The/1sO record of Globigerinoides ruber (white)

• Published in: Paleoceanography
• Main Authors: Wang, L., Sarnthein, M., Duplessy, J.-C., Erlenkeuser, H., Jung, S., Pflaumann, U.
• Other Authors: Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel (CAU), Centre des Faibles Radioactivités, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 1995
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; North Atlantic
• Online Access: https://hal.science/hal-03609207; https://hal.science/hal-03609207/document; https://hal.science/hal-03609207/file/Paleoceanography%20-%20August%201995%20-%20Wang%20-%20Paleo%20sea%20surface%20salinities%20in%20the%20low%E2%80%90latitude%20Atlantic%20The%2018O%20record%20of.pdf; https://doi.org/10.1029/95PA00577

International audience On the basis of the comparison of/5•80 values of Globigerinoides ruber (white) (õ•8Oo.,•r) from modern sediments and measured sea surface temperatures (SST) and salinity (SSS),/5•8Oo.,•rvalues most clearly record summer SST and SSS of the uppermost 50 m of water in the low-latitude Atlantic. A new transfer equation is presented for estimating local summer palco SSS at 0-50 m depth using/5•8Oo. •, palco SST, and the global/5•80 ice effect of sea water, with the standard error reaching :[-0.72-:[-0.77• SSS. The equation was applied to a 35 kyr long /5•80•. ,•.record and palco SST estimates based on planktonic foraminiferal assemblages to reconstruct the palco SSS changes along the east Atlantic margin off the northwest Sahara. The resulting local SSS show a general increase by 0.3-1.4%o during the last glacial maximum (LGM) and large parts of glacial Termination I, suggesting a general increase in the upwelling of the highly saline North Atlantic Central Water and/or a reduced lateral advection of less saline Canary Current water. Two short salinity lows (up to 0.35%0 less than today) during and after the LGM are coeval with the Heinrich meltwater events 1 and 2 in the North Atlantic, indicating the breakdown of coastal upwelling and meltwater advection from the north. Both events are followed by an extreme SSS maximum (38.15%o) along with the restoration of the salinity conveyor belt. At 9.0-5.5 ka the salinity minimum (up to 0.65%0 less than today) reflects the continental runoff linked to the phase of strong North Saharan humidiF during the early Holocene climatic optimum.