Planktic foraminifers, oxygen- and carbon isotopic compositions, and radiocarbon age in bottom sediments from Core AMK4-316GC ...

• Main Authors: Barash, Max S, Yushina, Irina G, Spielhagen, Robert F
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2002
• Subjects: Gravity corer; AMK4; Akademik Mstislav Keldysh; Archive of Ocean Data ARCOD; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.762081; https://doi.pangaea.de/10.1594/PANGAEA.762081

In a sediment core AMK4-316 (460 cm long) on the basis of radiocarbon, oxygen isotope, and lithological data climatostratigraphy is established for time interval about 145 ka. The method of factor analysis and spline interpolation applied to data on distribution of planktic foraminifera species has allowed to reconstruct average annual and seasonal temperatures and salinity at the surface and at depth 100 m. The optimum of the Last Interglaciation (5e) is characterized by maximal temperatures, low amplitudes of seasonal fluctuations, and by increased thickness of the upper homogeneous layer. The glacial hydrological mode has arisen here 115 ka ago. Coolings outstripped appropriate events of the global continental glaciation. Minimal average annual temperatures (4-4.5°C) are reconstructed for 47-45, 42, 36, 29-30, and 10 ka. For 50-30 ka interval numerous strong temperature fluctuations that reflect migrations of the polar front are established. Maximal differences of salinity at the surface and depth 100 m ... : Supplement to: Barash, Max S; Yushina, Irina G; Spielhagen, Robert F (2002): Reconstructions of the Quaternary paleohydrological variability by planktonic foraminifers (North Atlantic, Reykjanes Ridge). Translated from Okeanologiya, 2002, 42(5), 744-756, Oceanology, 42(5), 711-722 ...