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How much (how little) do we know about inter-annual variability of CO 2 in coastal environments? Does it matter ? Can we improve this ?" Alberto V. Borges Chemical Oceanography Unit Universit de Lige Belgium www.co2.ulg.ac.be CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Slide 2 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 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Slide 3 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania Borges et al. (2008) BG 5:141155 SAM + Slide 4 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania Borges et al. (2008) BG 5:141155 SAM + Wind SAM + Wind SAM + Wind Slide 5 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania Borges et al. (2008) BG 5:141155 SAM + Wind SST + SAM + Wind SST + SAM + Wind SST + Slide 6 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania Borges et al. (2008) BG 5:141155 SAM + Wind SST + pCO 2 SAM + Wind SST + pCO 2 SAM + Wind SST + pCO 2 Slide 7 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania SAM + Wind SST + pCO 2 FCO 2 SAM + Wind SST + pCO 2 FCO 2 SAM + Wind SST + pCO 2 FCO 2 Borges et al. (2008) BG 5:141155 Slide 8 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania Warmer years Lesser mixing Lesser DIC Cooler years More mixing More DIC Borges et al. (2008) BG 5:141155 Slide 9 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Celtic Sea & English Channel Deliverable 12.26 Year-to-year change 50 atm max. Year-to-year change 200 atm max. Slide 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 Slide 11 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ North Sea Omar et al. (2009) Ocean Sci. Discuss. 6:1655-1686 Northern BoxSouthern Box Year-to-year change 160 atm Year-to-year change 220 atm Slide 12 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Scheldt estuary Borges (unpublished) pCO 2 (ppm) 7220 ppm4880 ppm 100 ppm210 ppm Slide 13 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Inter-annual drivers Tasmania+mixing Celtic Sea+mixing (?) English Channel++mixing (?) North Sea++biology Scheldt estuary+++nutrient & C river inputs Slide 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 CO 2 in coastal environments? Does it matter ? Can we improve this ?" Slide 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 CO 2 in coastal environments? A little, not much Does it matter ? Can we improve this ?" Slide 16 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations Land Conclusions Slide 17 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations Land Conclusions physicsbiology Slide 18 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations CO 2 Land Conclusions physicsbiology DI C Slide 19 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations CO 2 Land Conclusions physicsbiology DI C Slide 20 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations CO 2 Land Conclusions physicsbiology DI C Slide 21 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations CO 2 Land Conclusions physicsbiology DI C Slide 22 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations CO 2 Land Conclusions physicsbiology physicsbiology DI C Slide 23 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations DI C CO 2 DI C CO 2 Land Conclusions physicsbiology physicsbiology Slide 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 CO 2 in coastal environments? A little, not much Does it matter ? Yes Can we improve this ?" Slide 25 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Conclusions Coastal ocean Tasmania : 10% inter-annual variability of air-sea CO 2 fluxes => Coastal ocean 20% to 24% of the open ocean CO 2 sink North Sea : 50% inter-annual variability of air-sea CO 2 fluxes => Coastal ocean 11% to 33% of the open ocean CO 2 sink Slide 26