1Grid 2 MeteoSwiss 2008 Addressing errors and uncertainties in gridding products: check for data quality, examine effect of variable observation practice, account for network variations in time, quantify interpolation uncertainties (ensemble gridding) Slide 9 9 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk CM-SAF SEVIRI-based surface solar radiation and cloudiness over Alps optimized Heliosat method, improved cloud/snow discrimination 2004-, daily or better, development ongoing in CM-SAF Drr et al. 2008, Stckli R. Slide 10 10 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk EUMETGRID EUMETGRID: High-resolution gridded datasets & derived products for Europe Merging national gridding products Precip, Temp, Pressure, Snow-cover Use Synergies betw. EURO4M and EUMETGRID: trans-Alpine grids vs. tiled national grids gridding methods for other climate variables derived products and user contacts Slide 11 11 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk Expectations Co-operation / co-ordination with data requests Knowledge exchange on QC and gridding methods Learn potential/limitations of regional reanalyses and remote sensing data. Links to users, share experience on user needs Learn about new climate monitoring products and forms of user/public communication. Slide 12 12 EURO4M @ MeteoSchweiz Christoph Frei and Christian Lukasczyk People Christian Lukasczyk Mark Liniger Christoph Frei Gaudenz Flury Christof Appenzeller Reto Stckli Simon Scherrer Francesco Isotta Christian Jung New!!

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