(Table 1) Planktonic foraminifera counts and stable oxygen isotope ratios of Pacific Ocean surface sediments

• Main Authors: Rincón-Martínez, Daniel, Steph, Silke, Lamy, Frank, Mix, Alan C, Tiedemann, Ralf
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: 202-1239A; BC; Box corer; Calculated; Counting 355-400 µm fraction; DEPTH; sediment/rock; DRILL; Drilling/drill rig; Elevation of event; Event label; Foraminifera; planktic; GC; Genesis III; RR9702A; Globigerinoides ruber; δ18O; Globigerinoides ruber white; Globigerinoides sacculifer; Globigerinoides trilobus; Globorotalia menardii; Globorotalia menardii cultrata; Globorotalia tumida; Gravity corer; Joides Resolution; Latitude of event; Leg202; Longitude of event; M1; M2; Mass spectrometer Finnigan MAT 251; ME0005A; ME0005A-14MC2; ME0005A-15MC6; ME0005A-20MC8; ME0005A-21MC3; ME0005A-25MC5; ME0005A-29MC2; ME0005A-35MC1; ME0005A-38MC2; ME0005A-41MC2; Melville; Pacific; Planktonic foraminifera
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.774728; https://doi.org/10.1594/PANGAEA.774728

Core-top samples from the eastern tropical Pacific (10°N to 20°S) were used to test whether the ratio between Globorotalia menardii cultrata and Neogloboquadrina dutertrei abundance (Rc/d) and the oxygen isotope composition (?18O) of planktonic foraminifera can be used as proxies for the latitudinal position of the Equatorial Front. Specifically, this study compares the ?18O values of eight species of planktonic foraminifera (Globigerinoides ruber sensu stricto (ss) and sensu lato (sl), Globigerinoides sacculifer, Globigerinoides triloba, Pulleniatina obliquiloculata, Neogloboquadrina dutertrei, Globorotalia menardii menardii, Globorotalia menardii cultrata and Globorotalia tumida) with the seasonal hydrography of the region, and evaluates the application of each species or combination of species for paleoceanographic reconstructions. The results are consistent with sea surface temperature and water column stratification patterns. We found that in samples north of 1°N, the Rc/d values tend to be higher and d18O values of G. ruber, G. sacculifer, G. triloba, P. obliquiloculata, N. dutertrei, and G. menardii cultrata tend to be lower than those from samples located south of 1°N. We suggest that the combined use of Rc/d and the d18O difference between G. ruber and G. tumida or between P. obliquiloculata and G. tumida are the most suitable tools for reconstructing changes in the latitudinal position of the Equatorial Front and changes in the thermal stratification of the upper water column in the eastern tropical Pacific.