Effect of seawater carbonate concentration on foraminiferal carbon and oxygen isotopes
Article Abstract:
The 18 O/16 O ratio and 13 C/12 C ratios of the calcite shells of living non-symbiotic and symbiotic plankton foraminifera decline when seawater increases. Standard glacial foraminiferal stable-isotope information does not predict this finding, nor does it support the hypothesis that a transfer of terrestrial carbon into the sea could have produced the glacial-interglacial change in the 13 C/12 C ratio. The extreme stable-isotope differences in the Phanerozoic and Proterozoic aeons may be explained by the carbonate-concentration effect.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
Rapid subtropical North Atlantic salinity oscillations across Dansgaard-Oeschger cycles
Article Abstract:
The way in which rapid reorganizations of the ocean-atmosphere system across the Dangaard-Oeschger cycles are linked to salinity changes in the subtropical North Atlantic gyre are investigated. It is found that increased stadial salinities preconditioned the North Atlantic Ocean for a rapid return to deep overturning circulation and high-latitude warming by contributing to increased North Atlantic surface-water density on interstadial transitions.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
Links between salinity variation in the Caribbean and North Atlantic thermohaline circulation
Article Abstract:
Tropical oceans play a vital role in glacial-interglacial climate transitions. Two Caribbean Sea sediment cores, combining Mg/Ca palaeothermometry with measurements of oxygen isotopes in foraminiferal calcite in order to reconstruct tropical Atlantic surface salinity, is analyzed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Effects of urbanization and habitat fragmentation on bobcats and coyotes in southern California. Effects of Urbanization on the Distribution and Abundance of Amphibians and Invasive Species in Southern California Streams
- Abstracts: Effects of prairie fragmentation on the nest success of breeding birds in the midcontinental United States. Nesting success of a neotropical migrant in a multiple-use, forested landscape
- Abstracts: Assessment of farmer attitudes and behavioral intentions toward bird conservation on organic and conventional Florida farms
- Abstracts: NMDA-receptor mediated, cell-specific integration of neurons in adult dentate gyrus. Enhanced synaptic plasticity in newly generated granule cells of the adult hippocampus
- Abstracts: Evolution of the continental crust. Metal saturation in the upper mantle