Progress toward a multi-basin calibration for quantifying deep sea calcite preservation in the tropical/subtropical world ocean

Glacial deep ocean sequestration of CO2 driven by the eastern equatorial Pacific biologic pump

“…Calcite dissolution was estimated in all three cores using the planktonic foraminifer Globorotalia menardii Fragmentation Index (MFI) converted to percent calcite dissolved following the methods of Mekik et al (2002Mekik et al ( , 2010.…”

“…MFI is defined as the ratio of whole to damaged G. menardii in the >150 μm size fraction of a core sample. Error bars represent the MFI transfer function predictive error of 10%(Mekik et al, 2010).…”

“…Downcore percent calcite dissolved, obtained using the G. menardii fragmentation index (MFI) dissolution proxy developed byMekik et al (2010Mekik et al ( , 2012. MFI is defined as the ratio of whole to damaged G. menardii in the >150 μm size fraction of a core sample.…”

Field Testing the Fidelity of δ18O and δ13C in Reconstructing Upper Ocean Hydrography

“…The CO 3 2− undersaturation of waters is expressed as ΔCO 3 2− , which is the difference between the [CO 3 2− ] of in situ waters and the saturation concentration of CO 3 2− . Bottom water ΔCO 3 2− data for all core top samples have been previously published (Mekik et al, ). For our sample locations on RIO, the data incorporated in the GLODAP v.2 bottle data are transects 49NZ20031106, 33RO20110926, 29HE20010305, and 74JC19950320.…”

Calcareous plankton and geochemistry from the ODP site 1209B in the NW Pacific Ocean (Shatsky Rise): New data to interpret calcite dissolution and paleoproductivity changes of the last 450 ka

“…Some of these indices are based on calcareous micro-organisms, particularly the planktonic foraminifera (e.g., Dittert and Henrich, 2000;Conan et al, 2002;Mekik et al, 2002Mekik et al, , 2010Loubere and Chellappa, 2008). The ratio of dissolution prone to dissolution resistant planktonic foraminiferal shells (Berger, 1970) or the ratio of the foraminiferal fragments to whole shells (Peterson and Prell, 1985;Wu and Berger, 1989) is extensively used for dissolution evaluation.…”