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Federal Department of Home Affairs FDHA Federal Office of Meteorology and Climatology MeteoSwiss High-Resolution Pan-Alpine Precipitation Analysis and.

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Presentation on theme: "Federal Department of Home Affairs FDHA Federal Office of Meteorology and Climatology MeteoSwiss High-Resolution Pan-Alpine Precipitation Analysis and."— Presentation transcript:

1 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

2 2 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. Regional climate change and adaptation – The Alps facing the challenge of changing water resources EEA, Tech Report, 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.

3 3 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 & Schär 1998, Frei et al ETH > 6800 stations

4 4 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

5 5 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

6 6 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

7 7 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

8 8 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)

9 9 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 Dürr et al. 2008, Stöckli R.

10 10 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

11 11 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. …

12 12 MeteoSchweiz – Christoph Frei and Christian Lukasczyk People Christian Lukasczyk Mark Liniger Christoph Frei Gaudenz Flury Christof Appenzeller Reto Stöckli Simon Scherrer Francesco Isotta Christian Jung New!!


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