Thirumalai, Kaustubh; Cohen, Andrew N; Taylor, Dustin (2023): Individual ostracode valve analyses of Sclerocypris clavularis from modern Lake Turkana sediments - Inter-site means [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.958977, In: Thirumalai, K et al. (2023): Individual ostracode valve analyses of Sclerocypris clavularis from modern Lake Turkana sediments [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.958974
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Published: 2023-09-12 • DOI registered: 2023-10-11
Abstract:
This dataset contains pooled statistics of stable isotope and shell measurements of individual ostracode valve analyses (IOVA) alongside available in-situ measurements of pH, surface and bottom water temperature (BWT), total number of valves analyzed per site, IOVA-δ¹⁸O, IOVA-δ¹³C, shell mass, shell length/width, along with their average and standard deviations at 17 sites across Lake Turkana, eastern Africa. These modern sediments were collected using a modified Ekman dredge during May to November 1979. The stable isotopic measurements were conducted at the [Paleo² Laboratory at the University of Arizona|https://thirumalai.geo.arizona.edu/] on a Thermo Kiel IV Carbonate Device coupled to a 253 Plus IRMS; the length/width measurements were performed on a MeijiTechno HDZ7000TS Digital Zoom Microscope System, and mass of each valve was measured using a Sartorius Cubis II Ultra-Micro Balance. Details about the materials can be found in https://doi.org/10.1029/2022GC010790
Further details:
Thirumalai, Kaustubh (2023): Correlation Matrix for individual ostracode valve analyses of Sclerocypris clavularis from modern Lake Turkana sediments [dataset]. Correlation_Matrix-Thirumalai-2023-OsTurkana_Dataset.txt
Coverage:
Median Latitude: 3.592176 * Median Longitude: 36.136800 * South-bound Latitude: 2.738000 * West-bound Longitude: 35.853200 * North-bound Latitude: 4.361300 * East-bound Longitude: 36.627400
Date/Time Start: 1979-05-01T00:00:00 * Date/Time End: 1979-11-30T00:00:00
Minimum Elevation: -62.0 m * Maximum Elevation: -0.2 m
Event(s):
79-77F * Latitude: 3.541700 * Longitude: 35.958900 * Date/Time Start: 1979-05-01T00:00:00 * Date/Time End: 1979-11-30T00:00:00 * Elevation: -29.0 m * Location: Lake Turkana, Africa * Method/Device: Ekman grab (EG)
79-130F * Latitude: 3.565900 * Longitude: 35.908700 * Date/Time Start: 1979-05-01T00:00:00 * Date/Time End: 1979-11-30T00:00:00 * Elevation: -22.0 m * Location: Lake Turkana, Africa * Method/Device: Ekman grab (EG)
79-147F * Latitude: 3.772300 * Longitude: 36.221400 * Date/Time Start: 1979-05-01T00:00:00 * Date/Time End: 1979-11-30T00:00:00 * Elevation: -9.5 m * Location: Lake Turkana, Africa * Method/Device: Ekman grab (EG)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Thirumalai, Kaustubh | |||
| 2 | Latitude of event | Latitude | Thirumalai, Kaustubh | |||
| 3 | Longitude of event | Longitude | Thirumalai, Kaustubh | |||
| 4 | Elevation of event | Elevation | m | Thirumalai, Kaustubh | ||
| 5 | Site | Site | Thirumalai, Kaustubh | |||
| 6 | Distance | Distance | km | Thirumalai, Kaustubh | Distance from Omo inflow | |
| 7 | pH | pH | Thirumalai, Kaustubh | |||
| 8 | Sea surface temperature | SST | °C | Thirumalai, Kaustubh | ||
| 9 | Bottom water temperature | BWT | °C | Thirumalai, Kaustubh | ||
| 10 | Number of measurements | n | # | Thirumalai, Kaustubh | Individual ostracode valve analyses (IOVA) | |
| 11 | Ostracoda, mass | Ostrac m | mg | Thirumalai, Kaustubh | Ultra-micro lab balance, Sartorius Cubis II | Average shell mass |
| 12 | Ostracoda, mass, standard deviation | Ostrac m std dev | ± | Thirumalai, Kaustubh | Ultra-micro lab balance, Sartorius Cubis II | Average shell mass |
| 13 | Ostracoda, length | Ostrac l | mm | Thirumalai, Kaustubh | Digital Zoom Microscope System, MeijiTechno, HDZ7000TS | Average |
| 14 | Ostracoda, length, standard deviation | Ostrac l std dev | ± | Thirumalai, Kaustubh | Digital Zoom Microscope System, MeijiTechno, HDZ7000TS | Average |
| 15 | Ostracoda, length | Ostrac l | mm | Thirumalai, Kaustubh | Digital Zoom Microscope System, MeijiTechno, HDZ7000TS | Average width |
| 16 | Ostracoda, length, standard deviation | Ostrac l std dev | ± | Thirumalai, Kaustubh | Digital Zoom Microscope System, MeijiTechno, HDZ7000TS | Average width |
| 17 | Ostracoda, δ13C | Ostrac δ13C | ‰ PDB | Thirumalai, Kaustubh | Mass spectrometer ThermoFisher Scientific 253plus gas coupled to a KIEL IV carbonate preparation device | Average IOVA |
| 18 | Ostracoda, δ13C, standard deviation | Ostrac δ13C std dev | ± | Thirumalai, Kaustubh | Mass spectrometer ThermoFisher Scientific 253plus gas coupled to a KIEL IV carbonate preparation device | Average IOVA |
| 19 | Ostracoda, δ18O | Ostrac δ18O | ‰ PDB | Thirumalai, Kaustubh | Mass spectrometer ThermoFisher Scientific 253plus gas coupled to a KIEL IV carbonate preparation device | Average IOVA |
| 20 | Ostracoda, δ18O, standard deviation | Ostrac δ18O std dev | ± | Thirumalai, Kaustubh | Mass spectrometer ThermoFisher Scientific 253plus gas coupled to a KIEL IV carbonate preparation device | Average IOVA |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
243 data points