Ocean acidification and surface water carbonate production across the Paleocene-Eocene Thermal Maximum

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doi: 10.1016/j.epsl.2010.04.044
Author(s): Gibbs, Samantha J.; Stoll, Heather M.; Bown, Paul R.; Bralower, Timothy J.
Author Affiliation(s): Primary:
National Oceanography Center, School of Ocean and Earth Sciences, Southampton, United Kingdom
University of Massachusetts at Amherst, United States
University College London, United Kingdom
Pennsylvania State University, United States
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, 295(3-4), p.583-592. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. Supplementary data available in online version. 59 refs.; illus., incl. 1 table, sketch map
Summary: The addition of massive amounts of carbon to the ocean-atmosphere system at the Paleocene-Eocene thermal maximum (PETM, ∼55 Ma) caused deep-ocean acidification, evidenced by widespread dissolution of sea floor carbonate sediments. Because of the strong effect of this dissolution on the preserved record of calcium carbonate it has been difficult to evaluate whether changes in surface water chemistry affected carbonate production at the same time. Here, we investigate the production of biogenic carbonate in surface waters by testing a method which combines fossil calcareous nannoplankton counts with taxon-specific Sr/Ca data, an indicator of coccolithophore production. Reconstructed nannoplankton production at Ocean Drilling Program (ODP) Sites 690 (Southern Ocean), 1209 (Pacific Ocean) and Bass River (New Jersey) did not appear to vary significantly across the PETM indicating that on geological timescales there is no evidence for interruption of phytoplankton carbonate production, despite the major assemblage shifts associated with this interval. Either levels of carbonate chemistry change in surface waters were relatively low, perhaps a function of CO2 emission rates, or calcareous nannoplankton were relatively insensitive to these changes compared with their response to other environmental parameters, namely temperature and nutrient availability. Abstract Copyright (2010) Elsevier, B.V.
Year of Publication: 2010
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Acidification; Algae; Alkaline earth metals; Bass River; Calcium; Calcium carbonate; Carbon; Carbon cycle; Carbon dioxide; Carbonates; Cenozoic; Coccolithophoraceae; Geochemical cycle; Leg 113; Leg 198; Marine sediments; Maud Rise; Metals; Microfossils; New Jersey; North Pacific; Northwest Pacific; Nutrients; ODP Site 1209; ODP Site 690; Ocean Drilling Program; Ocean acidification; Pacific Ocean; Paleo-oceanography; Paleocene-Eocene Thermal Maximum; Paleogene; Phytoplankton; Plankton; Plantae; Sea surface water; Sea water; Sediments; Shatsky Rise; Southern Ocean; Sr/Ca; Strontium; Temperature; Tertiary; Trace elements; United States; Weddell Sea; West Pacific
Coordinates: N323900 N324000 E1583100 E1583000
S650938 S650937 E0011218 E0011218
N393000 N393000 W0743000 W0743000
Record ID: 2010082771
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands