Planktonic foraminifera Mg/Ca-based temperatures and planktonic foraminiferal cenus counts of core GeoB10065-7 (Lombok Basin, Indonesia) ...

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 grad...

Full description

Bibliographic Details
Main Authors: Steinke, Stephan, Prange, Matthias, Feist, Christin, Groeneveld, Jeroen, Mohtadi, Mahyar
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2014
Subjects:
Online Access:https://dx.doi.org/10.1594/pangaea.837601
https://doi.pangaea.de/10.1594/PANGAEA.837601
Description
Summary: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 ... : Supplement to: Steinke, Stephan; Prange, Matthias; Feist, Christin; Groeneveld, Jeroen; Mohtadi, Mahyar (2014): Upwelling variability off southern Indonesia over the past two millennia. Geophysical Research Letters, 41(21), 7684-7693 ...