Palmer, Martin R; Pearson, Paul N; Cobb, S J (1998): (Table 1) Boron-isotope measurements of planktonic and benthic foraminifera of ODP Hole 144-871A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.769846, Supplement to: Palmer, MR et al. (1998): Reconstructing Past Ocean pH-Depth Profiles. Science, 282(5393), 1468-1471, https://doi.org/10.1126/science.282.5393.1468
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Abstract:
Measurement of boron isotope compositions in species of planktonic foraminifera that calcified their tests at different depths in the water column are used to reconstruct the pH profile of the upper water column of the tropical ocean. Results for five time windows from the middle Miocene to the late Pleistocene indicate pH-depth profiles similar to that of the modern ocean in this area, which suggests that this method may greatly aid in our understanding of the global carbon cycle.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 5.557200 * Longitude: 172.344300
Date/Time Start: 1992-05-24T09:00:00 * Date/Time End: 1992-05-25T03:45:00
Minimum Elevation: -1266.0 m * Maximum Elevation: -1266.0 m
Event(s):
144-871A * Latitude: 5.557200 * Longitude: 172.344300 * Date/Time Start: 1992-05-24T09:00:00 * Date/Time End: 1992-05-25T03:45:00 * Elevation: -1266.0 m * Penetration: 151.9 m * Recovery: 126.05 m * Location: North Pacific Ocean * Campaign: Leg144 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 151.9 m cored; 0 m drilled; 83 % recovery
Comment:
Depth assignments: Planktonic foraminifera have complex life cycles and different species calcify at different depths in the water column [C. Hemleben, M. Spindler, O. R. Anderson, Modern Planktonic Foraminifera (Springer-Verlag, Berlin, 1989). Tropical areas, like site 871, with a strong thermocline and thick mixed layer tend to have the most diverse and well-stratified assemblages. Many species (such as in the genus Globigerinoides) that spend their entire life cycle in the mixed layer (upper 100 m) possess obligate photosymbionts and are omnivorous. Other species stratify through intermediate, thermocline, and deep planktonic habitats (such as Globorotalia species) and feed on algae and sinking phytodetritus. Calcification depths for modern and extinct plankton species were estimated based on previous plankton tow and oxygen isotope studies [Shackleton and Vincent, 1978, doi:10.1016/0377-8398(78)90008-7; Erez and Honjo 1981, doi:10.1016/0031-0182(81)90035-3; Fairbanks et al., 1982, doi:10.1038/298841a0; Keller, Geol. Soc. Am. Mem. 163, 177 (1985); Deuser, 1987, doi:10.2113/gsjfr.17.1.14; Gasperi and Kennett, 1993, doi:10.1016/0377-8398(93)90046-Z; Pearson and Shackleton, 1995, doi:10.2973/odp.proc.sr.144.054.1995; Watkins et al., 1998, doi:10.1016/S0377-8398(97)00036-4]. Specimens of G. tumida with and without a thick gametogenic crust were picked separately and are interpreted as representing thermocline and deep planktonic habitats, respectively. Designation of Dentoglobigerina altispira as a thermocline calcifier differs from some earlier suggestions but follows Pearson and Shackleton, as well as Opdyke and Pearson (1995, doi:10.2973/odp.proc.sr.144.052.1995).
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
225 data points
Data
| 1 Sample label | 2 Species | 3 Size | 4 δ11B [‰ SRM] | 5 Comment |
|---|---|---|---|---|
| 144-871A-1H-1,124-126 | Globigerinoides ruber | 500-600 | 23.2 | mixed layer, 0-100 m |
| 144-871A-1H-1,124-126 | Globigerinoides sacculifer | 500-600 | 23.2 | mixed layer, 0-100 m |
| 144-871A-1H-1,124-126 | Globigerinoides sacculifer | 425-500 | 27.7 | mixed layer, 0-100 m |
| 144-871A-1H-1,124-126 | Globigerinoides sacculifer | 355-425 | 24.0 | mixed layer, 0-100 m |
