Steinke, Stephan; Prange, Matthias; Feist, Christin; Groeneveld, Jeroen; Mohtadi, Mahyar (2014): Planktonic foraminifera Mg/Ca-based temperatures and planktonic foraminiferal cenus counts of core GeoB10065-7 (Lombok Basin, Indonesia). PANGAEA, https://doi.org/10.1594/PANGAEA.837601, Supplement to: Steinke, S et al. (2014): Upwelling variability off southern Indonesia over the past two millennia. Geophysical Research Letters, 41(21), 7684-7693, https://doi.org/10.1002/2014GL061450
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Modern variability in upwelling off southern Indonesia is strongly controlled by the Australian-Indonesian monsoon and the El Niño-Southern Oscillation, but multi-decadal to centennial-scale variations are less clear. We present high-resolution records of upper water column temperature, thermal gradient and relative abundances of mixed layer- and thermocline-dwelling planktonic foraminiferal species off southern Indonesia for the past two millennia that we use as proxies for upwelling variability. We find that upwelling was generally strong during the Little Ice Age (LIA) and weak during the Medieval Warm Period (MWP) and the Roman Warm Period (RWP). Upwelling is significantly anti-correlated to East Asian summer monsoonal rainfall and the zonal equatorial Pacific temperature gradient. We suggest that changes in the background state of the tropical Pacific may have substantially contributed to the centennial-scale upwelling trends observed in our records. Our results implicate the prevalence of an El Niño-like mean state during the LIA and a La Niña-like mean state during the MWP and the RWP.
Latitude: -9.223670 * Longitude: 118.893500
Date/Time Start: 2005-09-05T05:11:00 * Date/Time End: 2005-09-05T05:11:00
Datasets listed in this publication series
- Prange, M; Feist, C; Groeneveld, J et al. (2014): Mg/Ca ratios and temperature from the planktonic foraminiferal species Globigerina bulloides of sediment core GeoB10065-7. https://doi.org/10.1594/PANGAEA.837596
- Steinke, S; Prange, M; Feist, C et al. (2014): Difference in Mg/Ca-based temperatures from the planktonic foraminiferal species Globigerina bulloides and Pulleniatina obliquiloculata of sediment core GeoB10065-7. https://doi.org/10.1594/PANGAEA.837599
- Steinke, S; Prange, M; Feist, C et al. (2014): Mg/Ca ratios and temperature from the planktonic foraminiferal species Pulleniatina obliquiloculata of sediment core GeoB10065-7. https://doi.org/10.1594/PANGAEA.837597
- Steinke, S; Prange, M; Feist, C et al. (2014): Relative abundances from mixed layer-dwelling planktonic foraminifera and thermocline-dwelling species of sediment core GeoB10065-7. https://doi.org/10.1594/PANGAEA.837600