Toyofuku, Takashi; Kitazato, Hiroshi; Kawahata, Hodaka; Tsuchiya, Masashi; Nohara, Masato (2000): (Table 1) Temperature and foraminiferal Mg/Ca ratios of samples off Japan [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.855309, Supplement to: Toyofuku, T et al. (2000): Evaluation of Mg/Ca thermometry in foraminifera: Comparison of experimental results and measurements in nature. Paleoceanography, 15(4), 456-464, https://doi.org/10.1029/1999PA000460
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Abstract:
We studied Mg/Ca in high-Mg, shallow-water benthic foraminifera in culture and in samples from natural environments, in order to evaluate the expression of latitudinal and seasonal temperature variability in Mg/Ca in their tests. We cultured Planoglabratella opercularis (d'Orbigny) and Quinqueloculina yabei Asano under controlled temperature (10°-25°C) and salinity (30-38) conditions. Both species show a linear correlation between Mg/Ca and temperature, but they differ in temperature sensitivity. Salinity does not significantly influence Mg/Ca. In the samples collected in nature, Mg/Ca and seawater temperatures are positively correlated, but there are more complexities than in the records for cultured specimens due to such factors as seasonal fluctuations in temperature. We conclude that Mg/Ca ratios in monospecific benthic foraminiferal samples may be used as a reliable temperature proxy, if the lifetime of the species is taken into account.
Coverage:
Median Latitude: 36.708333 * Median Longitude: 136.416667 * South-bound Latitude: 31.666670 * West-bound Longitude: 130.250000 * North-bound Latitude: 43.833330 * East-bound Longitude: 141.500000
Date/Time Start: 1987-05-17T00:00:00 * Date/Time End: 1997-07-21T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
Echizen-Matsushima * Latitude: 36.000000 * Longitude: 136.000000 * Date/Time: 1997-07-17T00:00:00 * Location: off Japan * Method/Device: Sampling by hand (HAND)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Toyofuku, Takashi | |||
| 2 | Latitude of event | Latitude | Toyofuku, Takashi | |||
| 3 | Longitude of event | Longitude | Toyofuku, Takashi | |||
| 4 | DATE/TIME | Date/Time | Toyofuku, Takashi | Geocode | ||
| 5 | DEPTH, sediment/rock | Depth sed | m | Toyofuku, Takashi | Geocode | |
| 6 | Habitat | Habitat | Toyofuku, Takashi | |||
| 7 | Temperature, water | Temp | °C | Toyofuku, Takashi | average | average of 30 days |
| 8 | Magnesium/Calcium ratio | Mg/Ca | mmol/mol | Toyofuku, Takashi | Planoglobratella opercularis | |
| 9 | Temperature, calculated | T cal | °C | Toyofuku, Takashi | Calculated from Mg/Ca ratios | Planoglobratella opercularis |
| 10 | Magnesium/Calcium ratio | Mg/Ca | mmol/mol | Toyofuku, Takashi | Quinqueloculina yabei | |
| 11 | Temperature, calculated | T cal | °C | Toyofuku, Takashi | Calculated from Mg/Ca ratios | Quinqueloculina yabei |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
70 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Date/Time | 5 Depth sed [m] | 6 Habitat | 7 Temp [°C] (average of 30 days, average) | 8 Mg/Ca [mmol/mol] (Planoglobratella opercularis) | 9 T cal [°C] (Planoglobratella opercularis,...) | 10 Mg/Ca [mmol/mol] (Quinqueloculina yabei) | 11 T cal [°C] (Quinqueloculina yabei, Calcul...) |
|---|---|---|---|---|---|---|---|---|---|---|
| Omaezaki | 34.6667 | 138.2500 | 1987-05-17 | 0 | tide pool | 17.2 | 122.30 | 14.7 | 111.70 | 15.8 |
| Omaezaki | 34.6667 | 138.2500 | 1987-07-12 | 0 | tide pool | 22.6 | 135.60 | 20.6 | 126.10 | 20.7 |
| Omaezaki | 34.6667 | 138.2500 | 1987-09-20 | 0 | tide pool | 25.7 | 144.70 | 24.6 | 116.90 | 17.6 |
| Omaezaki | 34.6667 | 138.2500 | 1987-11-23 | 0 | tide pool | 18.7 | 125.40 | 16.1 | 112.00 | 15.9 |
| Omaezaki | 34.6667 | 138.2500 | 1988-01-21 | 0 | tide pool | 14.8 | 113.70 | 10.9 | 109.80 | 15.1 |
| Omaezaki | 34.6667 | 138.2500 | 1988-03-19 | 0 | tide pool | 11.7 | 110.00 | 9.3 | 95.20 | 10.1 |
| Omaezaki | 34.6667 | 138.2500 | 1988-05-20 | 0 | tide pool | 17.2 | 115.30 | 11.6 | 102.30 | 12.6 |
| Rumoi | 43.8333 | 141.5000 | 1997-06-27 | 0 | rocky shore | 14.2 | 120.81 | 14.0 | 100.68 | 12.0 |
| Tsuruka | 38.5833 | 139.8333 | 1997-06-29 | 0 | rocky shore | 17.7 | 129.89 | 18.0 | 105.61 | 13.7 |
| Echizen-Matsushima | 36.0000 | 136.0000 | 1997-07-17 | 0 | tide pool | 20.9 | 132.64 | 19.3 | 106.35 | 13.9 |
| Taisha | 35.5000 | 132.6667 | 1997-07-18 | 0 | rocky shore | 22.6 | 130.98 | 18.5 | 117.11 | 17.6 |
| Kushikino | 31.6667 | 130.2500 | 1997-07-21 | 0 | tide pool | 25.2 | 122.80 | 19.6 |