WP13: Regional assessment for the Mediterranean Sea Partner 22: University of Perpignan, France Catherine Goyet. CARBOOCEAN.

WP13:WP13: Regional assessment for the Regional assessment for the

Mediterranean SeaMediterranean Sea

Partner 22:Partner 22: University of Perpignan, University of Perpignan,

FranceFranceCatherine Goyet.Catherine Goyet.

CARBOOCEAN

Objective 1 (D13.2, D13.5, D13.6)Objective 1 (D13.2, D13.5, D13.6)

To further create the datasets of the To further create the datasets of the carbonate system propertiescarbonate system properties

Despite a large number of cruises organized throughout Despite a large number of cruises organized throughout the whole Mediterranean Sea during the last century, it is the whole Mediterranean Sea during the last century, it is obvious that the region is particularly poor concerning the obvious that the region is particularly poor concerning the quantity and the quality of data that describe the properties quantity and the quality of data that describe the properties of the carbonate system. Measurements of Aof the carbonate system. Measurements of ATT are old and are old and

of very low precision and there is almost no measurement of very low precision and there is almost no measurement available for Cavailable for CTT. .

This lack of data is striking if we compare the This lack of data is striking if we compare the Mediterranean databases (MEDAR/MEDATLAS II 2002) Mediterranean databases (MEDAR/MEDATLAS II 2002) with those available for the world ocean (WOCE, CARINA).with those available for the world ocean (WOCE, CARINA).

Objective 1 is clearly to fill this gap of knowledge for the Objective 1 is clearly to fill this gap of knowledge for the Mediterranean Sea. Mediterranean Sea.

. EMED-BIOPT Sept/2006

. SARHYGOL Feb-Dec/2001

. SEMANE Jul/2002

. RHOFI Jul/2003

. BOUSSOLE/AOPEX Jul-Aug/2004

.

.Cruises off Alger (ISMAL) 2006

.TSS DYFAMED & SOLA

..

. METEOR 51/2 Oct-Nov 2001

(University of Kiel, Germany)

Dyfamed TSSDyfamed TSS

Touratier F., Aït-Ameur N. and C. Touratier F., Aït-Ameur N. and C. Goyet (2005). Evolution of Goyet (2005). Evolution of anthropogenic CO2 since the 90’s anthropogenic CO2 since the 90’s at the Dyfamed (French-JGOFS) at the Dyfamed (French-JGOFS) Time-Series Station, North Time-Series Station, North Western Mediterranean Sea, Western Mediterranean Sea, GEOITALIA, Spoleto, Italie.GEOITALIA, Spoleto, Italie.

SEMANE July 2002

Objective 2 (D13.12)Objective 2 (D13.12)

To start assessing carbon fluxesTo start assessing carbon fluxes

Aït-Ameur N, Goyet C (2006)Aït-Ameur N, Goyet C (2006). Distribution and transport of natural and anthropogenic . Distribution and transport of natural and anthropogenic COCO22 in the Gulf of Cadiz. in the Gulf of Cadiz. Deep-Sea Research IIDeep-Sea Research II, 53, 1329-1343. , 53, 1329-1343.

Conclusions: Conclusions: the Mediterranean Sea is the Mediterranean Sea is an important sink for C an important sink for Cantant

a source of C a source of Cantant for the Atlantic Ocean for the Atlantic Ocean

Objective 3 (D13.7, D13.8)Objective 3 (D13.7, D13.8)

To assess the concentration of anthropogenic COTo assess the concentration of anthropogenic CO22 (C(Cantant))►►Using the TrOCA Using the TrOCA

method: method: T T2

5-22T

TrOCAant

7.81×107.511- 1.087×1 -A

θ01+1.279 - -2

=1

C

.279

O AC

e

Touratier F, Azouzi L., and C. Goyet (Touratier F, Azouzi L., and C. Goyet (in pressin press). CFC-11, ∆). CFC-11, ∆14C, and C, and 33H tracers as a means to assess anthropogenic COH tracers as a means to assess anthropogenic CO22 concentrations in the ocean, Tellus B.concentrations in the ocean, Tellus B.

