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How much (how little) do we know about inter-annual variability of CO 2 in coastal environments ?

CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/. How much (how little) do we know about inter-annual variability of CO 2 in coastal environments ? D oes it matter ? Can we improve this ?" Alberto V. Borges Chemical Oceanography Unit Université de Liège Belgium

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How much (how little) do we know about inter-annual variability of CO 2 in coastal environments ?

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  1. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ How much (how little) do we know about inter-annual variability of CO2 in coastal environments? Does it matter ? Can we improve this ?" Alberto V. Borges Chemical Oceanography Unit Université de Liège Belgium www.co2.ulg.ac.be

  2. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ • Two achievements of CARBOOCEAN were: • - to encourage sustained C observations in coastal environments • - compilation of large data-set including the coastal realm (SOCAT) • In this presentation : • Tasmania continental shelf • Celtic Sea and English Channel • North Sea • Scheldt estuary

  3. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania SAM + SAM + SAM + Borges et al. (2008) BG 5:141–155

  4. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania SAM + Wind – SAM + Wind – SAM + Wind – Borges et al. (2008) BG 5:141–155

  5. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania SAM + Wind – SST + SAM + Wind – SST + SAM + Wind – SST + Borges et al. (2008) BG 5:141–155

  6. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania SAM + Wind – SST + pCO2– SAM + Wind – SST + pCO2– SAM + Wind – SST + pCO2– Borges et al. (2008) BG 5:141–155

  7. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania SAM + Wind – SST + pCO2– FCO2– SAM + Wind – SST + pCO2– FCO2– SAM + Wind – SST + pCO2– FCO2– Borges et al. (2008) BG 5:141–155

  8. Cooler years More mixing More ↑ DIC Warmer years Lesser mixing Lesser ↑ DIC CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania Borges et al. (2008) BG 5:141–155

  9. Year-to-year change 50 µatm max. Year-to-year change 200 µatm max. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Celtic Sea & English Channel Deliverable 12.26

  10. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ North Sea Omar et al. (2009) Ocean Sci. Discuss. 6:1655-1686

  11. Year-to-year change 160 µatm Year-to-year change 220 µatm CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ North Sea Northern Box Southern Box Omar et al. (2009) Ocean Sci. Discuss. 6:1655-1686

  12. 7220 ppm 4880 ppm 100 ppm 210 ppm pCO2 (ppm) CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Scheldt estuary Borges (unpublished)

  13. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Inter-annual Δ drivers Tasmania + mixing Celtic Sea + mixing (?) English Channel ++ mixing (?) North Sea ++ biology Scheldt estuary +++ nutrient & C river inputs

  14. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions How much (how little) do we know about inter-annual variability of CO2 in coastal environments? Does it matter ? Can we improve this ?"

  15. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions How much (how little) do we know about inter-annual variability of CO2 in coastal environments? A little, not much Does it matter ? Can we improve this ?"

  16. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Large scale oscillations Land Open ocean Coastal ocean

  17. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Large scale oscillations Land physics biology Open ocean Coastal ocean

  18. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Large scale oscillations CO2 Land ΔDIC physics biology Open ocean Coastal ocean

  19. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Large scale oscillations CO2 Land ΔDIC physics biology Open ocean Coastal ocean

  20. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Large scale oscillations CO2 Land ΔDIC physics biology Open ocean Coastal ocean

  21. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Large scale oscillations CO2 Land ΔDIC physics biology Open ocean Coastal ocean

  22. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Large scale oscillations CO2 Land ΔDIC physics biology physics biology Open ocean Coastal ocean

  23. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Large scale oscillations CO2 CO2 Land ΔDIC ΔDIC physics biology physics biology Open ocean Coastal ocean

  24. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions How much (how little) do we know about inter-annual variability of CO2 in coastal environments? A little, not much Does it matter ? Yes Can we improve this ?"

  25. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Coastal ocean Tasmania : ± 10% inter-annual variability of air-sea CO2 fluxes => Coastal ocean 20% to 24% of the open ocean CO2 sink North Sea : ± 50% inter-annual variability of air-sea CO2 fluxes => Coastal ocean 11% to 33% of the open ocean CO2 sink

  26. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions How much (how little) do we know about inter-annual variability of CO2 in coastal environments? A little, not much Does it matter ? Yes Can we improve this ?" Yes we can

  27. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions - Need for sustained observatories of CO2 in coastal environments - Need to develop and maintain QCed and uniform format data-bases that include coastal data (SOCAT) - Describe inter-annual variability and understand underlying mechanisms : - Data synthesis - regional modelling

  28. CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Large scale oscillations CO2 CO2 Land ΔDIC ΔDIC physics biology physics biology Open ocean Coastal ocean

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