Dissolved Chlorofluorocarbons in the Water Column

*DATASET-NAME : Inorganic chemistry: dissolved gases in the water column, in Southern Adriatic, Otranto Strait Sea and Ionian Sea.

*TIME-PERIOD : 27 August - 11 September 1997 and 9 - 22 February 1999

*GEOGRAPHIC COVERAGE : Southern Adriatic Sea, Northern Ionian Sea

*PROJECT : MASTIII/MTPII/MATER, MAss Transfer and Ecosystem Response

*PARAMETERS : CFC-11, CFC-12, CFC-113 measurements with quality flag in water column at standard or selected depths.

CODE

NAME

UNIT

ACCURACY

Minimum value

Maximum value

CFC-11

F11

pmol/kg

2.7%

0

4.0

CFC-12

F12

pmol/kg

0.85%

0

2.0

CFC-113

F113

pmol/kg

3.0%

0

1.0

qual

quality flag (3 digit number): digit 1 for CFC11, 2 for CFC12 and 3 for CFC113

 

 

111

999

*INSTRUMENTS : Gas chromatograph with capillary column and electron capture detector.

DESCRIPTION, OBJECTIVES, METHODOLOGY
Offline CFC sampling: 100 ml of sea water are filled into glas ampoules which are flame-sealed with a CFC-free nitrogen headspace. In the laboratory at Bremen are measured with a fully automated gas chromatographic system. The basic design of system consists of a capillary column combined with a low volume trap to achieve full separation of peaks and high resolution. 30 ml of the sample are analyzed. The system is standardly calibrated against gas standards. All concentrations are referenced against the SIO93 scale. Individual errors have been assigned to each measurement. The quality digit assigend to each measurement contains information about the data quality 2=good measurement, 3= questionable measurement, 4=bad measurement, 6=replicate sample.

VOLUME/NUMBER OF PROFILES : 126 values/9 profiles and 94 values/7 profiles

REFERENCES : Bulsiewicz, K. H. Rose, O. Klatt, A. Putzka and W. Roether, A capillary-column chromatographic system for efficient chlorofluorocarbon measurements in ocean water, J. Geophys. Res., Vol. 103, C8, 15959-15970, 1998.

*LABORATORY in charge of chlorofluorocarbon measurements :
University of Bremen, IUP, Fb1
Dept. of Traceroeacongraphy
P.O. Box 330 440
28334 Bremen, Germany

*Responsible Scientist : Dr. Birgit Klein and Dr. Wolfgang Roether
Tel : 49 (0)421 218 2931
Fax : 49 (0)421 2187018
Email : bklein@physik.uni-bremen.de

*STORAGE-MEDIUM : Hard disk.

*AVAILABILITY : Data availability is submitted to the originator permission.
OSSERVATORIO GEOFISICO SPERIMENTALE
Department of Oceanology
PO BOX 2011
IT-34016 TRIESTE
Italy
tel : +39 40 21401

*COMPLETED-BY : Dr. Birgit Klein, UNIVERSITY OF BREMEN-GERMANY

*ENTRY-DATE : 1999-10-12

Available Data Set(s) Processing Level
MAI2 AUG 97 - Dissolved CFCs in the Water Column IN VALIDATION
MAI7 FEB 99 - Dissolved CFCs in the Water Column IN VALIDATION


Last update 12/12/2001

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