Dowsett, Harry J; Poore, Richard Z (1990): Occurrence of planktic foraminifera in Pliocene to Holocene sediments of DSDP Hole 81-552A in the North Atlantic (Appendix 2) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.690450, Supplement to: Dowsett, HJ; Poore, RZ (1990): A new planktic foraminifer transfer function for estimating Pliocene - Holocene Sea Surface temperatures. Marine Micropaleontology, 16(1-2), 1-23, https://doi.org/10.1016/0377-8398(90)90026-I
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Abstract:
A new planktic foraminifer transfer function (GSF18) related 5 North Atlantic assemblages to winter and summer sea surface temperature. GSF18, based on recombined and simplified core top census data, preserves most environmental information and reproduces modern North Atlantic conditions with approximately the same accuracy as previous transfer functions, but can be more readily applied to faunal samples ranging in age from Pliocene to Holocene. Transfer function GSF18 has been applied to faunal data from Deep Sea Drilling Project Hole 552A to produce a 2.5 m.y. sea-surface temperature (SST) time series. Estimates show several periods between 2.3 and 4.6 Ma during which mean SST's were both several degrees warmer and several degrees cooler than modern conditions. Between 2.9 and 4.0 Ma SST was generally warmer than modern except for a 250 k.y. interval centered at 3.3 Ma. Maximum SST, with respect to modern conditions, occurred after the cool interval near 3.1 Ma when SST was approximately 3.6° C warmer than present conditions. Comparison of SST estimates with stable isotope data suggest that after peak warming at 3.1 Ma, there was an overall surface water cooling with concomitant build up of global ice volume, culminating in Northern Hemisphere glaciation. This event is also indicated by the presence of ice rafted detritus in 552A sediments at about 2.45 Ma.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 56.042700 * Longitude: -23.231300
Date/Time Start: 1981-07-31T00:00:00 * Date/Time End: 1981-07-31T00:00:00
Minimum DEPTH, sediment/rock: 40.61 m * Maximum DEPTH, sediment/rock: 95.10 m
Event(s):
81-552A * Latitude: 56.042700 * Longitude: -23.231300 * Date/Time: 1981-07-31T00:00:00 * Elevation: -2301.0 m * Penetration: 183.5 m * Recovery: 182.3 m * Location: North Atlantic/PLATEAU * Campaign: Leg81 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 38 cores; 183.5 m cored; 0 m drilled; 99.4 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Dowsett, Harry J | DSDP/ODP/IODP sample designation | ||
| 3 | Globigerina bulloides | G. bulloides | # | Dowsett, Harry J | Counting >149 µm fraction | including G. praebulloides |
| 4 | Globigerina falconensis | G. falconensis | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 5 | Globigerina pseudobesa | G. pseudobesa | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 6 | Globigerina incisa | G. incisa | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 7 | Globigerina digitata | G. digitata | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 8 | Globigerina praedigitata | G. praedigitata | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 9 | Globigerina eamesi | G. eamesi | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 10 | Globigerina woodi | G. woodi | # | Dowsett, Harry J | Counting >149 µm fraction | including G. apertura |
| 11 | Globigerina sp. | Globigerina sp. | # | Dowsett, Harry J | Counting >149 µm fraction | var. 1, taxon resembles G. falconensis but has reticulate surface texture similar to G. woodi group |
| 12 | Globigerinella aequilateralis | G. aequilateralis | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 13 | Globigerinita glutinata | G. glutinata | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 14 | Globigerinoides obliquus | G. obliquus | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 15 | Globigerinoides ruber | G. ruber | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 16 | Globigerinoides spp. | Globigerinoides spp. | # | Dowsett, Harry J | Counting >149 µm fraction | representatives of Globigerinoides (usually small) that could not be confidently assigned to G. ruber, G. obliquus (s.l.) or G. conglobatus |
| 17 | Globorotalia conomiozea | G. conomiozea | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 18 | Globorotalia crassaformis | G. crassaformis | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 19 | Globorotalia crassaformis | G. crassaformis | # | Dowsett, Harry J | Counting >149 µm fraction | with full keeled ultimate whorl |
| 20 | Globorotalia hirsuta | G. hirsuta | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 21 | Globorotalia inflata | G. inflata | # | Dowsett, Harry J | Counting >149 µm fraction | including G. puncticulata |
| 22 | Globorotalia margaritae | G. margaritae | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 23 | Globorotalia menardii | G. menardii | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 24 | Globorotalia scitula | G. scitula | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 25 | Neogloboquadrina acostaensis | N. acostaensis | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 26 | Neogloboquadrina atlantica sinistral | N. atlantica s | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 27 | Neogloboquadrina atlantica dextral | N. atlantica d | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 28 | Neogloboquadrina pachyderma sinistral | N. pachyderma s | # | Dowsett, Harry J | Counting >149 µm fraction | relative small, compact with 4-5 chambers in the ultimate whorl, kummerform ultimate chamber, and a slightly to distinct oval equatorial outline are included here |
| 29 | Neogloboquadrina pachyderma dextral | N. pachyderma d | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 30 | Neogloboquadrina pachyderma dextral | N. pachyderma d | # | Dowsett, Harry J | Counting >149 µm fraction | this category is used for specimens of right-coiling Neogloboquadrina with more than four chambers in the ultimate whorl that are transitional between N. pachyderma and N. acostaensis or N. atlantica |
| 31 | Orbulina universa | O. universa | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 32 | Turborotalia quinqueloba | T. quinqueloba | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 33 | Foraminifera, planktic, other | Foram plankt oth | # | Dowsett, Harry J | Counting >149 µm fraction | this category includes rare unidentified specimens and taxa |
| 34 | Foraminifera, planktic reworked | Foram plankt rew | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 35 | Foraminifera, planktic | Foram plankt | # | Dowsett, Harry J | Counting >149 µm fraction | total |
| 36 | Foraminifera, planktic, fragments | Foram plankt fragm | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 37 | Ice rafted debris | IRD | # | Dowsett, Harry J | Counting >149 µm fraction | |
| 38 | Foraminifera, benthic | Foram benth | # | Dowsett, Harry J | Counting >149 µm fraction |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4587 data points
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