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THREE YEARS OF CO 2 DETERMINATION IN THE EAST ATLANTIC OCEAN

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THREE YEARS OF CO 2 DETERMINATION IN THE EAST ATLANTIC OCEAN M. González-Dávila , J.M. Santana-Casiano and I.R. Ucha Fac. Ciencias del Mar. Universidad de Las Palmas G.C. SPAIN. Feb 2007. Jul 2007. Special thanks go to the Mediterranean Shipping Company MSC-MARTINA, 2005 MSC-GINA, 2006

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slide1
THREE YEARS OF CO2 DETERMINATION

IN THE EAST ATLANTIC OCEAN

M. González-Dávila, J.M. Santana-Casiano and I.R. Ucha

Fac. Ciencias del Mar. Universidad de Las Palmas G.C. SPAIN

slide2
Feb 2007

Jul 2007

Special thanks go to the Mediterranean Shipping Company MSC-MARTINA, 2005

MSC-GINA, 2006

MSC-BENEDETTA, 2007-July 2008

slide3
25

20

15

10

5

N

0

S

5

10

15

CC

NEC

ITCZ Aug

GD

ITCZ Feb

NECC

GC

nSEC

EUC

SECC

EUp

eSEC

SEUC

cSEC

AG

AC

SECC

ABF

After Stramma and Schott, 1999

Jul 2007

slide4
Oct 2007

Feb 2007

SEC

SECC

SEC

SECC

NECC

ITCZ ef.

Cape Verde Up.

Cape Blanc Up.

slide5
fCO2 (matm)

fCO2 (matm)

slide13
IF fCO2(max) corresponds with T(max) (WARMER SEASON) THEN DfCO2 is positive

Following Takahashi et al., 2002

DfCO2 negative: strong biological drawdown, increase of fCO2 due to vertical mixing with low temperature seawater

DfCO2 positive: warm periods fCO2 values greater than the cold ones. Seasonal temperature changes account for more than 50% of the seasonal fCO2 changes

slide14
To remove temperature effect from the observed fCO2, values were normalized to the mean annual T

To remove temperature changes on fCO2, mean annual fCO2 values were perturbated

slide15
Relative importance of the biology and temperature effects

T/B > 1 or (T-B) > 0

Temperature effects exceeds the biology effect

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