A5056646200- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Isotope Analysis in Ecology
- Marine and coastal ecosystems
- Cryospheric studies and observations
- Polar Research and Ecology
- Microbial Community Ecology and Physiology
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- Geological formations and processes
- Paleontology and Stratigraphy of Fossils
- Arctic and Antarctic ice dynamics
- Atmospheric and Environmental Gas Dynamics
- Oceanographic and Atmospheric Processes
- Seismic Imaging and Inversion Techniques
- Marine and environmental studies
- Reservoir Engineering and Simulation Methods
- Geomagnetism and Paleomagnetism Studies
- Protist diversity and phylogeny
- Evolution and Paleontology Studies
- Marine Biology and Ecology Research
- Geochemistry and Geologic Mapping
- Groundwater and Watershed Analysis
- Scientific Research and Discoveries
- Plant Diversity and Evolution
University of Birmingham
2016-2025
Environmental Earth Sciences
2014
Aston University
2013
University of Glasgow
2009-2013
University of Bristol
2010-2012
Hokkaido University
2004-2007
Durham University
2004-2007
The warmest global temperatures of the past 85 million years occurred during a prolonged greenhouse episode known as Early Eocene Climatic Optimum (52–50 Ma). terminated with long-term cooling trend that culminated in continental-scale glaciation Antarctica from 34 Ma onward. Whereas early studies attributed transition to icehouse climates tectonic opening Southern Ocean gateways, more recent investigations invoked dominant role declining atmospheric gas concentrations (e.g., CO 2 )....
The Integrated Ocean Drilling Program Expedition 318 to the Wilkes Land margin of Antarctica recovered a sedimentary succession ranging in age from lower Eocene Holocene. Excellent stratigraphic control is key understanding timing paleoceanographic events through critical climate intervals. Drill sites and middle Eocene, nearly entire Oligocene, Miocene about 17 Ma, Pliocene much Pleistocene. paleomagnetic properties are generally suitable for magnetostratigraphic interpretation, with...
The Amazon basin is a major component of the global carbon and hydrological cycles, significant natural source methane, home to remarkable biodiversity endemism. Reconstructing past climate changes in important for better understanding effect such on these critical functions basin. Using novel biomarker proxy, based membrane lipids soil bacteria with new regional calibration, we present reconstruction mean annual air temperatures catchment during last 37 kyr B.P. Biomarkers were extracted...
We review the approaches for estimating biomass burning from ice-cores and consider challenges assumptions in their application. In particular, we potential of biomarker proxies burning, hitherto not widely applied to glacial ice archives. also available records how variations fire regimes have been related atmospheric land-use changes. Finally, suggest that future developments ice-core science should aim combine multiple biomarkers with other (black carbon, charcoal) models discern types...
Samples of filtered particulate organic matter (POM) were obtained during the summers 1999 and 2000 from surface waters Nordic seas to monitor spatial distribution long‐chain alkenones. The aim study was appraise existing alkenone‐based climatic proxies in northern high latitudes. Unusually percentages tetraunsaturated alkenone measured polar East Greenland Current, with C 37:4 up 77% 80% sea‐ice cover. Values percent across showed a strong association water mass type. Analysis coccoliths...
The palaeoceanography of the northern Icelandic Shelf for Holocene period was reconstructed from alkenone indices measured in core JR51-GC35. This contains a continuous record sedimentation spanning 0 10.2 cal. kyr BP with resolution ~ 20 yr/cm. We have identified general cooling trend that has superimposed millennial-scale oscillations >2°C. Their timing is close agreement glacier advances Iceland. For later half Holocene, alkenone-sea surface temperature (SST) JR51-GC35 correlates proxy...
Abstract In the Arabian Sea, South Asian monsoon (SAM)-induced high surface water productivity coupled with poor ventilation of intermediate results in strong denitrification within oxygen minimum zone (OMZ). Despite significance we have no long-term record its evolution spanning past several million years. Here, present first since Late Miocene (~10.2 Ma) Eastern where SAM generates moderate productivity, based on samples retrieved during International Ocean Discovery Program (IODP)...
Abstract. Antarctica’s terrestrial ecosystems are at risk from a rapidly changing climate. Investigating how vascular plants responded to major climatic variations in the geological past, especially under atmospheric CO2 values similar modern and future projections, may provide insight into organisms could migrate across continent as conditions change. Here, we investigate vegetation trends Oligocene/Miocene Transition (OMT, ~23 Myr), one of largest transient glaciations Cenozoic. Despite...
Speleothems are invaluable archives of past climate variability and offer important insights into monsoon dynamics across Southeast Asia. Different isotope systems have been employed to characterise autumn in this region, but multiple influencing factors render the interpretation proxy records ambiguous. To gain novel regional vegetation temperature changes, proxies required. Here, we combine traditional speleothem stable isotopes (δ¹⁸O...
Hydroclimatic variations on the Tibetan Plateau since Last Glacial Maximum (LGM) are still debated. Here, we reconstruct climatic and hydrological variability in southwestern Tibetan  late LGM using climate proxies based molecular distributions of n-alkanes, hydrogen carbon isotopic composition of terrestrial n-alkanes and δ18Ocarbonate at Lake Zabuye. Our findings indicate that the δD-nC31 signal this lake was...
In this paper we revise the application of U K 37′ and 37 indices as sea surface temperature (SST) proxies in Nordic Seas. summer 1999 2000 obtained samples filtered particulate organic matter (POM) from waters (∼6 m depth) A number were collected polar with up to 80% ice cover. Alkenones detected all major water masses seas, across a spectrum SST values −0.5 13°C SSS 29.6 35.6 (psu). Concentrations alkenones similar magnitude those reported previously for North Atlantic Southern Ocean....