Relationship between Weights of Planktonic Foraminifer Shell and Surface Water CO3 = Concentration during the Holocene and Last Glacial Period

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 surf...

Full description

Bibliographic Details
Main Authors: Sushant S. Naika, P. Divakar Naidua, Pawan Govilb, Shital Godada
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Atmospheric CO2 proxy
carbonate ion concentration
Indian Ocean
Globigerinoides sacculifer
Antarctic
Indian
Antarc*
ice core
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.603.8876
http://drs.nio.org/drs/bitstream/2264/3692/1/Mar_Geol_275_278a.pdf
Description
Summary: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 shows 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 ~8 µmol/kg occurred during the Holocene and a ~36µmol/kg variation occurred during the last glacial period.

Similar Items