1. 6 th Green Ocean Workshop Villefranche sur mer Spring 2007

2. Questions: what are the important feedbacks between marine ecosystems and climate on timescales of 1 yr to 100 kyr? are marine ecosystems stable? are there sensitive regions that we should closely monitor or potentially dangerous climate regimes or human activities that we should carefully avoid?

3. Products of 2006 workshop: EOS workshop report on Modelling interactions between marine ecosystems and climate Definition of 2 priorities: (1) develop a scheme for model evaluation (2) gather observations on rates and biomass

4. 2007 workshop: 40 participants (18 new, 22 returning) 7 phd students

5. planned developments of a Dynamic Green Ocean Model Export 11 PgC/y Respiration 34 PgC/y Primary Production 45 PgC/y pico-heterotrophs monera phyto- plankton pico-autotrophs N 2 -fixers calcifiers DMSp-producers mixed silicifiers zoo- plankton proto meso macro

6. bacteria phytoplanktonzooplankton pico- hetero. pico- autotr. N 2 -fix.calcifiersDMSp- prod. mixed- phyto silicifiersprotomesomacro rates biomass satellite geochem. data available for parameterisation and evaluation (2006)

7. bacteria phytoplanktonzooplankton pico- hetero. pico- autotr. N 2 -fix.calcifiersDMSp- prod. mixed- phyto silicifiersprotomesomacro rates biomass satellite geochem. data available for parameterisation and evaluation (2007) (proposal under review with Euroceans)

8. 2007: warming of the climate system is unequivocal (IPCC)

9. Raupach et al. PNAS CO 2 emissions (GtC/y) 19702005 time (y) 1990 sea level change (cm) temperature change (ºC) Rahmstorf et al. Science

10. 19702005 time (y) 1990 biological changes observed recent past possible future identify potentially dangerous feedbacks due to recent (or projected) climate change

11. Products of 2007 workshop: review progress and revise priorities define steps to move forward on priorities (1)develop a scheme for model evaluation AMERM effort (led by Icarus Alan) model intercomparison with Yasuhiro Yamanaka + (2) gather observations on rates and biomass remineralizers effort (led by Erik Buitenhuis) primary producers effort (led by Shubha Sathyendranath) explore non-linearities in marine ecosystems (led by Dieter Wolf-Gladrow)

13. time evolution of model developments bacteria phytoplanktonzooplankton pico- hetero. pico- autotr. N 2 -fix.calcifiersDMSp- prod. mixed- phyto silicifiersprotomesomacro 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007

14. ... 1991 1996 1999 2001 2002 2003 2004 2005 2006 2007 2010... June: 1 st workshop October, 2 nd workshop October, 3 rd workshop October, 4 th workshop paper in Global Change biology April, 5 th workshop Spring, 6 th workshop initial struggle period }