Transcript Titel der Präsentation

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
EEA Report – The Alps
Regional climate change
and adaptation –
•
Water-tower of Europe
•
Vital ecosystem services
•
•
„Global climate change ...
„Support monitoring and data
• ... threatens the alpine
collection networks to expand
hydrological system
the knowledge base and widen
drastically.
the scope for in-depth analysis
... may
of• long
dataworsen
series.“current water
resource issues and lead to
increased risk of conflicts.“
•
Need policy guidance (for local
and regional stakeholders) on
robust adaptation strategies.
The Alps facing the challenge of
changing water resources
EEA, Tech Report, 9/2009, 9.9.2009
http://www.eea.europa.eu/publications/alps-climate-change-and-adaptation-200914
EURO4M @ MeteoSchweiz – Christoph Frei and Christian Lukasczyk
2
Alpine Rain-Gauge Networks
APD @ ETH
> 6800 stations
1971-1995
Frei & Schär 1998,
Frei et al. 2006
Compile pan-Alpine rain-gauge dataset:
Alps and adjacent flatland,
high-resolution (all accessible data from national/regional services),
daily, multi-decadal.
EURO4M @ MeteoSchweiz – Christoph Frei and Christian Lukasczyk
3
Gridded Dataset
Schwarb et al. 2001
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.
EURO4M @ MeteoSchweiz – Christoph Frei and Christian Lukasczyk
4
Extreme Events
MeteoSwiss 2006
Floods of the past 50 years
consistent spatial analysis,
for hydrological modelling in trans-boundary catchments (CC impacts)
EURO4M @ MeteoSchweiz – Christoph Frei and Christian Lukasczyk
6
Evaluation
5-year return level of 1-day precipitation (mm, SON)
Frei et al. 2006
Evaluate other precipitation datasets of EURO4M
Updated E-Obs, GPCC, regional RA, downscaling from reg. RA
representation of extremes, decadal-scale variations
EURO4M @ MeteoSchweiz – Christoph Frei and Christian Lukasczyk
7
Uncertainties
Station data
Grid 1
Grid 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)
EURO4M @ MeteoSchweiz – Christoph Frei and Christian Lukasczyk
8
CM-SAF
Dürr et al. 2008, Stöckli R.
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
EURO4M @ MeteoSchweiz – Christoph Frei and Christian Lukasczyk
9
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
EURO4M @ MeteoSchweiz – Christoph Frei and Christian Lukasczyk
10
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.
• …
EURO4M @ MeteoSchweiz – Christoph Frei and Christian Lukasczyk
11
People
Gaudenz Flury
Reto Stöckli
Simon Scherrer
Christoph Frei
Christof Appenzeller
Mark Liniger
12
EURO4M @ MeteoSchweiz – Christoph Frei and Christian Lukasczyk
Christian Jung
Francesco Isotta
Christian Lukasczyk
New!!