Bolton, Clara T; Chang, Liao; Clemens, Steven C; Kodama, Kazuto; Ikehara, Minoru; Medina-Elizalde, Martín; Paterson, Greig A; Roberts, Andrew P; Rohling, Eelco J; Yamamoto, Yuhji; Zhao, Xiang (2013): Benthic and planktic foraminiferal stable isotope record and coccolith abundance spanning the last 500,000 years of ODP Hole 121-758C [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.819219, Supplement to: Bolton, CT et al. (2013): A 500,000 year record of Indian summer monsoon dynamics recorded by eastern equatorial Indian Ocean upper water-column structure. Quaternary Science Reviews, 77, 167-180, https://doi.org/10.1016/j.quascirev.2013.07.031
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
The Indian Summer Monsoon (ISM) is an inter-hemispheric and highly variable ocean-atmosphere-land interaction that directly affects the densely populated Indian subcontinent. Here, we present new records of palaeoceanographic variability that span the last 500,000 years from the eastern equatorial Indian Ocean, a relatively under-sampled area of ISM influence. We have generated carbon and oxygen stable isotope records from three foraminiferal species from Ocean Drilling Program Site 758 (5°N, 90°E) to investigate the oceanographic history of this region. We interpret our resultant Dd18O (surface-thermocline) record of upper water-column stratification in the context of past ISM variability, and compare orbital phase relationships in our Site 758 data to other climate and monsoon proxies in the region. Results suggest that upper water-column stratification at Site 758, which is dominated by variance at precession and half-precession frequencies (23, 19 and 11 ka), is forced by both local (5°N) insolation and ISM winds. In the precession (23 ka) band, stratification minima at Site 758 lag northern hemisphere summer insolation maxima (precession minima) by 9 ka, which is consistent with Arabian Sea ISM phase estimates and suggests a common wind forcing in both regions. This phase implicates a strong sensitivity to both ice volume and southern hemisphere insolation forcing via latent heat export from the southern subtropical Indian Ocean. Additionally, we find evidence of possible overprinting of millennial-scale events during glacial terminations in our stratification record, which suggests an influence of remote abrupt climate events on ISM dynamics.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 5.384000 * Longitude: 90.361100
Date/Time Start: 1988-06-15T15:58:00 * Date/Time End: 1988-06-15T23:50:00
Event(s):
121-758C * Latitude: 5.384000 * Longitude: 90.361100 * Date/Time Start: 1988-06-15T15:58:00 * Date/Time End: 1988-06-15T23:50:00 * Elevation: -2933.0 m * Penetration: 9.4 m * Recovery: 9.4 m * Location: Indian Ocean * Campaign: Leg121 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 9.4 m cored; 0 m drilled; 100 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets
Download Data
Datasets listed in this publication series
- Bolton, CT; Chang, L; Clemens, SC et al. (2013): Age model of ODP Hole 121-758C. https://doi.org/10.1594/PANGAEA.819214
- Bolton, CT; Chang, L; Clemens, SC et al. (2013): Benthic foraminiferal stable oxygen isotope record of ODP Hole 121-758C. https://doi.org/10.1594/PANGAEA.819213
- Bolton, CT; Chang, L; Clemens, SC et al. (2013): Planktonic foraminiferal Delta δ¹⁸O record of ODP Hole 121-758C. https://doi.org/10.1594/PANGAEA.819217
- Bolton, CT; Chang, L; Clemens, SC et al. (2013): Neogloboquadrina dutertrei stable iostope record of ODP Hole 121-758C. https://doi.org/10.1594/PANGAEA.819216
- Bolton, CT; Chang, L; Clemens, SC et al. (2013): Relative abundance of Florisphaera profunda in ODP Hole 121-758C. https://doi.org/10.1594/PANGAEA.819218
- Bolton, CT; Chang, L; Clemens, SC et al. (2013): Globigerinoides ruber stable iostope record of ODP Hole 121-758C. https://doi.org/10.1594/PANGAEA.819215