(Table 2) Abundance of Radiolaria species in sediment samples from Core AMK4-340

• Main Author: Matul, Alexander G
• Format: Dataset
• Language: English
• Published: PANGAEA 1995
• Subjects: Age; dated; radiocarbon; Akademik Mstislav Keldysh; AMK4; AMK4-340GC; Amphimelissa setosa; Archive of Ocean Data; ARCOD; Artostrobium tumidulum; Axoprunum stauraxonium; Counting; Stereo Microscope; Cromyechinus borealis; Cycladophora davisiana; Depth; bottom/max; sediment/rock; top/min; Eucyrtidium acuminatum; GC; Gravity corer; Hymeniastrum euclidis; Lamprocyclas maritalis; Lithelius spiralis; Lithomelissa setosa; Lithomelissa thoracites; Lithomitra arachnea; North Atlantic; Phorticium clevei; Pseudodictyophimus gracilipes; Spongocore puella; Spongodiscus osculosus; Spongotrochus glacialis; Stylatractus pyriformis; Stylochlamidium venustum; Stylodictya validispina; Theocorythium trachelium dianae; Tricolocapsa papillosa mediterranea; Greenland; Reykjanes
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.744983; https://doi.org/10.1594/PANGAEA.744983

Over the past 13 kyr the most significant natural changes in the Reykjanes ridge region took place within 13-7.8 kyr B.P. They resulted from alternating intensifications of the influence of the Labrador (LWM) and Norwegian-Greenland (NGWM) water masses. During 13-11.7 kyr B.P. natural conditions were governed by influence of LWM with sea surface temperature (SST) 3-5°C lower present one. During 11.7-10.3 kyr B.P. NGWM with SST 6-7°C lower present one predominated. During 10.3-9.5 kyr B.P. oceanographic conditions were rapidly transforming and approaching present ones controlled by interaction between LWM and North Atlantic water masses; SST abruptly increased almost to the present value. During 9.5-8.3 kyr B.P. intensification of NGWM led to small decrease of SST (1.5-2.5°C below present value; between 8.3 and 7.8 kyr B.P. natural conditions had approximated present ones and later on remained relatively stable; SST fluctuated with an amplitude of about 1.5°C.