A5064060376- Geology and Paleoclimatology Research
- Archaeology and ancient environmental studies
- Isotope Analysis in Ecology
- Pacific and Southeast Asian Studies
- Atmospheric and Environmental Gas Dynamics
- Pleistocene-Era Hominins and Archaeology
- Methane Hydrates and Related Phenomena
- Coral and Marine Ecosystems Studies
- Tree-ring climate responses
- Geological and Geophysical Studies
- Cryospheric studies and observations
- Maritime and Coastal Archaeology
- Geological formations and processes
- Metallurgy and Cultural Artifacts
- Marine animal studies overview
- Archaeological Research and Protection
- Forensic Anthropology and Bioarchaeology Studies
- Coastal wetland ecosystem dynamics
- Hydrocarbon exploration and reservoir analysis
- Soil Carbon and Nitrogen Dynamics
- Geological and Geochemical Analysis
- Plant Water Relations and Carbon Dynamics
- Ecology and Vegetation Dynamics Studies
- Polar Research and Ecology
- Nuclear Physics and Applications
Australian Nuclear Science and Technology Organisation
2016-2025
The University of Queensland
2023-2025
Anhui University of Science and Technology
2025
Australian Government
2023
University of Cambridge
2022
University of Arizona
2007-2022
Bridge University
2022
Yancheng Institute of Technology
2022
Institut de l'Information Scientifique et Technique
2020-2022
New York University Press
2022
The Southern Hemisphere SHCal04 radiocarbon calibration curve has been updated with the addition of new data sets extending measurements to 2145 cal BP and including ANSTO Younger Dryas Huon pine set. Outside range measured data, is based upon ern as presented in IntCal13, an interhemispheric offset averaging 43 ± 23 yr modeled by autoregressive process represent short-term correlations offset.
ABSTRACT Early researchers of radiocarbon levels in Southern Hemisphere tree rings identified a variable North-South hemispheric offset, necessitating construction separate calibration curve for the South. We present here SHCal20, revised from 0–55,000 cal BP, based upon SHCal13 and fortified by addition 14 new tree-ring data sets 2140–0, 3520–3453, 3608–3590 13,140–11,375 BP time intervals. detail statistical approaches used recommendations use Northern (IntCal20), (SHCal20) suggest where...
We present a compilation of tropospheric 14 CO 2 for the period 1950–2010, based on published radiocarbon data from selected records atmospheric sampling and tree-ring series. This is new version by Hua Barbetti (2004) consists yearly summer sets zonal, hemispheric, global levels C. In addition, compiled (and extended) monthly 5 zones (3 in Northern Hemisphere Southern Hemisphere) are reported. The annual use regional carbon model calculations, while extended serve as calibration curves C...
Comprehensive published radiocarbon data from selected atmospheric records, tree rings, and recent organic matter were analyzed grouped into 4 different zones (three for the Northern Hemisphere one whole Southern Hemisphere). These 14 C summer season of each hemisphere employed to construct zonal, hemispheric, global sets use in regional carbon model calculations including calibrating comparing cycle models. In addition, extended monthly compiled age calibration purposes. This is first time...
ABSTRACT This paper presents a compilation of atmospheric radiocarbon for the period 1950–2019, derived from CO 2 sampling and tree rings clean-air sites. Following approach taken by Hua et al. (2013), our revised extended consists zonal, hemispheric global ( 14 C) data sets, with monthly sets 5 zones (Northern Hemisphere 1, 2, 3, Southern 3 1–2). Our new includes smooth curves zonal that are more suitable dating applications than previous based on simple averaging. dataset is intended to...
Global warming causes the poleward shift of trailing edges marine ectotherm species distributions. In semi-enclosed Mediterranean Sea, continental masses and oceanographic barriers do not allow natural connectivity with thermophilic pools: as retreat, a net diversity loss occurs. We quantify this on Israeli shelf, among warmest areas in Mediterranean, by comparing current native molluscan richness historical one obtained from surficial death assemblages. recorded only 12% 5% historically...
