Khider, D; Stott, Lowell D; Emile-Geay, J; Thunell, Robert C; Hammond, Douglas E (2011): Stable isotope record of sediment core MD98-2177 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.830589, Supplement to: Khider, D et al. (2011): Assessing El Niño Southern Oscillation variability during the past millennium. Paleoceanography, 26(3), PA3222, https://doi.org/10.1029/2011PA002139
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Abstract:
We present a reconstruction of El Niño Southern Oscillation (ENSO) variability spanning the Medieval Climate Anomaly (MCA, A.D. 800-1300) and the Little Ice Age (LIA, A.D. 1500-1850). Changes in ENSO are estimated by comparing the spread and symmetry of d18O values of individual specimens of the thermocline-dwelling planktonic foraminifer Pulleniatina obliquiloculata extracted from discrete time horizons of a sediment core collected in the Sulawesi Sea, at the edge of the western tropical Pacific warm pool. The spread of individual d18O values is interpreted to be a measure of the strength of both phases of ENSO while the symmetry of the d18O distributions is used to evaluate the relative strength/frequency of El Niño and La Niña events. In contrast to previous studies, we use robust and resistant statistics to quantify the spread and symmetry of the d18O distributions; an approach motivated by the relatively small sample size and the presence of outliers. Furthermore, we use a pseudo-proxy approach to investigate the effects of the different paleo-environmental factors on the statistics of the d18O distributions, which could bias the paleo-ENSO reconstruction. We find no systematic difference in the magnitude/strength of ENSO during the Northern Hemisphere MCA or LIA. However, our results suggest that ENSO during the MCA was skewed toward stronger/more frequent La Niña than El Niño, an observation consistent with the medieval megadroughts documented from sites in western North America.
Coverage:
Latitude: 1.400000 * Longitude: 119.080000
Event(s):
MD98-2177 (MD982177) * Latitude: 1.400000 * Longitude: 119.080000 * Elevation: -968.0 m * Recovery: 32.14 m * Campaign: MD111 (IMAGES IV-IPHIS III) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Khider, D; Stott, LD; Emile-Geay, J et al. (2011): (Table 2) Age determination of sediment core MD98-2177. https://doi.org/10.1594/PANGAEA.830587
- Khider, D; Stott, LD; Emile-Geay, J et al. (2011): (Table S1) Stable carbon and oxygen isotope ratios of Pulleniatina obliquiloculata of sediment core MD98-2177. https://doi.org/10.1594/PANGAEA.830586
- Khider, D; Stott, LD; Emile-Geay, J et al. (2011): (Table 3) Lead 214 and Lead 210 concentration of sediment core MD98-2177. https://doi.org/10.1594/PANGAEA.830588