WP9 WP9 The simple The simple in situ in situ TrOCA method is one of the 5 approaches used TrOCA method is one of the 5 approaches used for the inter-comparison exercise in the Atlantic Ocean.for the inter-comparison exercise in the Atlantic Ocean.VVázquez-Rodríguez et al.ázquez-Rodríguez et al. ( (in preparationin preparation). Anthropogenic carbon ). Anthropogenic carbon in the Atlantic Ocean: comparison of five data-based calculation in the Atlantic Ocean: comparison of five data-based calculation methods.methods.

►►Using the 3D GHER (university of Liège, Belgium) Using the 3D GHER (university of Liège, Belgium) model of the Mediterranean Sea: model of the Mediterranean Sea:

The coupling with 2 biogeochemical models is now operationel at the The coupling with 2 biogeochemical models is now operationel at the university of Perpignan.university of Perpignan.

AB

A A AB B B

Other CARBOOCEAN contributions from Other CARBOOCEAN contributions from Partner 22Partner 22

PaperPaper – Lee K. et al. (2006). Global relationships of total alkalinity – Lee K. et al. (2006). Global relationships of total alkalinity with salinity and with salinity and temperature in surface waters of the world’s oceans. temperature in surface waters of the world’s oceans. GRL, 33, GRL, 33, doi:10.1029/2006GL027207doi:10.1029/2006GL027207

MeetingMeeting – Goyet C. (2006). Review of various methods to estimate – Goyet C. (2006). Review of various methods to estimate anthropogenic CO2 anthropogenic CO2 in the ocean. CARBOOCEAN WP9 meeting, in the ocean. CARBOOCEAN WP9 meeting, Barcelona, March 2006.Barcelona, March 2006.

– – Touratier F. (2006). Data quality asessment and guidance of Touratier F. (2006). Data quality asessment and guidance of forthcoming forthcoming studies. CARBOOCEAN WP13 meeting, Cadiz, Junestudies. CARBOOCEAN WP13 meeting, Cadiz, June2006.2006.PhDPhD – Aït-Ameur. Processus de séquestration du CO2 anthropique en – Aït-Ameur. Processus de séquestration du CO2 anthropique en Mer Mer Méditerranée et en Mer de Ross. Méditerranée et en Mer de Ross. To be completed in January To be completed in January 20072007..

PosterPoster – Touratier F., Azouzi L., and C. Goyet (2005). Distribution of – Touratier F., Azouzi L., and C. Goyet (2005). Distribution of anthropogenic anthropogenic CO2 in the world ocean using the TrOCA approach. ASLO CO2 in the world ocean using the TrOCA approach. ASLO Summer meeting, Summer meeting, Santiago de Compostela, Santiago de Compostela, June 2005.June 2005.

ReportReport – Taalba A. (2006). Estimation des champs de carbone organique – Taalba A. (2006). Estimation des champs de carbone organique total et total et anthropique en mer Méditerranée. Master report, Université de anthropique en mer Méditerranée. Master report, Université de Perpignan, 26 p.Perpignan, 26 p.

The in situ TrOCA method

AT = ATant + AT

NAT

CT = CTant + CT

NAT

Methods using the preformed values

AT = ATant + AT

0 + ATbio + AT

phys

CT = CTant + CT

0 + CTbio + CT

phys

The link is given by:

ATNAT= AT

0 + ATbio + AT

phys

CTNAT= CT

0 + CTbio + CT

phys

Cant (µmol/kg), ∆C* approach1000 m 2500 m

Cant (µmol/kg), TrOCA approach300 m

1000 m

700 m

2500 m

300 m 700 m

A

BA

Cant (µmol/kg)

Cant (µmol/kg)

TrOCA

∆C*

∆14C (°/oo)

CFC-11 (pmol/kg)

B

Cant (µmol/kg)TrOCA Cant (µmol/kg)

∆C*