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
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Elevation [m] | 5 Site | 6 Distance [km] (Distance from Omo inflow) | 7 pH | 8 SST [°C] | 9 BWT [°C] | 10 n [#] (Individual ostracode valve an...) | 11 Ostrac m [mg] (Average shell mass, Ultra-mic...) | 12 Ostrac m std dev [±] (Average shell mass, Ultra-mic...) | 13 Ostrac l [mm] (Average, Digital Zoom Microsc...) | 14 Ostrac l std dev [±] (Average, Digital Zoom Microsc...) | 15 Ostrac l [mm] (Average width, Digital Zoom M...) | 16 Ostrac l std dev [±] (Average width, Digital Zoom M...) | 17 Ostrac δ13C [‰ PDB] (Average IOVA, Mass spectromet...) | 18 Ostrac δ13C std dev [±] (Average IOVA, Mass spectromet...) | 19 Ostrac δ18O [‰ PDB] (Average IOVA, Mass spectromet...) | 20 Ostrac δ18O std dev [±] (Average IOVA, Mass spectromet...) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BS125 | 4.3613 | 36.1988 | -1 | 1 | 50.0 | 9.1 | 13 | 0.166 | 0.039 | 2.078 | 0.115 | 1.074 | 0.219 | -2.88 | 1.09 | 2.49 | 0.45 | ||
| 79-170F | 4.2061 | 35.9535 | -14 | 2 | 65.0 | 9.1 | 27.0 | 26.0 | 22 | 0.249 | 0.036 | 2.135 | 0.050 | 1.124 | 0.033 | -1.82 | 0.84 | 2.85 | 0.38 |
| BS91 | 4.1369 | 36.2127 | -0 | 3 | 74.4 | 7.6 | 19 | 0.228 | 0.024 | 2.085 | 0.071 | 1.065 | 0.049 | -2.21 | 1.23 | 3.15 | 0.43 | ||
| BS90 | 4.1215 | 36.2179 | -0 | 4 | 76.4 | 10.3 | 15 | 0.218 | 0.048 | 2.078 | 0.121 | 1.030 | 0.143 | -2.25 | 1.12 | 3.06 | 0.53 | ||
| 79-168F | 4.0717 | 35.9230 | -15 | 5 | 80.6 | 9.1 | 27.5 | 23.5 | 21 | 0.230 | 0.042 | 2.107 | 0.086 | 1.105 | 0.053 | -1.53 | 0.77 | 3.30 | 0.44 |
| 79-166F | 3.9491 | 35.8664 | -10 | 6 | 94.8 | 9.1 | 29.0 | 27.0 | 15 | 0.194 | 0.037 | 2.073 | 0.103 | 1.087 | 0.031 | -2.44 | 0.68 | 3.00 | 0.28 |
| 79-147F | 3.7723 | 36.2214 | -10 | 7 | 114.3 | 9.0 | 25.0 | 24.7 | 21 | 0.156 | 0.057 | 1.966 | 0.196 | 0.990 | 0.056 | -1.22 | 1.10 | 3.40 | 0.53 |
| 79-164F | 3.7386 | 35.8532 | -16 | 8 | 118.3 | 9.1 | 30.0 | 26.9 | 19 | 0.194 | 0.029 | 2.055 | 0.079 | 1.078 | 0.032 | -1.49 | 1.19 | 3.25 | 0.31 |
| 79-130F | 3.5659 | 35.9087 | -22 | 9 | 136.2 | 27.0 | 26.0 | 21 | 0.228 | 0.033 | 2.092 | 0.084 | 1.106 | 0.051 | -2.00 | 1.15 | 3.19 | 0.53 | |
| 79-77F | 3.5417 | 35.9589 | -29 | 10 | 138.4 | 8.7 | 20 | 0.237 | 0.026 | 2.021 | 0.226 | 1.150 | 0.214 | -1.75 | 0.87 | 3.41 | 0.31 | ||
| 79-158F | 3.4792 | 36.0490 | -27 | 11 | 145.0 | 9.1 | 21 | 0.277 | 0.035 | 2.131 | 0.077 | 1.117 | 0.047 | -2.35 | 0.88 | 3.01 | 0.31 | ||
| 79-160F | 3.4407 | 36.1774 | -37 | 12 | 150.0 | 22 | 0.273 | 0.028 | 2.137 | 0.066 | 1.094 | 0.040 | -0.95 | 0.83 | 3.62 | 0.38 | |||
| 79-183F | 3.3115 | 36.0044 | -21 | 13 | 163.6 | 20 | 0.238 | 0.045 | 2.096 | 0.095 | 1.095 | 0.049 | -1.16 | 1.32 | 3.48 | 0.55 | |||
| 79-189F | 3.0290 | 36.2264 | -31 | 14 | 195.7 | 20 | 0.213 | 0.027 | 2.036 | 0.076 | 1.077 | 0.034 | -1.80 | 1.12 | 3.55 | 0.32 | |||
| 79-204F | 2.8216 | 36.6274 | -59 | 15 | 227.0 | 23 | 0.220 | 0.049 | 2.137 | 0.091 | 1.127 | 0.063 | -1.75 | 1.24 | 4.20 | 0.38 | |||
| 79-193F | 2.7819 | 36.4219 | -59 | 16 | 226.0 | 17 | 0.250 | 0.041 | 2.107 | 0.127 | 1.105 | 0.094 | -1.51 | 0.79 | 3.96 | 0.57 | |||
| 79-194F | 2.7380 | 36.5046 | -62 | 17 | 240.0 | 18 | 0.222 | 0.043 | 2.080 | 0.117 | 1.108 | 0.080 | -0.61 | 0.71 | 4.51 | 0.49 |