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Influence of temperature and CO2 on the strontium and magnesium composition...
Marine calcareous sediments provide a fundamental basis for palaeoceanographic studies aiming to reconstruct past oceanic conditions and understand key biogeochemical element cycles. Calcifying...
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Production of sulphate-rich vapour during the Chicxulub impact and...
The mass extinction event at the Cretaceous/Palaeogene boundary 65.5 Myr ago has been widely attributed to the Chicxulub impact1, 2, but the mechanisms of extinction remain debated1, 3, 4, 5, 6. In the...
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The influence of seawater pH on U / Ca ratios in the scleractinian cold-water...
The increasing pCO2 in seawater is a serious threat for marine calcifiers and alters the biogeochemistry of the ocean. Therefore, the reconstruction of past-seawater properties and their impact on...
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Boron/Calcium in planktonic foraminifera
Climate transitions on recent and geologic timescales are linked to perturbations in atmospheric carbon dioxide concentrations (pCO2). Records of ocean carbonate chemistry allow us to investigate the...
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Environmental controls on the Emiliania huxleyi calcite mass (update)
Although ocean acidification is expected to impact (bio) calcification by decreasing the seawater carbonate ion concentration, [CO32−], there is evidence of nonuniform response of marine calcifying...
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In situ study of boron partitioning between calcite and fluid at different...
The boron isotopic and chemical content of carbonates (expressed as δ11B and B/Ca ratios) have been proposed as proxies for seawater carbonate system parameters. Thermodynamic and kinetic effects on...
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Rapid and sustained surface ocean acidification during the Paleocene-Eocene...
The Paleocene-Eocene Thermal Maximum (PETM) has been associated with the release of several thousands of petagrams of carbon (Pg C) as methane and/or carbon dioxide into the ocean-atmosphere system...
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Uranium in larval shells as a barometer of molluscan ocean acidification...
As the ocean undergoes acidification, marine organisms will become increasingly exposed to reduced pH, yet variability in many coastal settings complicates our ability to accurately estimate pH...
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Acceleration of modern acidification in the South China Sea driven by...
Modern acidification by the uptake of anthropogenic CO2 can profoundly affect the physiology of marine organisms and the structure of ocean ecosystems. Centennial-scale global and regional influences...
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Millennial-scale ocean acidification and late Quaternary decline of cryptic...
Ocean acidification by atmospheric carbon dioxide has increased almost continuously since the last glacial maximum (LGM), 21 000 years ago. It is expected to impair tropical reef development, but...
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Mg/Ca composition of benthic foraminifera Miliolacea as a new tool of...
The Mg/Ca compositions of benthic foraminifera from the superfamily Miliolacea have been studied to explore the use of these high-Mg foraminifera as a proxy for deep ocean conditions. Taxonomic...
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The dynamics of global change at the Paleocene-Eocene thermal maximum: A...
We integrate published stable isotopic, chemical, mineralogical and biotic data from the onset of the Paleocene Eocene thermal maximum (PETM) at Site 690, Maud Rise in the Southern Ocean. The...
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Ocean acidification in the aftermath of the Marinoan glaciation
Boron isotope patterns preserved in cap carbonates deposited in the aftermath of the younger Cryogenian (Marinoan, ca. 635 Ma) glaciation confirm a temporary ocean acidification event on the...
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Biomineralization in bryozoans: present, past and future
Many animal phyla have the physiological ability to produce biomineralized skeletons with functional roles that have been shaped by natural selection for more than 500 million years. Among these are...
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Coccolithophore calcification response to past ocean acidification and...
Anthropogenic carbon dioxide emissions are forcing rapid ocean chemistry changes and causing ocean acidification (OA), which is of particular significance for calcifying organisms, including planktonic...
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Lithium isotopes in foraminifera shells as a novel proxy for the ocean...
Past ocean pH and pCO2 are critical parameters for establishing relationships between Earth’s climate and the carbon cycle. Previous pCO2 estimates are associated with large uncertainties and are...
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The end-Triassic negative δ13C excursion: A lithologic test
The end-Triassic mass extinction is associated with a large negative carbon isotope excursion, which has been interpreted as reflecting the rapid injection of 13C depleted CO2 or methane associated...
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Direct measurement of the boron isotope fractionation factor: Reducing the...
The boron isotopic composition of calcium carbonate skeletons is a promising proxy method for reconstructing paleo-ocean pH and atmospheric CO2 from the geological record. Although the boron isotope...
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Coralline algal Mg-O bond strength as a marine pCO2 proxy
Past ocean acidification recorded in the geological record facilitates the understanding of rates and influences of contemporary pCO2 enrichment. Most pH reconstructions are made using boron, however...
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Red coralline algae assessed as marine pH proxies using 11B MAS NMR
Reconstructing pH from biogenic carbonates using boron isotopic compositions relies on the assumption that only borate, and no boric acid, is present. Red coralline algae are frequently used in...
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