29HE20030408 - 2008-06-17 14:28:40 - version: 0Posted on 2008-06-17 14:28:40 - last updated on 2008-06-17 14:28:40 as version number 0
This file initialized 4/6/07
Data from Rios 4/9/07
Cruise dates: 4/8-4/24/2003
Chief Scientist:A. Rios
Ship and cruise designation:Hesperides 29HE091
EXPOCODE: 29HE20030408
Region:24N
7 full depth stations; with 24 place Rosette
Hydro: Who - A. Rios; Status - final; S Plus - up to date
Notes:
Nuts/O2: Who - C.Castro; Status - final; S Plus -
Notes: estimated O2 error of +/-1umol/kg
Nutrients frozen prior to analysis. Estimated errors:
+/-0.05 umol/kg for nitrate
+/-0.05 umol/kg for silicic acid
+/-0.01 umol/kg for phosphate
Methods see: Hansen and Grasshoff (1983),
Mourino and Fraga, 1985; Alvarez-Salgado et al., 1992
TCO2: Who - R. Wanninkhof; Status - final; S Plus - up to date
Notes: file also contains TCO2 calculated by Rios (tco2calc) using
Mehrbach constants of D&M
TA: Who - A. Rios; Status - final; S Plus - up to date
Notes: potentiometric titrations with hydrochloric acid to
a final pH of 4.40 (Perez and Fraga, 1987).
The electrodes were standardised using a buffer of
pH 4.42 made in CO2 free seawater (Perez et al., 2000)
CRM batch 54 analysis implied uncertainty of +/-0.7 umol kg-1
fCO2: Who - A. rios; Status - final; S Plus - up to date
Notes: surface water only
pH25: Who - A. Rios; Status - final; S Plus - up to date
Notes: SWS@25C
spectrophotometrically following Clayton and Byrne (1993)
CRM batch 54 analysis implied uncertainty of 0.0002
CFC: Who - ; Status - not measured; S Plus -
Notes:
C-14: Who - ; Status - not measured; S Plus -
Notes:
C-13: Who - ; Status - not measured; S Plus -
Notes:
H-3/He-3: Who - ; Status - not measured; S Plus -
Notes:
Other:
References:
Alvarez-Salgado X.A., F. Fraga and F.F. Perez, 1992: Determination of nutrient salts by automatic methods both in seawater and brackish waters: The phosphate blank. Marine Chemistry, 39, 311-319.
Clayton, T.D., R.H. Byrne. 1993. Spectrophotometric seawater pH measurements: total hydrogen ion concentration scale concentration scale calibration of m-cresol purple and at-sea results. Deep-Sea Res. I, Vol. 40, 10, 2115-2129.
Hansen, H.P. and Grasshoff, K. Automated Chemical Analysis. In: K. Grasshoff, M. Ehrhardt and K. Kremlig (Editors), Methods of Seawater Analysis. Verlag Chemie, Weinheim, 419 pp., 1983.
Lueker, T.J., Dickson, A.G., Keeling, C.D., 2000. Ocean pCO2 calculated from dissolved inorganic carbon, alkalinity and equations for K1 and K2: validations based on laboratory measurements of CO2 in gas and seawater at equilibrium. Mar. Chem., 70, 105-119.
Mourino C., F. Fraga, 1985: Determinacion de nitratos en agua de mar. Investigacion Pesquera, 49, 81-96.
Perez, F.F., Fraga, F., 1987. A precise and rapid analytical procedure for alkalinity determination. Marine Chemistry, 21, 169-182.
Perez, F.F., A.F. Rios, T. Rellan, M. Ålvarez. 2000. Improvements in a fast potentiometric seawater alkalinity determination. Ciencias Marinas, 26, 463-478.
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