Barite Accumulation rates across Paleocene-Eocene Thermal Maximum (PETM) ...

• Main Authors: Ma, Zhongwu, Gray, E, Thomas, Ellen, Murphy, Brandon, Zachos, James C, Paytan, Adina
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Event label; Latitude of event; Longitude of event; Elevation of event; Sample code/label; DEPTH, sediment/rock; Depth, composite; Depth, composite revised; Barite; AGE; Density, dry bulk; Accumulation rate, mass; Accumulation rate, barium; Drilling/drill rig; DSDP/ODP/IODP sample designation; Leg74; Leg80; Leg113; Leg119; Leg171B; Leg198; Leg199; Leg208; Glomar Challenger; Joides Resolution; Deep Sea Drilling Project DSDP; Ocean Drilling Program ODP; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.856072; https://doi.pangaea.de/10.1594/PANGAEA.856072

Barite accumulation rates (BAR) have been measured from 12 DSDP/ODP site globally (DSDP site 525, 549 and ODP site 690, 738, 1051, 1209, 1215, 1220, 1221, 1263,1265 and 1266A) to reconstruct the export production across Paleocene Eocene Thermal Maximum (PETM) around 55.9 million year ago. Our results suggesting a general increase in export productivity. We propose that changes in marine ecosystems, resulting from high atmospheric partial pressure of CO2 and ocean acidification, led to enhanced carbon export from the photic zone to depth, thereby increasing the efficiency of the biological pump. We estimate that an annual carbon export flux out of the euphotic zone and into the deep ocean waters could have amounted to about 15 Gt during the PETM. About 0.4% of this carbon is expected to have entered the refractory dissolved organic pool, where it could be sequestered from the atmosphere for tens of thousands of years. Our estimates are consistent with the amount of carbon redistribution expected for the ... : Supplement to: Ma, Zhongwu; Gray, E; Thomas, Ellen; Murphy, Brandon; Zachos, James C; Paytan, Adina (2014): Carbon sequestration during the Palaeocene–Eocene Thermal Maximum by an efficient biological pump. Nature Geoscience, 7(5), 382-388 ...