McKenna, V S; Farrell, John W; Murray, David W; Clemens, Steven C (1995): (Appendix) Planktonic foraminifera abundances in ODP Site 138-847B [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.807318, Supplement to: McKenna, VS et al. (1995): The foraminifer record at Site 847: Paleoceanographic response to late Pleistocene climate variability. In: Pisias, NG; Mayer, LA; Janecek, TR; Palmer-Julson, A; van Andel, TH (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 138, 695-714, https://doi.org/10.2973/odp.proc.sr.138.141.1995
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Abstract:
Sediments from Site 847 in the eastern equatorial Pacific Ocean provide a record of the variability of the equatorial divergence and associated upwelling. We interpret the variation in foraminifer assemblages in the context of regional Oceanographic change. Our record is composed of three time slices selected from the last 0.9 Ma. A Q-mode analysis of foraminifer abundance data results in a four-factor model that was used to quantify the faunal changes and to characterize paleoceanographic variability. The species of foraminifers with high factor scores for each factor suggested a specific set of Oceanographic conditions. The timing of the high loadings for each factor appears to be associated with a particular part of a glacial cycle. Thus, we interpreted our findings in the context of the glacial/interglacial cycle proposed by Imbrie et. al. (1992). This idealized cycle consists of four stages that are defined by characteristic changes in specific elements of the climate system. We evaluated how such changes in the climate system might affect the Oceanographic conditions at Site 847.
Our results suggest that upwelling remains a dominant process in both glacial and interglacial stages, but decreases significantly on most deglacials. Subantarctic mode water formation and equatorial upwelling appear to form a linked system that determines the specific characteristics of the water forming a major part of the Equatorial Undercurrent as well as the transport volume of the undercurrent. In conjunction with changes in upwelling at Site 847, this variation in the undercurrent results in changes in mixed layer depth, sea-surface temperature, and oxygen and nutrient levels at the site.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 0.193080 * Median Longitude: -95.320057 * South-bound Latitude: 0.192950 * West-bound Longitude: -95.320450 * North-bound Latitude: 0.193210 * East-bound Longitude: -95.319810
Date/Time Start: 1991-05-28T06:50:00 * Date/Time End: 1991-05-31T05:25:00
Minimum DEPTH, sediment/rock: 0.02 m * Maximum DEPTH, sediment/rock: 23.57 m
Event(s):
138-847B * Latitude: 0.193210 * Longitude: -95.320450 * Date/Time Start: 1991-05-28T06:50:00 * Date/Time End: 1991-05-29T18:40:00 * Elevation: -3334.3 m * Penetration: 247 m * Recovery: 242.19 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 247 m cored; 0 m drilled; 98.1 % recovery
138-847C * Latitude: 0.193080 * Longitude: -95.319810 * Date/Time Start: 1991-05-29T18:40:00 * Date/Time End: 1991-05-30T15:50:00 * Elevation: -3334.3 m * Penetration: 232.3 m * Recovery: 225.71 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 25 cores; 230.3 m cored; 0 m drilled; 98 % recovery
138-847D * Latitude: 0.192950 * Longitude: -95.319910 * Date/Time Start: 1991-05-30T13:50:00 * Date/Time End: 1991-05-31T05:25:00 * Elevation: -3335.2 m * Penetration: 130.1 m * Recovery: 133.57 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 130.1 m cored; 0 m drilled; 102.7 % recovery
Comment:
DEPTH, sediment is given in mbsf. Time Slice 1 (TSI) covers oxygen isotope stages 1 to 6 (0-0.135 Ma), Time Slice 2 (TS2) covers stages 11 to 14 (0.395-0.572 Ma), and Time Slice 3 (TS3) covers stages 18 to 21 (0.704-0.852 Ma).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | McKenna, V S | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Depth, composite | Depth comp | mcd | McKenna, V S | Intercore correlation | this study ]Bmcd] |
| 5 | AGE | Age | ka BP | Geocode | ||
| 6 | Orbulina universa | O. universa | % | McKenna, V S | Counting >150 µm fraction | |
| 7 | Globigerinoides conglobatus | G. conglobatus | % | McKenna, V S | Counting >150 µm fraction | |
