A5086378229- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Isotope Analysis in Ecology
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Geological Modeling and Analysis
- Geological formations and processes
- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Pacific and Southeast Asian Studies
- Marine and environmental studies
- Marine Biology and Ecology Research
- Paleontology and Stratigraphy of Fossils
- Climate variability and models
- Pleistocene-Era Hominins and Archaeology
- Geological and Geochemical Analysis
- Geochemistry and Elemental Analysis
- Microbial Community Ecology and Physiology
- earthquake and tectonic studies
- Ocean Acidification Effects and Responses
- Coastal wetland ecosystem dynamics
- Atmospheric and Environmental Gas Dynamics
- Geological and Tectonic Studies in Latin America
- Archaeology and ancient environmental studies
University of Bremen
2016-2025
St. Joseph’s University Medical Center
2024
GFZ Helmholtz Centre for Geosciences
2006
The Edgbaston Hospital
1953
Results from sediment trap experiments conducted in the seasonal upwelling area off south Java November 2000 until July 2003 revealed significant monsoon‐, El Niño–Southern Oscillation–, and Indian Ocean Dipole–induced interannual variations flux shell geochemistry of planktonic foraminifera. Surface net primary production rates together with total species‐specific foraminiferal were highest during SE monsoon‐induced coastal period to October, three species Globigerina bulloides ,...
Shell chemistry of planktic foraminifera and the alkenone unsaturation index in 69 surface sediment samples tropical eastern Indian Ocean off West South Indonesia were studied. Results compared to modern hydrographic data order assess how environmental conditions are preserved sedimentary record, determine best possible proxies reconstruct seasonality, thermal gradient upper water column characteristics this part world ocean. Our results imply that alkenone‐derived temperatures record annual...
[1] Upper water column dynamics in the southern South China Sea were reconstructed order to track changes activity of East Asian winter monsoon (EAWM) since Last Glacial Maximum. We used difference stable oxygen isotopes (Δδ18O) and Mg/Ca-based temperatures (ΔT) surface-dwelling (G. ruber) thermocline-dwelling (P. obliquiloculata) planktonic foraminifera temperature between alkenone- P. obliquiloculata estimate upper ocean thermal gradient at International Marine Past Global Change Study...
Evidence from geologic archives suggests that there were large changes in the tropical hydrologic cycle associated with two prominent northern hemisphere deglacial cooling events, Heinrich Stadial 1 (HS1; ∼19 to 15 kyr BP; BP = 1000 yr before present) and Younger Dryas (∼12.9 11.7 BP). These shifts have been alternatively attributed high low latitude origin. Here, we present a new record of variability based on planktic foraminifera-derived δ18O seawater (δ18Osw) estimates sediment core...
In spite of the important role played by Southern Ocean in global climate, few existing paleoceanographic records east Pacific sector do not extend beyond one glacial‐interglacial cycle, hindering circumpolar comparison past sea surface temperature (SST) evolution Ocean. Here we present three alkenone‐based Pleistocene SST from subantarctic and subtropical Pacific. We use a regional core top calibration data set to constrain choice calibrations for paleo estimation. Our confirm that U K 37...
The Indo-Pacific Warm Pool (IPWP) is a key site for the global hydrologic cycle, and modern observations indicate that both Indian Ocean Zonal Mode (IOZM) El Niño Southern Oscillation exert strong influence on its regional characteristics. Detailed insight into natural range of IPWP dynamics underlying climate mechanisms is, however, limited by spatial temporal coverage data. In particular, long-term (multimillennial) precipitation patterns western IPWP, location IOZM dynamics, are poorly...
Abstract Mg/Ca and stable oxygen isotope compositions (δ 18 O) of planktic foraminifera tests are commonly used as proxies to reconstruct past ocean conditions including variations in the vertical water column structure. Accurate proxy calibrations require thorough regional studies, since parameters such calcification depth temperature depend on local environmental conditions. Here we present radiocarbon‐dated, modern surface sediment samples data (temperature, salinity, seawater δ from...
Dynamics driving the El Niño-Southern Oscillation (ENSO) over longer-than-interannual time scales are poorly understood. Here, we compile thermocline temperature records of Indo-Pacific warm pool past 25,000 years, which reveal a major warming in Early Holocene and secondary Middle Holocene. We suggest that first corresponds to heat transport southern Pacific shallow overturning circulation driven by June (austral winter) insolation maximum. The second follows equatorial September maximum,...