1. Further Development of GPCC products Global Precipitation Climatology Centre T. Fuchs, U. Schneider, A. Meyer-Christoffer, and B. Rudolf

2. Overview Development of the data base  New precipitation mean climatology so far 28,000 stations, 50,000 stations in the new mean climatology  First Guess and Monitoring Product new analysis technique using the climatology background  Full Data Product beginning 1901 (spatial data coverage higher than ever before)  50-Year Climatology (1951-2000) so far 9,400 data time-series, 15,000 in the new data set Planned reanalyses of all GPCC products Some applications of GPCC products Further Development of GPCC products

3. GPCC data sources Non real-time:  Additional data from ca. 180 countries  International project data (GEWEX-related and other)  Historical data collections (CRU, FAO, GHCN) Near real-time:  GTS SYNOP (DWD RTH Offenbach)  GTS CLIMAT (DWD RTH Offenbach)  GTS CLIMAT (JMA RTH Tokyo)  GTS CLIMAT (UKMO RTH Exeter)  SYNOP-based (NOAA RTH Washington)

4. number of stations per grid monthly precipitation total monthly precipitation anomaly GPCC Products fraction of solid precipitation (%) New from Oct. 2005 on fraction of solid precipitation

5. Database of different GPCC Products (added since Feb. 2005) Development of GPCC data base

6. (added since Feb. 2005) Database of different GPCC Products Development of GPCC data base

7. Increase of the number of station-months and decadal distribution

8. Full Data : 16,002 GHCN+FAO+CRU: 11,615 Development of GPCC data base

9. Full Data : 45,246 GHCN+FAO+CRU: 12,921 Development of GPCC data base

10. Full Data : 23,434 GHCN+FAO+CRU: 3,913 Development of GPCC data base

11. Full Data : 10,460 GHCN+FAO+CRU: 850 Development of GPCC data base

12. Monthly in-situ precipitation stations currently used as basis for anomaly analyses: Total number of stations: 25,642 GPCC Climatological Means Development of GPCC data base

13. Monthly in-situ precipitation stations to be used in future as basis for anomaly analyses: Total number of stations: 50,026 GPCC Climatological Means Development of GPCC data base

14.  Interpolation of climatological means (calendary months) from more than 50,000 stations world-wide - stations are used if at least 10 years of data available - expected to be finished in Nov. 2007  As a follow up: The time-series of monthly gridded worldwide data will be created from anomalies at the stations and the new mean climatology as background map GPCC‘s mean precip climatology

15. GPCC‘s Full Data Product New Full Data Reanalysis (Version 4) optimized for high spatial density and accuracy designed for model verification and calculation of area-means Data base:  8,000 - 45,000 stations using the best of all sources (GTS, countries, CRU, FAO, GHCN) Content:  period Jan. 1901 up to Dec. 2006  grid size 2.5°, 1° and 0.5° lat/lon expected by the end of 2007

16. New VASClimO 50-year Analysis (Version 2) homogeneity checked time-series, designed for studies of climate variability and trends, New VASClimO Analysis Data base:  15,000 selected stations with almost complete time-series  homogeneity tests applied / data homogenized  outliers detected and eliminated Expected by mid of 2008 Content:  period Jan. 1951 up to Dec. 2000 (possibly 2005)  grid size 2.5°, 1° and 0.5° grid

17. GPCC Products and User Applications  Drought monitoring  Assessment of low flow conditions  In situ reference for satellite-gauge combinations  Evaluation / verification of model results  Climate variability analysis and climate monitoring

18. DWD - Abteilung KU4 Hydrometeorologie Sept. 2007 Figures: Accumulated precipitation Outer line: Nov. – July mean 1961-90 Blue colour: Precip Nov. 2004 - July 2005 Yellow colour: precip deficit 2004/05 The 2005 drought in Southern Europe Less rainfall = less clouds & higher radiation if surface/soil wet  higher evaporation  drying soil if surface/soil dry  no more evaporation  no cooling  increasing heat

19. Operational GPCC First Guess Product based application for the „Global Drought Monitor“ of the UCL Hazard Research Center (Web: http://drought.mssl.ucl.ac.uk) GPCC Products and User Applications

20. GPCC First Guess Product based application under development at FAO (Example provided by M. Bernardi, FAO, Rome, 2007) GPCC Products and User Applications

21. GPCP in situ (GPCC Monitoring Product) and multiple satellite combined global monthly precipitation product GPCC Products and User Applications

22. (Source: Richard Müller, DWD/CM-SAF) Verification of ECMWF ERA40 Re-Analysis: Differences GPCC Full Data – ERA40, Period 07 – 12 1998 GPCC Products and User Applications

23. GPCC 50-Year Climatology (VASClimO): Linear trends of annual precipitation for 1951-2000 (used in IPCC WG I FAR) (Source: German Research Project VASClimO, C. Beck, J. Grieser, B. Rudolf, 2005) GPCC Products and User Applications

24. http://gpcc.dwd.de Access to GPCC‘s Precipitation Products

25. http://gpcc.dwd.de Email: gpcc@dwd.de Access to GPCC‘s Precipitation Products