NOAA/WDS Paleoclimatology - Prydz Bay, East Antarctica 36-33ma Biomarker Data and Climate Reconstructions
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Paleoceanography. The data include parameters of paleoceanography with a geographic location of Antarctica. The time period coverage is from 35765000 to 32926000 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
- Cite as: Tibbett, E.J.; Scher, H.D.; Warny, S.; Tierney, J.E.; Passchier, S.; Feakins, S.J. (2020-12-17): NOAA/WDS Paleoclimatology - Prydz Bay, East Antarctica 36-33ma Biomarker Data and Climate Reconstructions. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/vc7s-6549. Accessed [date].
- Please refer to Credit tab for full citation information.
- doi:10.25921/vc7s-6549
- noaa-ocean-32052
- NCEI DSI 1200_02
- NCEI DSI 1200_01
noaa-ocean-32052
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Distributor | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | Data Center Contact
NOAA World Data Service for Paleoclimatology 828-271-4800 paleo@noaa.gov |
Coverage Description | Date Range: 35765000 cal yr BP to 32926000 cal yr BP; |
Time Period | -35763050 to -32924050 |
Spatial Bounding Box Coordinates |
N: -67.276167
S: -67.696167
E: 75.4045
W: 74.787
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Spatial Coverage Map |
General Documentation |
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Data update frequency not available |
Supplemental Information |
STUDY NOTES: Biomarker and pollen data from 4 ODP cores collected in Prydz Bay, East Antarctica, for 36-33 million years BP, plus SST and air temperature reconstructions. Provided Keywords: Ocean Drilling Program; Expedition 119; Site 739; Site 742; Expedition 188; Site 1166; biomarkers Sample List for Pollen Samples (working half of core). Composite depth based on Passchier et al. 2017. site hole core type sect top bottom depth_m mcd_m age_ma IODP_ID 739 C 28 R 2 35 36 204.365 204.365 32.926 119-739C-28R-2-W 35/36-TIBBETT 739 C 29 R 3 63 64 215.835 215.835 33.004 119-739C-29R-3-W 63/64-TIBBETT 739 C 30 R 5 5 6 227.855 227.855 33.085 119-739C-30R-5-W 5/6-TIBBETT 739 C 31 R 3 73 74 235.135 235.135 33.135 119-739C-31R-3-W 73/74-TIBBETT 739 C 33 R 2 60 61 252.805 252.805 33.255 119-739C-33R-2-W 60/61-TIBBETT 739 C 33 R 6 73 74 258.935 258.935 33.297 119-739C-33R-6-W 73/74-TIBBETT 739 C 34 R 3 84 85 264.245 264.245 33.333 119-739C-34R-3-W 84/85-TIBBETT 739 C 35 R 3 4 5 273.045 273.045 33.393 119-739C-35R-3-W 4/5-TIBBETT 739 C 36 R 2 52 53 281.725 281.725 33.452 119-739C-36R-2-W 52/53-TIBBETT 739 C 36 R 5 62 63 286.325 286.325 33.483 119-739C-36R-5-W 62/63-TIBBETT 739 C 38 R 3 109 110 302.995 302.995 33.596 119-739C-38R-3-W 109/110-TIBBETT 739 C 39 R 1 117 118 309.775 309.775 33.642 119-739C-39R-1-W 117/118-TIBBETT 739 C 40 R 1 133 134 319.535 319.535 33.709 119-739C-40R-1-W 133/134-TIBBETT 739 C 41 R 3 18 19 330.985 330.985 33.787 119-739C-41R-3-W 18/19-TIBBETT 739 C 42 R 2 117 118 340.175 340.175 33.849 119-739C-42R-2-W 117/118-TIBBETT 739 C 46 R 2 4 5 377.745 377.745 34.105 119-739C-46R-2-W 4/5-TIBBETT 739 C 47 R 1 45 46 386.355 386.355 34.163 119-739C-47R-1-W 45/46-TIBBETT 739 C 48 R 1 125 126 396.855 396.855 34.235 119-739C-48R-1-W 125/126-TIBBETT 739 C 51 R 1 66 67 425.165 425.165 34.427 119-739C-51R-1-W 66/67-TIBBETT 739 C 56 R 1 25 26 453.755 453.755 34.622 119-739C-56R-1-W 25/26-TIBBETT 739 C 58 R 2 61 62 465.315 465.315 34.700 119-739C-58R-2-W 61/62-TIBBETT 739 C 60 R 1 32 33 473.225 473.225 34.754 119-739C-60R-1-W 32/33-TIBBETT 742 A 20 R 1 119 120 172.495 483.925 34.827 