Chang, Yuan-Pin; Chen, Min-Te; Yokoyama, Yusuke; Matsuzaki, Hiroyuki; Thompson, William G; Kao, Shuh-Ji; Kawahata, Hodaka (2009): (Table 1) Age determination of sediment core MD01-2404 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.831672, Supplement to: Chang, Y-P et al. (2009): Monsoon hydrography and productivity changes in the East China Sea during the past 100,000 years: Okinawa Trough evidence (MD012404). Paleoceanography, 24(3), PA3208, https://doi.org/10.1029/2007PA001577
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Abstract:
We analyzed the high-resolution foraminifer isotope records, total organic carbon (TOC), and opal content from an Okinawa Trough core MD012404 in order to estimate the monsoon hydrography and productivity changes in the East China Sea (ECS) of the tropical western Pacific over the past 100,000 years. The variability shown in the records on orbital time scales indicates that high TOC intervals coincide with the increases of boreal May-September insolation driven by precession cycles (~21 ka), implying a strong connection to the variations in monsoons. We also observed possibly nearly synchronous, millennial-scale changes of the ECS surface hydrography (mainly driven by salinity changes but also by temperature effects) and productivity coincident with monsoon events in the Hulu/Dongge stalagmite isotope records. We found that increased freshening and high productivity correlate with high monsoon intensity in interstadials. This study suggests that the millennial-scale changes in monsoon hydrography and productivity in the ECS are remarkable and persistent features over the past 100,000 years.
Coverage:
Latitude: 26.647300 * Longitude: 125.812000
Date/Time Start: 2001-05-28T22:38:00 * Date/Time End: 2001-05-28T22:38:00
Minimum DEPTH, sediment/rock: 0.145 m * Maximum DEPTH, sediment/rock: 40.945 m
Event(s):
MD01-2404 (MD012404) * Latitude: 26.647300 * Longitude: 125.812000 * Date/Time: 2001-05-28T22:38:00 * Elevation: -1500.0 m * Recovery: 43.67 m * Location: East China Sea, Pacific Ocean * Campaign: MD122 (IMAGES VII - WEPAMA) * Basis: Marion Dufresne (1995) * Method/Device: Giant piston corer (GPC) * Comment: Water depth: 1397 m
Comment:
Nineteen AMS 14C dated points were calibrated by using Fairbanks et al.'s (2005, doi:10.1016/j.quascirev.2005.04.007) function. The remaining seven points were graphic correlations based upon Martinson et al.'s (1987, doi:10.1016/0033-5894(87)90046-9) data set that tuned by orbital forcing.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Age, dated | Age dated | ka | Chang, Yuan-Pin | Age, 14C AMS | |
| 3 | Age, dated standard deviation | Age dated std dev | ± | Chang, Yuan-Pin | Age, 14C AMS | |
| 4 | Calendar age | Cal age | ka BP | Chang, Yuan-Pin | ||
| 5 | Age, dated material | Dated material | Chang, Yuan-Pin | |||
| 6 | Isotopic event | Isotopic event | Chang, Yuan-Pin | MIS = marine isotope stage |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
90 data points
Data
| 1 Depth sed [m] | 2 Age dated [ka] | 3 Age dated std dev [±] | 4 Cal age [ka BP] | 5 Dated material | 6 Isotopic event |
|---|---|---|---|---|---|
| 0.145 | 1.04 | 0.070 | 0.769 | Globigerinoides sacculifer | |
| 1.045 | 2.35 | 0.030 | 2.193 | Globigerinoides sacculifer + G. ruber | |
| 2.545 | 4.50 | 0.110 | 4.891 | Globigerinoides sacculifer | |
| 3.495 | 6.45 | 0.030 | 7.202 | Globigerinoides sacculifer + G. ruber | |
| 4.945 | 9.73 | 0.120 | 10.863 | Globigerinoides sacculifer | |
| 5.895 | 10.82 | 0.190 | 12.585 | Globigerinoides sacculifer | |
| 6.245 | 11.37 | 0.040 | 13.112 | Globigerinoides sacculifer + G. ruber | |
| 7.445 | 12.68 | 0.130 | 14.620 | Globigerinoides sacculifer | |
| 8.545 | 13.95 | 0.090 | 16.514 | Globigerinoides sacculifer | |
| 9.045 | 14.56 | 0.045 | 17.407 | Globigerinoides sacculifer + G. ruber | |
| 10.195 | 15.81 | 0.160 | 18.843 | Globigerinoides sacculifer | |
| 11.945 | 19.52 | 0.230 | 23.057 | Globigerinoides sacculifer | |
| 13.795 | 21.36 | 0.070 | 25.382 | Globigerinoides sacculifer + G. ruber | |
| 14.545 | 23.23 | 0.270 | 27.561 | Globigerinoides sacculifer | |
| 15.395 | 24.45 | 0.490 | 28.912 | Globigerinoides sacculifer | |
| 17.195 | 27.97 | 0.200 | 32.554 | Globigerinoides sacculifer + G. ruber | |
| 19.145 | 30.20 | 0.230 | 35.051 | Globigerinoides sacculifer + G. ruber | |
| 20.745 | 32.49 | 1.110 | 37.252 | Globigerinoides sacculifer + G. ruber | |
| 21.745 | 34.01 | 0.280 | 38.830 | Globigerinoides sacculifer + G. ruber | |
| 24.295 | 43.880 | MIS 3.13 | |||
| 28.095 | 50.210 | MIS 3.3 | |||
| 30.045 | 55.450 | MIS 3.31 | |||
| 31.395 | 64.090 | MIS 4.22 | |||
| 34.745 | 70.820 | MIS 4.24 | |||
| 38.245 | 79.250 | MIS 5.1 | |||
| 40.945 | 90.950 | MIS 5.2 |