| 8 | Globigerinoides ruber pink | G. ruber p | % | McKenna, V S | Counting >150 µm fraction | |
| 9 | Globigerinoides ruber white | G. ruber w | % | McKenna, V S | Counting >150 µm fraction | |
| 10 | Globigerinoides tenellus | G. tenellus | % | McKenna, V S | Counting >150 µm fraction | |
| 11 | Globigerinoides sacculifer wo sac | G. sacculifer wo sac | % | McKenna, V S | Counting >150 µm fraction | |
| 12 | Globigerinoides sacculifer sac | G. sacculifer sac | % | McKenna, V S | Counting >150 µm fraction | |
| 13 | Sphaeroidinella dehiscens | S. dehiscens | % | McKenna, V S | Counting >150 µm fraction | |
| 14 | Globigerinella aequilateralis | G. aequilateralis | % | McKenna, V S | Counting >150 µm fraction | |
| 15 | Globigerina calida | G. calida | % | McKenna, V S | Counting >150 µm fraction | |
| 16 | Globigerina bulloides | G. bulloides | % | McKenna, V S | Counting >150 µm fraction | |
| 17 | Globigerina falconensis | G. falconensis | % | McKenna, V S | Counting >150 µm fraction | |
| 18 | Globigerina digitata | G. digitata | % | McKenna, V S | Counting >150 µm fraction | |
| 19 | Globigerina rubescens | G. rubescens | % | McKenna, V S | Counting >150 µm fraction | |
| 20 | Turborotalita quinqueloba | T. quinqueloba | % | McKenna, V S | Counting >150 µm fraction | |
| 21 | Neogloboquadrina pachyderma sinistral | N. pachyderma s | % | McKenna, V S | Counting >150 µm fraction | |
| 22 | Neogloboquadrina pachyderma dextral | N. pachyderma d | % | McKenna, V S | Counting >150 µm fraction | |
| 23 | Neogloboquadrina dutertrei | N. dutertrei | % | McKenna, V S | Counting >150 µm fraction | |
| 24 | Globoquadrina conglomerata | G. conglomerata | % | McKenna, V S | Counting >150 µm fraction | |
| 25 | Globoquadrina hexagona | G. hexagona | % | McKenna, V S | Counting >150 µm fraction | |
| 26 | Pulleniatina obliquiloculata | P. obliquiloculata | % | McKenna, V S | Counting >150 µm fraction | |
| 27 | Globorotalia inflata | G. inflata | % | McKenna, V S | Counting >150 µm fraction | |
| 28 | Globorotalia truncatulinoides sinistral | G. truncatulinoides s | % | McKenna, V S | Counting >150 µm fraction | |
| 29 | Globorotalia truncatulinoides dextral | G. truncatulinoides d | % | McKenna, V S | Counting >150 µm fraction | |
| 30 | Globorotalia crassaformis | G. crassaformis | % | McKenna, V S | Counting >150 µm fraction | |
| 31 | Neogloboquadrina pachyderma dextral and dutertrei intergrade | P/D int | % | McKenna, V S | Counting >150 µm fraction | |
| 32 | Globorotalia hirsuta | G. hirsuta | % | McKenna, V S | Counting >150 µm fraction | |
| 33 | Globorotalia scitula | G. scitula | % | McKenna, V S | Counting >150 µm fraction | |
| 34 | Globorotalia anfracta | G. anfracta | % | McKenna, V S | Counting >150 µm fraction | |
| 35 | Globorotalia menardii | G. menardii | % | McKenna, V S | Counting >150 µm fraction | |
| 36 | Globorotalia tumida | G. tumida | % | McKenna, V S | Counting >150 µm fraction | |
| 37 | Globorotalia flexuosa | G. flexuosa | % | McKenna, V S | Counting >150 µm fraction | |
| 38 | Globigerinita glutinata | G. glutinata | % | McKenna, V S | Counting >150 µm fraction | |
| 39 | Globorotalia theyeri | G. theyeri | % | McKenna, V S | Counting >150 µm fraction | |
| 40 | Foraminifera, planktic, other | Foram plankt oth | % | McKenna, V S | Counting >150 µm fraction | |
| 41 | Foraminifera, planktic | Foram plankt | # | McKenna, V S | Counting >150 µm fraction | |
| 42 | Foraminifera, planktic, whole test | Foram plankt whole | % | McKenna, V S | Counting >150 µm fraction | |
| 43 | Sedimentation rate | SR | cm/ka | McKenna, V S | Calculated | |
| 44 | Density, dry bulk | DBD | g/cm3 | McKenna, V S | Calculated | |
| 45 | Split | Split | McKenna, V S | |||
| 46 | Sample mass | Samp m | g | McKenna, V S | ||
| 47 | Foraminifera, planktic | Foram plankt | #/g | McKenna, V S | Counting >150 µm fraction | |
| 48 | Accumulation rate, planktic foraminifera by number | Acc rate plankt for | #/cm2/ka | McKenna, V S | Counting >150 µm fraction | |
| 49 | Dissolution index | DX | McKenna, V S | Calculated |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4089 data points
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