We present routine methods of target preparation for radiocarbon analysis at the ANTARES Accelerator Mass Spectrometry (AMS) Centre, as well recent developments which have decreased our procedural blank level and improved ability to process small samples containing less than 200 μg carbon. Routine 14 C sample include pretreatment, CO 2 extraction (combustion, hydrolysis water stripping) conversion graphite (graphitization). A new method cleaning glassware reagents used in processing, by...
Argon gas was trapped at high pressure within hollow carbon tubes grown in vapor that have an outer diameter of between 20 and 150 nanometers. The forced into the by hot isostatically pressing (HIPing) material for 48 hours 650°C under argon 170 megapascals. Energy dispersive x-ray spectroscopy maps line scans across show is inside bore not tube walls. room temperature these estimated to be about 60 megapascals, which indicates equilibrium attained HIPing temperature. These findings...
Anthropogenic activity is now recognised as having profoundly and permanently altered the Earth system, suggesting we have entered a human-dominated geological epoch, 'Anthropocene'. To formally define onset of Anthropocene, synchronous global signature within geological-forming materials required. Here report series precisely-dated tree-ring records from Campbell Island (Southern Ocean) that capture peak atmospheric radiocarbon (14C) resulting Northern Hemisphere-dominated thermonuclear...
Abstract The La Niña and El Niño phases of the Niño-Southern Oscillation (ENSO) have major impacts on regional rainfall patterns around globe, with substantial environmental, societal economic implications. Long-term perspectives ENSO behaviour, under changing background conditions, are essential to anticipating how may respond future climate scenarios. Here, we derive a 7700-year, quantitative precipitation record using carbon isotope ratios from single species leaf preserved in lake...
Permafrost and methane hydrates are large, climate-sensitive old carbon reservoirs that have the potential to emit large quantities of methane, a potent greenhouse gas, as Earth continues warm. We present ice core isotopic measurements (Δ14C, δ13C, δD) from last deglaciation, which is partial analog for modern warming. Our results show emissions in response deglacial warming were small (<19 teragrams per year, 95% confidence interval) argue against similar future also indicate biomass...
Introduced taro (Colocasia esculenta) is assumed to have been ubiquitous in pre-contact societies across Oceania. However, there are few reports of direct, botanical evidence for its presence Micronesia during this time. Here we report starch analysis soil/sediment samples from Ebon Atoll the Marshall Islands, eastern Micronesia. Starch grains, xylem cells, and calcium oxalate crystals cf. were found at three sites, habitation layers encompassing period 1875-1715 cal. BP 1060-920 (95% CI)....
Coral reefs track sea level and are particularly sensitive to changes in climate. Reefs threatened by global warming, with many experiencing increased coral bleaching. Warmer surface temperatures might enable reef expansion into mid latitudes. Here we report multibeam sonar coring that reveal an extensive relict around Lord Howe Island, which is fringed the southernmost Pacific Ocean. The reef, water depths of 25–50 m, flourished early Holocene covered area more than 20 times larger modern...
[1] The South China Sea (SCS) is well connected with the western Pacific and influenced by East Asian monsoon. We have examined temporal variations in radiocarbon marine reservoir ages (R) regional corrections (ΔR) of SCS during Holocene using paired measurements AMS 14C TIMS 230Th on 20 pristine corals. results show large fluctuations both R ΔR values over past 7500 years (yrs) two distinct plateaus 7.5–5.6 3.5–2.5 thousand calendar before present (cal ka BP). respective weighted mean these...
Low‐lying reef islands appear particularly threatened by anticipated sea‐level rise, and determining how they formed whether are continuing to accumulate sediment is essential for their sustainable management. Depositional chronology of Warraber Island, a small sand cay in Torres Strait, Australia, re‐examined based on AMS radiocarbon dating specific skeletal components. Whereas radiometric bulk samples indicated one or more discrete phases mid‐late Holocene deposition, component‐specific...
Radiocarbon-calibrated amino acid racemization ages of 428 individually dated shells representing four molluscan taxa are used to quantify time-averaging and shell half-lives with increasing burial depth in the shallow-water carbonate lagoon Rib Reef, central Great Barrier Australia. The top 20 cm sediment contains a distinct, essentially modern assemblage. Shells recovered at depths from 25 125 age-homogeneous significantly older than surface layer. Taxon age distributions within...