1. Regional Climate Group 1 http://rcg.gvc.gu.se Department of Earth Sciences Influence of climate change on the variation of summer river runoff in Haihe River Basin, China Tinghai Ou

2. Regional Climate Group 2 http://rcg.gvc.gu.se Department of Earth Sciences Study region Population: ~ 10 minlion Water resource per person: ~ 1/6 of China mean ~ 1/24 of world mean

3. Regional Climate Group 3 http://rcg.gvc.gu.se Department of Earth Sciences Reanalysis data sets UCAR/NCAR/CISL/DSS, DOC/NOAA/NWS, MIT/EAPS, GB/MOD/MET, DOC/NOAA/NESDIS/ NCDC, DOD/USNAVY/NRL/MRY & DOC/NOAA/NWS/NCEP (1979) Daily Northern Hemisphere Sea Level Pressure Grids, continuing from 1899, updated monthly. Published by the CISL Data Support Section at the National Center for Atmospheric Research, Boulder, CO (ds010.0) – 1899.1-1939.6 13:00GMT – 1939.7- now 12:00GMT NCEP shum, U wind, V wind, 1000 – 300 hPa

4. Regional Climate Group 4 http://rcg.gvc.gu.se Department of Earth Sciences Time series a) Runoff time series, b) Precipitation time series, c) correlation between…

5. Regional Climate Group 5 http://rcg.gvc.gu.se Department of Earth Sciences Scheme Lamb-Jenkinson circulation classification scheme Lamb weather type

6. Regional Climate Group 6 http://rcg.gvc.gu.se Department of Earth Sciences Mean Precipitation Pattern and water vapor transport Mean daily summer precipitation (mm/day) 1961-2000 mean daily averaged Qu, Qv and DivQ

7. Regional Climate Group 7 http://rcg.gvc.gu.se Department of Earth Sciences Mean circulation pattern, precipitation anomaly and water vapor transport for type A

8. Regional Climate Group 8 http://rcg.gvc.gu.se Department of Earth Sciences Mean circulation pattern, precipitation anomaly and water vapor transport for type C

9. Regional Climate Group 9 http://rcg.gvc.gu.se Department of Earth Sciences Mean circulation pattern, precipitation anomaly and water vapor transport for type E

10. Regional Climate Group 10 http://rcg.gvc.gu.se Department of Earth Sciences Mean circulation pattern, precipitation anomaly and water vapor transport for type S

11. Regional Climate Group 11 http://rcg.gvc.gu.se Department of Earth Sciences Mean circulation pattern, precipitation anomaly and water vapor transport for type W

12. Regional Climate Group 12 http://rcg.gvc.gu.se Department of Earth Sciences Mean circulation pattern, precipitation anomaly and water vapor transport for type SE

13. Regional Climate Group 13 http://rcg.gvc.gu.se Department of Earth Sciences Mean circulation pattern, precipitation anomaly and water vapor transport for type SW

14. Regional Climate Group 14 http://rcg.gvc.gu.se Department of Earth Sciences Simple reconstruction

15. Regional Climate Group 15 http://rcg.gvc.gu.se Department of Earth Sciences

16. Regional Climate Group 16 http://rcg.gvc.gu.se Department of Earth Sciences

17. Regional Climate Group 17 http://rcg.gvc.gu.se Department of Earth Sciences Conclusion Summer river runoff of HRB is more and more directly influenced by the same time precipitation Water vapor from East China Sea to HRB do have influence on the summer precipitation in HRB Westerly wind and verticity play the major influence on summer precipitation in HRB What happened in early 20th?

18. Regional Climate Group 18 http://rcg.gvc.gu.se Department of Earth Sciences