1 / 21

Surprisingly high anthropogenic CO 2 in the eastern Mediterranean

Surprisingly high anthropogenic CO 2 in the eastern Mediterranean. A. Schneider, T. Tanhua, A. Körtzinger, D.W.R. Wallace. Thermohaline circulation. Meteor 51/2 in 2001. Salinity, Temperature, Oxygen Dissolved inorganic carbon Total alkalinity CFC-12. Thyrranian Sea.

elu
Download Presentation

Surprisingly high anthropogenic CO 2 in the eastern Mediterranean

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Surprisingly high anthropogenic CO2 in the eastern Mediterranean A. Schneider, T. Tanhua, A. Körtzinger, D.W.R. Wallace

  2. Thermohaline circulation

  3. Meteor 51/2 in 2001 • Salinity, Temperature, Oxygen • Dissolved inorganic carbon • Total alkalinity • CFC-12 Thyrranian Sea

  4. Transit time distribution (TTD) CFC-12 concentrations • TTD with a mean age Atmospheric history of CO2 + TTD • Anthropogenic carbon (Cant) Mean age

  5. Results

  6. Total Cant Inventories Mediterranean Sea compared to World Ocean: • 0.3 % of the water volume • 1.1 % of the Cant

  7. Hypothesis Why is the uptake higher? • Low Revelle Factor (9-10) • Deep water formation

  8. Conclusions • CFC-12 and Cant have penetrated the entire water column • High Cant inventories • Deep water formation areas are of great importance • Influence on the global ocean • Measurements in the marginal seas are needed

  9. Flux calculations • Good agreement with Huertas et al. 2009 using the ΔC* method: +4.2 Tg C yr-1 • Aït-Ameur & Goyet using the TrOCA method: opposite flux

  10. Cant Column Inventories from Waugh et al. 2006

  11. Age2 Age3 Age1 Transit time distribution (TTD) Age2 Age3 Age1

  12. Transit time distribution (TTD) • CFC-12 concentrations • atmospheric history • assumptions for saturation and mixing

  13. Transit time distribution (TTD) Mean age

  14. Transit time distribution (TTD) You get: Anthropogenic Carbon (Cant) 120 110 100 90 Anthropogenic CO2 [ppm] 80 70 60 50

  15. Transit time distribution (TTD)

  16. Transit time distribution (TTD)

  17. Mean age = 30 yrs Width = 45 Width = 0.1 Width = 30 Width = 1 Width = 10

  18. Width = 30 Mean age = 30 Width = 15 Mean age = 30

More Related