A5047448597- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Geochemistry and Elemental Analysis
- Geological and Geochemical Analysis
- Geological formations and processes
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Geologic Mapping
- Geological and Geophysical Studies Worldwide
- Radioactive element chemistry and processing
- Analytical chemistry methods development
- Drilling and Well Engineering
- Geological Studies and Exploration
- Remote Sensing in Agriculture
- Geological and Geophysical Studies
- Reservoir Engineering and Simulation Methods
- Methane Hydrates and Related Phenomena
- Paleontology and Evolutionary Biology
- Offshore Engineering and Technologies
- Climate change impacts on agriculture
- Marine and environmental studies
- Marine Biology and Ecology Research
- Remote Sensing and Land Use
- Atmospheric and Environmental Gas Dynamics
- Soil and Water Nutrient Dynamics
- Heavy metals in environment
Kingston University
2014-2023
World Meteorological Organization
2018-2023
Grantmakers for Effective Organizations
2022
PerkinElmer (United States)
2022
PerkinElmer (Ireland)
2022
Kingston University
2022
Trinity College Dublin
2018
Institute of Arctic and Alpine Research
2018
University of Colorado Boulder
2018
University of Lausanne
2018
Carbon stable-isotope variation through the Cenomanian–Santonian stages is characterized using data for 1769 bulk pelagic carbonate samples collected from seven Chalk successions in England. The sections show consistent stratigraphic trends and δ 13 C values that provide a basis high-resolution correlation. Positive negative excursions inflection points on isotope profiles are used to define 72 events. Key markers provided by positive of up +2‰: Albian/Cenomanian Boundary Event;...
Oceanic Anoxic Event 2 (OAE2), spanning the Cenomanian‐Turonian boundary (CTB), represents one of largest perturbations in global carbon cycle last 100 Myr. The δ 13 C carb , org and 18 O chemostratigraphy a black shale–bearing CTB succession Vocontian Basin France is described correlated at high resolution to European reference section Eastbourne, England, successions Germany, equatorial midlatitude proto‐North Atlantic, U.S. Western Interior Seaway (WIS). Δ (offset between ) shown be good...
Raman spectrometry is a rapid, non-destructive alternative to conventional tools employed assess the thermal alteration of organic matter (OM). may be used determine vitrinite reflectance equivalent OM maturity values for petroleum exploration, provide temperature data metamorphic studies, and maximum temperatures reached in fault zones. To achieve wider utilisation Raman, spectrum processing method, positions nomenclature bands parameters, all need standardized. We most widely parameters as...
High-resolution osmium (Os) isotope stratigraphy across the Cenomanian–Turonian Boundary Interval from 6 sections for four transcontinental settings has produced a record of seawater chemistry that demonstrates regional variability as function terrestrial and hydrothermal inputs, revealing impact palaeoenvironmental processes. In every section 187Os/188Os profiles show comparable trend; radiogenic values in lead up to Oceanic Anoxic Event 2 (OAE 2); an abrupt unradiogenic trend at onset OAE...
An oxygen-rich atmosphere is essential for complex animals. The early Earth had an anoxic atmosphere, and understanding the rise maintenance of high O2 levels critical investigating what drove our own evolution assessing likely habitability exoplanets. A growing number techniques aim to reproduce changes in over Phanerozoic Eon (the past 539 million years). We assess these methods attempt draw reliable together form a consensus curve. conclude that probably made up around 5–10% during...
Mercury (Hg) is increasingly being used as a sedimentary tracer of Large Igneous Province (LIP) volcanism, and supports hypotheses coincidence between the formation several LIPs episodes mass extinction major environmental perturbation. However, numerous important questions remain to be answered before Hg can claimed an unequivocal fingerprint LIP well understanding why some records document clear enrichment signals whilst others do not. Of particular importance evaluating impact different...
Remotely sensed Earth observations (EO) have their history firmly rooted in agricultural monitoring, and more recently with applications food production, security, sustainable agriculture. Still, after than 45 years of observing the Earth's land surface, usage EO data by operational monitoring entities concerned global agriculture is uneven. One reason for this a gap continuous communication collaboration between those who undertake research development methods cropland assessment mandate to...
Accurate cropland information is of paramount importance for crop monitoring. This study compares five existing mapping methodologies over contrasting Joint Experiment Crop Assessment and Monitoring (JECAM) sites medium to large average field size using the time series 7-day 250 m Moderate Resolution Imaging Spectroradiometer (MODIS) mean composites (red near-infrared channels). Different strategies were devised assess accuracy classification methods: confusion matrices derived indicators...
Understanding the state and trends in agriculture production is essential to combat both short-term long-term threats stable reliable access food for all, ensure a profitable agricultural sector. In 2007, Agriculture Agri-Food Canada (AAFC) took its first steps towards development of an operational software system mapping crop types individual fields using satellite observations. Focusing on Prairie Provinces 2009 2010, Decision Tree (DT) based methodology was applied optical (Landsat-5,...
• Crop Monitor provides consensus crop assessments for countries at risk. The goal is to reduce ambiguity in food security decisions. Achieved through international coordination sharing of data, methods and expertise EO play key role early warning especially Early reduced production component SDG2 Zero Hunger.
Laser Raman spectroscopy is used to assess the thermal maturity of organic matter in sedimentary rocks, particularly organic-rich mudstones. However, discrepancies exist between quantified spectral parameters and values obtained by vitrinite reflectance. This has prevented adoption a standard protocol for determination (OM) spectroscopy. We have examined factors influencing spectra from low-maturity OM potential shale gas reservoir rocks. The inconsistencies results are due three main that...
The elemental (Si, Ti, Al, Mn, Ca, Zr) and carbon stable-isotope (δ 13 C) geochemistry of a biostratigraphically well-constrained Cenomanian–Turonian (Upper Cretaceous) Chalk succession on the Isle Wight, southern England, shows systematic variation that corresponds closely to published sequence stratigraphic model for Cenomanian. Six sequences their constituent systems tracts, defined elsewhere using sedimentological criteria, are clearly distinguishable from bulk-sediment profiles, an...
Synthetic multielement solutions of the platinum group metals (PGE: Ru; Rh; Pd; Ir; Pt) and gold, with analysis by ICP-AES ICP-MS, have been used to study behaviour precious on Dowex 1-X8 resin. Simple precious-metal chlorocomplexes showed near-complete adsorption (>99%) most elements, only minor breakthrough Ru (≈5%). Solutions pre-treated acid mixtures typically decompose geological samples, demonstrated that perchloric adversely affects PGEs treated HF–HNO 3 –HCl maintained good retention...
Abstract Carbon (δ 13 C org , δ carb ) and oxygen 18 O isotope records are presented for an expanded Upper Cretaceous (Turonian–Coniacian) hemipelagic succession cored in the central Bohemian Basin, Czech Republic. Geophysical logs, biostratigraphy stable carbon chemostratigraphy provide a high‐resolution stratigraphic framework. The profiles compared, time series correlated with published coeval marine non‐marine from Europe, North America Japan. All previously named Turonian events...
Abstract Carbon sources and sinks are key components of the climate feedback system, yet their response to external forcing remains poorly constrained, particularly for past greenhouse climates. Carbon‐isotope data indicate systematic, million‐year‐scale transfers carbon between surface reservoirs during immediately after Late Cretaceous thermal maximum (peaking in Cenomanian‐Turonian, circa 97–91 million years, Myr, ago). Here we calibrate Albian Campanian (108–72 Myr ago) high‐resolution...