Jonkers, Lukas: Planktonic foraminifera δ18O, Mg/Ca and UK37 ratios and benthic foraminifera δ18O of sediment core MD97-2125 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.965906 (dataset in review)
Abstract:
To derive and age-depth model radiocarbon ages were measured on the planktonic foraminifera species Globigerinoides ruber alba. Stable oxygen isotope ratios were measured on planktonic and benthic foraminifera. For benthic d18O measurements were done on 5-7 specimens of Cibicides wuellerstorfi from the 250-355 micrometer size fraction. Two species of planktonic foraminifera were analysed: Globigerinoides ruber alba and Trilobatus sacculifer. 5-7 shells from the 250-355 micrometer size fraction were analysed. Mg/Ca ratios were measured on the same two planktonic foraminifera species. For the Mg/Ca measurements 30 specimens were used that were cleaned using an oxidative cleaning procedure. Seawater temperatures were calculated using T = ln(Mg/Ca/0.102)/0.31 (doi:10.1029/2002PA000846) for G. ruber alba and T = ln(Mg/Ca/0.09)/0.37 (doi:10.1029/2001GC000200) for T. sacculifer. Since the latter calibration was established using the Cd cleaning, a correction of -8 % was applied prior to Mg/Ca-SST conversion. Additional seawater temperature estimates were calculated from UK37' ratios which were converted to SST using T (°C) = -0.957 (54.293 * Uk'37) - (52.894 (Uk'37)^2) (28.321 (Uk'37)^3) (doi:10.1029/2005GC001054).
Keyword(s):
Related to:
Tachikawa, Kazuyo; Vidal, Laurence; Sonzogni, Corinne; Bard, Edouard (2009): Glacial/interglacial sea surface temperature changes in the Southwest Pacific ocean over the past 360ka. Quaternary Science Reviews, 28(13-14), 1160-1170, https://doi.org/10.1016/j.quascirev.2008.12.013
Coverage:
Latitude: -22.342000 * Longitude: 161.442000
Minimum DEPTH, sediment/rock: 0.01 m * Maximum DEPTH, sediment/rock: 12.51 m
Event(s):
MD97-2125 (MD972125) * Latitude: -22.342000 * Longitude: 161.442000 * Recovery: 33.98 m * Campaign: MD106 (IMAGES III - IPHIS) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO)
Comment:
Quote from article: Since the depth interval corresponding to MIS 2 and MIS 3 (corresponding to 25–60 ka interval) was probably disturbed during coring process, we omit to interpret this interval.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Jonkers, Lukas | Geocode – merged | |
| 2 | AGE | Age | ka BP | Jonkers, Lukas | Geocode | |
| 3 | Globigerinoides ruber white, Magnesium/Calcium ratio | G. ruber w Mg/Ca | mmol/mol | Jonkers, Lukas | Inductively coupled plasma–optical emission spectrometer (ICP-OES), Jobin Yvon Ultima, C | |
| 4 | Sea surface temperature, annual mean | SST (1-12) | °C | Jonkers, Lukas | Calculated from Mg/Ca ratios (Anand et al., 2003) | Mg/Ca = 0.31 exp (0.102*T) |
| 5 | Globigerinoides ruber white, δ18O | G. ruber w δ18O | ‰ PDB | Jonkers, Lukas | Mass spectrometer Finnigan Delta Plus | |
| 6 | AGE | Age | ka BP | Jonkers, Lukas | Geocode | |
| 7 | Trilobatus sacculifer, Magnesium/Calcium ratio | T. sacculifer Mg/Ca | mmol/mol | Jonkers, Lukas | Inductively coupled plasma–optical emission spectrometer (ICP-OES), Jobin Yvon Ultima, C | |
| 8 | Sea surface temperature, annual mean | SST (1-12) | °C | Jonkers, Lukas | Calculated from Mg/Ca ratios (Dekens et al. 2002) | Mg/Ca = 0.37 exp (0.09*T). As the calibration of Dekens et al. (2002) was established using the Cd cleaning, a correction of -8 % was applied prior to Mg/Ca-SST conversion. |
| 9 | Trilobatus sacculifer, δ18O | T. sacculifer δ18O | ‰ PDB | Jonkers, Lukas | Inductively coupled plasma–optical emission spectrometer (ICP-OES), Jobin Yvon Ultima, C | |
| 10 | AGE | Age | ka BP | Jonkers, Lukas | Geocode | |
| 11 | Alkenone, unsaturation index UK37 | UK37 | Jonkers, Lukas | Measured | ||
| 12 | Sea surface temperature, annual mean | SST (1-12) | °C | Jonkers, Lukas | Calculated from UK37 (Conte et al., 2006) | T (°C) = -0.957 + (54.293 * Uk'37) - (52.894 * (Uk'37)^2) + (28.321 * (Uk'37)^3) |
| 13 | AGE | Age | ka BP | Jonkers, Lukas | Geocode | |
| 14 | Cibicides wuellerstorfi, δ18O | C. wuellerstorfi δ18O | ‰ PDB | Jonkers, Lukas | Mass spectrometer Finnigan Delta Plus |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1110 data points