Gupta, Anil K; Anderson, David M; Overpeck, Jonathan T (2003): (Table 1) Age determination of ODP Hole 117-723A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.769841, Supplement to: Gupta, AK et al. (2003): Abrupt changes in the Asian southwest monsoon during the Holocene and their links to the North Atlantic Ocean. Nature, 421(6921), 354-357, https://doi.org/10.1038/nature01340
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Abstract:
During the last ice age, the Indian Ocean southwest monsoon exhibited abrupt changes that were closely correlated with millennial-scale climate events in the North Atlantic region (Overpeck et al., 1996, doi:10.1007/BF00211619; Schulz et al., 1998, doi:10.1038/31750; Altabet et al., 2002, doi:10.1038/415159a), suggesting a mechanistic link. In the Holocene epoch, which had a more stable climate, the amplitude of abrupt changes in North Atlantic climate was much smaller, and it has been unclear whether these changes are related to monsoon variability. Here we present a continuous record of centennial-scale monsoon variability throughout the Holocene from rapidly accumulating and minimally bioturbated sediments in the anoxic Arabian Sea. Our monsoon proxy record reveals several intervals of weak summer monsoon that coincide with cold periods documented in the North Atlantic region (Bond et al., 2001, doi:10.1126/science.1065680) -including the most recent climate changes from the Medieval Warm Period to the Little Ice Age and then to the present. We therefore suggest that the link between North Atlantic climate and the Asian monsoon is a persistent aspect of global climate.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 18.051800 * Longitude: 57.609000
Date/Time Start: 1987-09-15T11:45:00 * Date/Time End: 1987-09-17T04:30:00
Minimum DEPTH, sediment/rock: 0.16 m * Maximum DEPTH, sediment/rock: 3.16 m
Event(s):
117-723A * Latitude: 18.051800 * Longitude: 57.609000 * Date/Time Start: 1987-09-15T11:45:00 * Date/Time End: 1987-09-17T04:30:00 * Elevation: -806.0 m * Penetration: 432.3 m * Recovery: 298.29 m * Location: Arabian Sea * Campaign: Leg117 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 46 cores; 432.3 m cored; 0 m drilled; 69 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Laboratory number | Lab. numb | # | Gupta, Anil K | NOSAMS, National Ocean Sciences Acellerator Mass Spectrometer Facility | |
| 2 | Age, dated material | Dated material | Gupta, Anil K | |||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 4 | Age, dated | Age dated | ka | Gupta, Anil K | Age, 14C AMS | |
| 5 | Calendar age | Cal age | ka BP | Gupta, Anil K | Age, 14C calibrated, CALIB (Stuiver & Reimer, 1993) | |
| 6 | Calendar age, standard deviation | Cal age std dev | ± | Gupta, Anil K | Age, 14C calibrated, CALIB (Stuiver & Reimer, 1993) | 1 sigma |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
55 data points
Data
| 1 Lab. numb [#] | 2 Dated material | 3 Depth sed [m] | 4 Age dated [ka] | 5 Cal age [ka BP] | 6 Cal age std dev [±] |
|---|---|---|---|---|---|
| 34259 | Mixed planktics | 0.16 | 1.68 | 1.005 | 0.035 |
| 34260 | Globigerina bulloides & Neogloboquadrina dutertrei | 0.39 | 2.01 | 1.330 | 0.045 |
| 34261 | Globigerina bulloides & Neogloboquadrina dutertrei | 0.64 | 2.76 | 2.254 | 0.030 |
| 34262 | Globigerina bulloides & Neogloboquadrina dutertrei | 0.96 | 3.89 | 3.587 | 0.045 |
| 34263 | Globigerina bulloides | 1.21 | 4.67 | 4.622 | 0.040 |
| 34264 | Globigerina bulloides | 1.54 | 6.00 | 6.202 | 0.030 |
| 34265 | Globigerina bulloides | 1.54 | 6.07 | 6.276 | 0.030 |
| 34266 | Globigerina bulloides | 1.86 | 7.70 | 7.938 | 0.045 |
| 34267 | Globigerina bulloides | 2.18 | 8.11 | 8.359 | 0.040 |
| 34268 | Globigerina bulloides | 2.74 | 9.51 | 9.854 | 0.040 |
| 34269 | Globigerina bulloides | 3.16 | 10.50 | 10.877 | 0.040 |