Radium concentration in water samples from the Northeast Atlantic ...

• Main Authors: Kromer, Bernd, Roether, Wolfgang
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1983
• Subjects: Water sample; CTD/Rosette; M49; M51; M57; Meteor 1964; Northeast Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.604844; https://doi.pangaea.de/10.1594/PANGAEA.604844

We present field measurements of air-sea gas exchange by the radon deficit method that were carried out during JASIN 1978 (NE Atlantic) and FGGE 1979 (Equatorial Atlantic). Both experiments comprised repeated deficit measurements at fixed position over periods of days or longer, using a previously descibed precise and fast-acquiaition, automatic radon measuring system. The deficit time series exhibit variations that only partly reflect the expected changes in gas transfer. By evaluating averages over each time series we deduce the following gas transfer velocities (average wind velocity and water temperature in parentheses):JASIN phase 1: 1.6 ± 0.8 m/d (at ~6 m/s, 13°C)JASIN phase 2: 4.3 ± 1.2 m/d (at ~8 m/s, 13°C)FGGE: 1.2 ± 0.4 m/d (at ~5 m/s, 28°C)0.9 ± 0.4 m/d (at ~7 m/s, 28°C)1.5 ± 0.4 m/d (at ~7 m/s, 28°C)The large difference betwen the JASIN phase 2 and FGGE values despite quite similare average wind velocity becomes even larger when the values are, however, fully compatible with the range of gas ... : Supplement to: Kromer, Bernd; Roether, Wolfgang (1983): Field measurements of air-sea gas exchange by the radon deficit method during JASIN 1978 and FGGE 1979. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe A/B Allgemeines, Physik und Chemie des Meeres, Gebrüder Bornträger, Berlin, Stuttgart, A/B24, 55-76 ...