Transcript Geen diatitel

“Building the daily observations
database for the
European Climate Assessment”
Albert.Klein.Tank @ KNMI.nl
CLARIS meeting, 7 july 2005
Guide:
1.
European Climate Assessment project
2.
Daily observations database
3.
Current activities
4.
Take away messages
Guide:
1.
European Climate Assessment project
2.
Daily observations database
3.
Current activities
4.
Take away messages
The ECA project:


initiated by EUMETNET in 1998; coordinated by KNMI
at present 43 participants (data holding institutions)
from 39 countries (WMO-RA VI)

station data is collated and processed at KNMI

joint report issued in 2002; next report in 2006

results have been used for impact studies (e.g. EEA)
Guide:
1.
European Climate Assessment project
2.
Daily observations database
3.
Current activities
4.
Take away messages
Source: IPCC TAR, Chapter 2
Daily observations database:

at present over 300 station series
(TX,TN,TG, RR starting 1950 or earlier)

same quality control procedures applied to all series

four common homogeneity tests applied to all series

core set of extremes indices calculated


joint paper describing the ECA dataset published in
Int. J. of Climatol, 2002
contribution to GCOS Surface Network and
worldwide analyses of extremes by CLIVAR/WMO
http://eca.knmi.nl


public website presents:
1.
about 75% of the daily series for free download in
ASCII and DODS
2.
all indices results including time series plots and
trend maps
note that all software we used is public domain
(database: MySQL statistics: R web logics: PHP)
Temperature
Precipitation
Source: Wijngaard, Klein Tank and Können, Int. J. of Climatol., 2003
Guide:
1.
European Climate Assessment project
2.
Daily observations database
3.
Current activities
4.
Take away messages
The ECA&D project:

fill gaps & update series using SYNOPs from GTS
(enables monitoring type of products)
1900
2004
interrupted station series
nearby station
blended series
SYNOPs
The ENSEMBLES project:


the daily observations database of ECA is considerably
extended and improved in the ENSEMBLES-EU-FP6
project (ENSEMBLE-based Predictions of Climate
Changes and their Impacts)
a daily gridded dataset is produced for Europe at
20x20 km2 resolution for comparisons with regional
models, impact studies, etc. (due September 2007)
Guide:
1.
European Climate Assessment project
2.
Daily observations database
3.
Current activities
4.
Take away messages
Take away message:
1.
joint work on the data and maintenance is crucial for
success: frequently update series and indices results,
continue data QC and homogeneity analysis
2.
the ECA platform, which is now also used as the basis for
the ENSEMBLES grids, has proven to be suitable for
easy data access, indices calculations, and inclusion of
new monitoring products
3.
CLARIS participants are welcome to use ECA software,
source code, expertise, etc.
htpp://eca.knmi.nl
mailto: Albert.Klein.Tank @ KNMI.nl
the end … questions?