119-742A-20R-1-W 119/120-TIBBETT 742 A 20 R 2 68 69 173.485 484.915 34.833 119-742A-20R-2-W 68/69-TIBBETT 742 A 21 R 1 18 19 181.185 492.615 34.886 119-742A-21R-1-W 18/19-TIBBETT 742 A 21 R 3 45 46 184.455 495.885 34.908 119-742A-21R-3-W 45/46-TIBBETT 742 A 22 R 1 122 123 191.925 503.355 34.959 119-742A-22R-1-W 122/123-TIBBETT 742 A 26 R 1 37 38 229.575 541.005 35.215 119-742A-26R-1-W 37/38-TIBBETT 742 A 27 R 7 44 45 248.245 559.675 35.342 119-742A-27R-7-W 44/45-TIBBETT 742 A 29 R 6 78 79 266.385 577.815 35.465 119-742A-29R-6-W 78/79-TIBBETT 742 A 32 R 4 107 108 292.675 604.105 35.644 119-742A-32R-4-W 107/108-TIBBETT 742 A 33 R 6 48 49 304.685 616.115 35.726 119-742A-33R-6-W 48/49-TIBBETT 742 A 34 R 1 33 34 306.635 618.065 35.739 119-742A-34R-1-W 33/34-TIBBETT 1166 A 15 R 5 44 45 138.995 618.985 35.731 188-1166A-15R-5-W 44/45-TIBBETT 1166 A 16 R 2 86 87 144.565 624.555 35.740 188-1166A-16R-2-W 86/87-TIBBETT 1166 A 16 R 3 29 30 145.495 625.485 35.741 188-1166A-16R-3-W 29/30-TIBBETT 1166 A 17 R 1 13 14 151.535 631.525 35.750 188-1166A-17R-1-W 13/14-TIBBETT 1166 A 17 R 3 114 115 155.545 635.535 35.756 188-1166A-17R-3-W 114/115-TIBBETT 1166 A 18 R 1 11 12 161.115 641.105 35.765 188-1166A-18R-1-W 11/12-TIBBETT
ABSTRACT SUPPLIED BY ORIGINATOR: The Eocene-Oligocene Transition (EOT) marks the onset of Antarctic glaciation at 33.7 Ma. Although the benthic d18O record defines the major continental ice sheet expansion, recent sedimentary and geochemical evidence suggests the presence of earlier ephemeral ice sheets. Sediment cores from Ocean Drilling Program (ODP) Legs 119 and 188 in Prydz Bay provide an archive of conditions in a major drainage system of East Antarctica. We study biomarker and microfossil evidence to discern how the vegetation and climate shifted between 36-33 Ma. Pollen were dominated by reworked Permian Glossopterid gymnosperms; however, penecontemporaneous Eocene pollen assemblages indicate that vegetation such as moss, ferns, southern beech and podocarp trees grew in the region and survived the glacial advances suggesting some non-glaciated land. At the EOT, brGDGT soil biomarkers indicate abrupt cooling from 13-8C and soil pH increases from 6.0 to 6.7, suggesting drying. The biomarker proxies record cooling in under 50 ka, compared to the gradual trend detected by weathering proxies. Plant wax dD and d13C show further evidence for drying with shifts of 20 per mil and 1.1 per mil respectively across the EOT. Although the terrestrial soil biomarker influx mostly precludes use of TEX86, a few determinations find sea surface temperatures of 12C in the late Eocene cooling to 8C at the EOT. Marine productivity undergoes a sustained increase after the glacial advance, whether promoted by glacial nutrient flux and/or enhanced overturning circulation. Between the two glacial surge events of the Priabonian Oxygen Maximum (PrOM) at 37.3 Ma and the EOT at 33.7 Ma, we observe three warm events at 35.8, 34.9 and 34.7 Ma with a rise in temperature of 2-5C and increases in penecontemporaneous pollen and enhanced marine productivity, capturing the last flickers of Antarctic warmth before almost complete glaciation at the EOT. |
Purpose | Records of past climate and ocean circulation derived from marine sediments. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. |
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Theme keywords | Global Change Master Directory (GCMD) Science Keywords
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Last Modified: 2023-09-01
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