Mekik, Figen; Raterink, Lisa (2008): Dissolution index and shell weights of planktonic foraminifera [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.832534, Supplement to: Mekik, F; Raterink, L (2008): Effects of surface ocean conditions on deep-sea calcite dissolution proxies in the tropical Pacific. Paleoceanography, 23(1), PA1216, https://doi.org/10.1029/2007PA001433
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Abstract:
Finding the ideal deep-sea CaCO3 dissolution proxy is essential for quantifying the role of the marine carbonate system in regulating atmospheric pCO2 over millennia. We explore the potential of using the Globorotalia menardii fragmentation index (MFI) and size-normalized foraminifer shell weight (SNSW) as complementary indicators of deep-sea CaCO3 dissolution. MFI has strong correlations with bottom water [CO3]2-, modeled estimates of percent CaCO3 dissolved, and Mg/Ca in Pulleniatina obliquiloculata in core top samples along a depth transect on the Ontong Java Plateau (OJP) where surface ocean temperature variation is minimal. SNSW of P. obliquiloculata and Neogloboquadrina dutertrei have weak correlations with MFI-based percent dissolved, Mg/Ca in P. obliquiloculata shells and bottom water [CO3]2- on the OJP. In core top samples from the eastern equatorial Pacific (EEP), SNSW of P. obliquiloculata has moderate to strong correlations with both MFI-based percent CaCO3 dissolved estimates and surface ocean environmental parameters. SNSW of N. dutertrei shells shows a latitudinal distribution in the EEP and a moderately strong correlation with MFI-based percent dissolved estimates when samples from the equatorial part of the region are excluded. Our results suggest that there may potentially be multiple genotypes of N. dutertrei in the EEP which may be reflected in their shell weight. MFI-based percent CaCO3 dissolved estimates have no quantifiable relationship with any surface ocean environmental parameter in the EEP. Thus MFI acts as a reliable quantitative CaCO3 dissolution proxy insensitive to environmental biases within calcification waters of foraminifers.
Coverage:
Median Latitude: -3.246032 * Median Longitude: -149.244196 * South-bound Latitude: -27.085000 * West-bound Longitude: 155.865000 * North-bound Latitude: 10.490000 * East-bound Longitude: -77.563000
Date/Time Start: 1963-12-20T00:00:00 * Date/Time End: 1989-09-20T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Mekik, F; Raterink, L (2008): (Table S2) Shell weight variation within specific size ranges for P. obliquiloculata in sediemnt samples of ERDC-089PG. https://doi.org/10.1594/PANGAEA.832533
- Mekik, F; Raterink, L (2008): (Table S2) Foraminifer weight measurements from core-top sediment samples. https://doi.org/10.1594/PANGAEA.832532
- Mekik, F; Raterink, L (2008): (Table S1) Globorotalia menardii fragmentation index of core-top sediment samples. https://doi.org/10.1594/PANGAEA.832531