| 144-871A-1H-1,124-126 | Globigerinoides conglobatus | 500-600 | 26.5 | mixed layer, 0-100 m |
| 144-871A-1H-1,124-126 | Globigerinoides conglobatus | 425-500 | 27.3 | mixed layer, 0-100 m |
| 144-871A-1H-1,124-126 | Globigerinella siphonifera | 500-600 | 23.3 | mixed layer, 0-100 m |
| 144-871A-1H-1,124-126 | Globigerinella siphonifera | 425-500 | 24.6 | mixed layer, 0-100 m |
| 144-871A-1H-1,124-126 | Globigerinella siphonifera | 355-425 | 24.6 | mixed layer, 0-100 m |
| 144-871A-1H-1,124-126 | Sphaeroidenella dehsicens | 500-600 | 25.4 | intermediate, 50-150 m |
| 144-871A-1H-1,124-126 | Pulleniatina obliquiloculata | 500-600 | 22.3 | intermediate, 50-150 m |
| 144-871A-1H-1,124-126 | Pulleniatina obliquiloculata | 425-500 | 23.4 | intermediate, 50-150 m |
| 144-871A-1H-1,124-126 | Pulleniatina obliquiloculata | 355-425 | 24.3 | intermediate, 50-150 m |
| 144-871A-1H-1,124-126 | Globorotalia menardii | 500-600 | 21.1 | thermocline, 100-250 m |
| 144-871A-1H-1,124-126 | Globorotalia tumida (no gametogenic crust) | 500-600 | 23.2 | thermocline, 100-250 m |
| 144-871A-1H-1,124-126 | Globoquadrina conglomerata | 500-600 | 23.4 | thermocline, 100-250 m |
| 144-871A-1H-1,124-126 | Globorotalia tumida (gametic crust) | 500-600 | 19.7 | deep, >200 m |
| 144-871A-1H-1,124-126 | Globorotalia crassaformis | 250-355 | 21.3 | deep, >200 m |
| 144-871A-1H-1,124-126 | Mixed benthics | 250-600 | 24.4 | sea floor, 1250 m |
| 144-871A-3H-2,123-125 | Globigerinoides sacculifer | 425-500 | 27.1 | mixed layer, 0-100 m |
| 144-871A-3H-2,123-125 | Globigerinella siphonifera | 425-600 | 25.2 | mixed layer, 0-100 m |
| 144-871A-3H-2,123-125 | Globigerinoides ?stulosis | 500-600 | 25.3 | mixed layer, 0-100 m |
| 144-871A-3H-2,123-125 | Pulleniatina praecursor | 500-600 | 22.9 | intermediate, 50-150 m |
| 144-871A-3H-2,123-125 | Globorotalia menardii | 500-710 | 20.3 | thermocline, 100-250 m |
| 144-871A-3H-2,123-125 | Globorotalia tumida (gametic crust) | 500-600 | 20.6 | deep, >200 m |
| 144-871A-3H-2,123-125 | Mixed benthics | 355-850 | 21.6 | sea floor, 1250 m |
| 144-871A-3H-5,123-125 | Globigerinoides sacculifer | 425-600 | 25.0 | mixed layer, 0-100 m |
| 144-871A-3H-5,123-125 | Globigerinoides trilobus | 355-500 | 23.9 | mixed layer, 0-100 m |
| 144-871A-3H-5,123-125 | Dentoglobigerina altispira | 425-600 | 21.1 | thermocline, 100-250 m |
| 144-871A-3H-5,123-125 | Globorotalia menardii | 425-600 | 20.1 | thermocline, 100-250 m |
| 144-871A-3H-5,123-125 | Globorotalia pleisotumida | 250-300 | 20.3 | thermocline, 100-250 m |
| 144-871A-3H-5,123-125 | Mixed benthics | 355-850 | 20.9 | sea floor, 1250 m |
| 144-871A-4H-5,59-61 | Globigerinoides ruber | 250-300 | 23.1 | mixed layer, 0-100 m |
| 144-871A-4H-5,59-61 | Globigerinoides obliquus | 250-300 | 24.5 | mixed layer, 0-100 m |
| 144-871A-4H-5,59-61 | Globigerinoides trilobus | 300-425 | 24.6 | mixed layer, 0-100 m |
| 144-871A-4H-5,59-61 | Paragloborotalia mayeri | 300-425 | 21.3 | intermediate, 50-150 m |
| 144-871A-4H-5,59-61 | Fohsella fohsi | 355-425 | 20.0 | intermediate, 50-150 m |
| 144-871A-4H-5,59-61 | Dentoglobigerina altispira | 500-600 | 22.6 | thermocline, 100-250 m |
| 144-871A-4H-5,59-61 | Globoquadrina venezuelana | 425-600 | 19.4 | deep, >200 m |
| 144-871A-8H-2,59-63 | Globigerinoides obliquus | 250-300 | 23.1 | mixed layer, 0-100 m |
| 144-871A-8H-2,59-63 | Globigerinoides trilobus | 300-425 | 24.3 | mixed layer, 0-100 m |
| 144-871A-8H-2,59-63 | Fohsella peripheroronda | 250-355 | 23.6 | intermediate, 50-150 m |
| 144-871A-8H-2,59-63 | Paragloborotalia mayeri | 250-300 | 22.3 | intermediate, 50-150 m |
| 144-871A-8H-2,59-63 | Dentoglobigerina altispira | 500-600 | 22.0 | thermocline, 100-250 m |
| 144-871A-8H-2,59-63 | Globoquadrina venezuelana | 425-500 | 19.4 | deep, >200 m |