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Relationship between weights of planktonic foraminifer shell and surface water CO3 = concentration during the Holocene and Last Glacial Period
- Source :
-
Marine Geology . Sep2010, Vol. 275 Issue 1-4, p278-282. 5p. - Publication Year :
- 2010
-
Abstract
- Abstract: Shell weights of Globigerinoides sacculifer and the elemental concentration of magnesium and calcium (Mg/Ca) from Globigerinoides ruber measured from an Arabian Sea sediment core, AAS9/21, exhibit an inverse relationship with each other, which reveals that shell weights are mainly controlled by surface water [CO3 =] rather than calcification temperature. Down core shell weight variations of Core AAS9/21 show an excellent correspondence with CO2 concentrations in an Antarctic Ice Core, which reveals that planktic forminifera shells can trace atmospheric CO2 due to the resultant change in surface water [CO3 =]. Hence, shell weights of G. sacculifer can be used as a proxy to reconstruct atmospheric CO2 concentrations in the past. Here, based on the shell weights, surface water [CO3 =] change in the Arabian Sea is quantified and found that a [CO3 =] variation of ∼8μmol/kg occurred during the Holocene and a ∼36μmol/kg variation occurred during the last glacial period. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00253227
- Volume :
- 275
- Issue :
- 1-4
- Database :
- Academic Search Index
- Journal :
- Marine Geology
- Publication Type :
- Academic Journal
- Accession number :
- 52823798
- Full Text :
- https://doi.org/10.1016/j.margeo.2010.05.004