Carbon isotopes, hydrography, and nutrients measured at hydrographic stations from a transatlantic section near 40° N
Cobertura |
MEDIAN LATITUDE: 41.246667 * MEDIAN LONGITUDE: -26.713333 * SOUTH-BOUND LATITUDE: 38.483333 * WEST-BOUND LONGITUDE: -42.933333 * NORTH-BOUND LATITUDE: 43.816667 * EAST-BOUND LONGITUDE: -11.483333 * DATE/TIME START: 1971-06-09T00:00:00 * DATE/TIME END: 1971-06-17T00:00:00 |
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Data(s) |
16/03/1980
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Resumo |
14C concentrations, as well as 14C, hydrographic and nutrient data are reported for 5 hydrographic stations that form a transatlantic section near 40° N ("Meteor" cruise no. 23, 1971). Precision (for 14C ± 0.3 ? or better) and comparability with literature data are specified. A planned intercomparison with the US GEOSECS program within the Newfoundland Basin deep water failed because of variability of water characteristics. The observed 14C values decrease from about Delta 14C = + 80 ? at the surface to -70 ? at 2000 m depth. Deeper down, the values west of the Midatlantic Ridge remain similar, whereas those east of the ridge decrease further, to about - 110 ?. It is shown that bomb-14C is prominent down to about 1500 m depth. Beyond this depth the bomb 14C component is small and is negligible in the eastern basin below 2800 m. On the basis of the 14C-tritium correlation, the distribution of natural 14C below about 1500 m depth is derived from the observations. In the deep and bottom water east of the ridge the 14C-salinity relationship seemingly is non-linear. Contrary to expectation, the 14C concentration in the bottom water is not lower than found on an US GEOSECS station near 10° N. Apparently, lateral concentration differences in the Northeast Atlantic bottom water as well as nonlinearity of the 14C-salinity relationship at 40° N do not exceed 10 ? in Delta 14C. |
Formato |
application/zip, 5 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.604846 doi:10.1594/PANGAEA.604846 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Roether, Wolfgang; Münnich, Karl O; Ribbat, B; Sarmiento, Jorge L (1980): A transatlantic 14C-section near 40°C N. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe A Allgemeines, Physik und Chemie des Meeres, Gebrüder Bornträger, Berlin, Stuttgart, A21, 57-70 |
Palavras-Chave | #14Carbon; 14Carbon, standard deviation; Alkalinity, total; AT; Carbon dioxide, total; d13C DIC; DELC14; DELC14 std dev; delta 13C, dissolved inorganic carbon; Density, sigma-theta (0); DEPTH, water; Depth water; Golf of Cadiz; M23; M23_211; M23_212; M23_213; M23_214; M23_215; Meteor (1964); Nordost-Atlantik-Expedition 1971; O2; Oxygen; Phosphate; PO4; Sal; Salinity; Si(OH)4; Sigma-theta; Silicate; TCO2; Temperature, water, potential; Tpot; Water sample; WS |
Tipo |
Dataset |