1 / 12

Karol Kuli n ski Marine Chemistry and Biochemistry Department Supervisor: Janusz Pempkowiak

Introductio n Goal Methods Conclusion. Carbon cycling in the Baltic Sea. Karol Kuli n ski Marine Chemistry and Biochemistry Department Supervisor: Janusz Pempkowiak. CARBOOCEAN final meeting Bergen, 5-9.10.2009. Introductio n Goal Methods Conclusion.

shawn
Download Presentation

Karol Kuli n ski Marine Chemistry and Biochemistry Department Supervisor: Janusz Pempkowiak

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. Introduction GoalMethodsConclusion Carbon cycling in the Baltic Sea Karol Kulinski Marine Chemistry and Biochemistry Department Supervisor: Janusz Pempkowiak CARBOOCEAN final meeting Bergen, 5-9.10.2009

  2. IntroductionGoalMethodsConclusion Coastal and marginal seas sink or source of CO2? • Global uptake by the shelf seas 0.33-0.36 Pg C yr-1 • Global emission from estuaries, salt marshes and mangroves -0.50 Pg C yr-1 • (Chen & Borges, 2009) Borges et al., 2006

  3. Introduction GoalMethodsConclusion • The Baltic Sea: • Semi-enclosed shelf sea • Sea surface: 385 000 km2 • Catchment area: 1 700 000 km2 • Water volume: 23 000 km3 • River run-off : 428 km3 • Baltic Sea sink or source of CO2? • 10.8 g C m-2 yr-1 (Thomas et al., 2003) • 36.0 g C m-2 yr-1 (Kuss et al., 2006) • -35.4 g C m-2 yr-1 (Algesten et al., 2006) HELCOM, 2007

  4. Introduction GoalMethodsConclusion Box model Atmosphere Fa Fo North Sea Ff Fi BalticSea Fp Fe Fr Land Fs Fm Sediments ∑inputs = ∑outputs Fi + Fe + Fo + Fa + Ff + Fp + Fr + Fm + Fs = 0 Fa = Fi + Fe + Fo + Ff + Fp + Fr + Fm + Fs Fi – inputfromthe North Sea Fe – output to the North Sea Fo – precipitation Fa – net CO2exchangewithatmophere Ff – fisheries Fp – point sources Fr – riverrun-off Fm – return fluxfromsediments Fs – sedimentation Inputs – positive Outputs - negative

  5. Introduction GoalMethodsConclusion F = C • V F- carbon flux C – carbon concentration V – water volume River run-off Carbon input from rivers is quantified based on the national monitoring programmes data. Database : Period 2003-2008 Monthly means of TOC and TIC concentrations Monthly means water volume 63 the largest rivers 85% of the total water volume from river run-off HELCOM, 2007

  6. Introduction GoalMethodsConclusion CarbonexchangebetweentheBaltic and the North Sea F = C • V F- carbon flux C – carbon concentration V – water volume North Sea • Hydrodynamical model CMOD • Period: VI.2002 – V.2006 • Time resolution: 1 hour • Horizontal resolution: 2 nm • Vertical resolution: 1m Baltic Sea x + y = 1 SalB· x + SalNS· y = SalMod • Parameters: • Water volume • Salinity • Temperature x – Baltic water contribution y – North Sea water contribution

  7. Introduction GoalMethodsConclusion Carbonconcentrationsseasonality DOC extrapolated from the weekly measurements in the near-shore zone. North Sea Baltic Sea DIC Thomas & Schneider, 1999 Baltic Sea North Sea DIC Prowe et al., 2009

  8. Introduction GoalMethodsConclusion Organiccarbondeposition to thesediments Surface of depositional areas and the organic carbon accumulation rates are adopted from: • Algesten et al., 2006 • Emeis et al., 2000 • Christoffersen et al., 2007 • PIG, 2005 • Błaszczyszyn, 1982

  9. Introduction GoalMethodsConclusion Carbon return fluxfromsediments DOC and DIC fluxes from sediments are calculated using Fick’s First Law Ullman & Aller, 1982

  10. Introduction GoalMethodsConclusion River run-off IC: 62% OC: 38% Atmosphere Import fromthe North Sea IC: 95% OC: 5% Fo = 0,57 Fa = -1,08 North Sea Ff = -0,06 Fi = 3,90 Fp = 0,04 Export to the North Sea IC: 83% OC: 17% BalticSea Fe = -11,63 Fr = 10,90 Deposition to thesediments OC: 100% Land Fs = -3,78 Fm = 1,14 Valuesarein Tg C yr-1 Sediments Return fluxfromthesediments IC: 91% OC: 9% Net CO2emission to theatmosphere -2.8 g C m-2 yr-1± 2.1 g C m-2 yr-1

  11. Thank you

  12. IntroductionGoalMethodsConclusion Anthropogenic CO2 emission ~6.5 Pg C yr-1 50% of this is accumulated in the atmosphere ~28-30% ocean uptake ~20-22% land uptake (Emerson & Hedges, 2008; Sabine et al., 2004; Takahashi et al., 2002 & 2009) Chisholm, 2000

More Related