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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.

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Presentation on theme: "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."— Presentation transcript:

1 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 Université de Liège Belgium www.co2.ulg.ac.be CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/

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/

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

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

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

6 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Tasmania Borges et al. (2008) BG 5:141–155 SAM + Wind – SST + pCO 2 – SAM + Wind – SST + pCO 2 – SAM + Wind – SST + pCO 2 –

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 5:141–155

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 5:141–155

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 µatm max. Year-to-year change 200 µatm max.

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 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 µatm Year-to-year change 220 µatm

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

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 CO 2 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 CO 2 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/ Open oceanCoastal ocean Large scale oscillations Land Conclusions

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

18 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations CO 2 Land Conclusions physicsbiology ΔDI C

19 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations CO 2 Land Conclusions physicsbiology ΔDI C

20 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations CO 2 Land Conclusions physicsbiology ΔDI C

21 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations CO 2 Land Conclusions physicsbiology ΔDI C

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 ΔDI C

23 CARBOOCEAN Bergen, 5-9 October 2009 http://www.co2.ulg.ac.be/ Open oceanCoastal ocean Large scale oscillations ΔDI C CO 2 ΔDI C CO 2 Land Conclusions physicsbiology physicsbiology

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 ?"

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

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 CO 2 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 CO 2 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/ Open oceanCoastal ocean Large scale oscillations ΔDI C CO 2 ΔDI C CO 2 Land Conclusions physicsbiology physicsbiology

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