A5079720275- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Polar Research and Ecology
- Climate variability and models
- Arctic and Antarctic ice dynamics
- Isotope Analysis in Ecology
- Ocean Acidification Effects and Responses
- Tree-ring climate responses
- Marine Biology and Ecology Research
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Winter Sports Injuries and Performance
- Atmospheric chemistry and aerosols
- Climate change and permafrost
- Marine Bivalve and Aquaculture Studies
- Marine and coastal ecosystems
- Hydrology and Watershed Management Studies
- Atmospheric aerosols and clouds
- Smart Materials for Construction
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Landslides and related hazards
- Archaeology and ancient environmental studies
- Toxic Organic Pollutants Impact
- Oceanographic and Atmospheric Processes
University of Tasmania
2016-2025
Australian Antarctic Division
2016-2025
Antarctic Climate and Ecosystems Cooperative Research Centre
2014-2023
Department of Climate Change, Energy, the Environment and Water
2022
University of Bremen
2014
Abstract. Volcanic eruptions are an important cause of natural climate variability. In order to improve the accuracy models, precise dating and magnitude climatic effects past volcanism necessary. Here we present a 2000-yr record Southern Hemisphere recorded in ice cores from high accumulation Law Dome site, East Antarctica. The were analysed for suite chemistry signals independently dated via annual layer counting, with 11 ambiguous years at 23 BCE, which has presently lowest error all...
Abstract. Precise information on the relative timing of north-south climate variations is a key to resolving questions concerning mechanisms that force and couple changes between hemispheres. We present new composite record made from five well-resolved Antarctic ice core records robustly represents regional change during last deglaciation. Using fast in global methane gas concentrations as time markers, directly compared Greenland records, allowing detailed mapping inter-hemispheric sequence...
Abstract ENSO causes climate extremes across and beyond the Pacific basin; however, evidence of at high southern latitudes is generally restricted to South West Antarctica. Here, authors report a statistically significant link between sea salt deposition during summer from Law Dome (LD) ice core in East ENSO-related atmospheric anomalies central-western equatorial (CWEP) propagate circumpolar latitudes. These modulate high-latitude zonal winds, with El Niño (La Niña) conditions causing...
The future response of the Antarctic ice sheet to rising temperatures remains highly uncertain. A useful period for assessing sensitivity Antarctica warming is Last Interglacial (LIG) (129 116 ky), which experienced warmer polar and higher global mean sea level (GMSL) (+6 9 m) relative present day. LIG cannot be fully explained by Greenland Ice Sheet melt (∼2 m), ocean thermal expansion, melting mountain glaciers (∼1 suggesting substantial mass loss was initiated Southern Ocean waters,...
Abstract Understanding climate proxy records that preserve physical characteristics of past is a prerequisite to reconstruct long‐term climatic conditions. Water stable isotope ratios (δ 18 O) constitute widely used in ice cores temperature and climate. However, the original signal altered between formation precipitation ice, especially low‐accumulation areas such as East Antarctic Plateau. Atmospheric conditions under which isotopic acquired at Aurora Basin North (ABN), Antarctica, are...
Abstract The Interdecadal Pacific Oscillation, an index which defines decadal climate variability throughout the Pacific, is generally assumed to have positive and negative phases that each last 20-30 years. Here we present a 2000-year reconstruction of obtained using information preserved in Antarctic ice cores, shows are short (7 ± 5 years) infrequent (occurring 10% time) departures from predominantly neutral-positive state lasts decades (61 56 years). These findings suggest Basin risk...
Paleoceanographic archives derived from 17 marine sediment cores reconstruct the response of Southwest Pacific Ocean to peak interglacial, Marine Isotope Stage (MIS) 5e (ca. 125 ka). Paleo‐Sea Surface Temperature (SST) estimates were obtained Random Forest model—an ensemble decision tree tool—applied core‐top planktonic foraminiferal faunas calibrated modern SSTs. The reconstructed geographic pattern SST anomaly (maximum between 120 and 132 ka minus mean SST) seems indicate how MIS...
Abstract. Accurate high-resolution records of snow accumulation rates in Antarctica are crucial for estimating ice sheet mass balance and subsequent sea level change. Snowfall at Law Dome, East Antarctica, have been linked with regional atmospheric circulation to the mid-latitudes as well Antarctic snowfall. Here, we extend length Dome record from 750 years 2035 years, using recent annual layer dating that extends 22 BCE. Accumulation were calculated ratio measured modelled thicknesses,...
Abstract. Paleoclimate research indicates that the Australian instrumental climate record (∼ 100 years) does not cover full range of hydroclimatic variability is possible. To better understand implications this on catchment-scale water resources management, a 1013-year (1000–2012 common era (CE)) annual rainfall reconstruction was produced for Williams River catchment in coastal eastern Australia. No high-resolution paleoclimate proxies are located region and so teleconnection between summer...
Abstract Reconstructing the dynamic response of Antarctic ice sheets to warming during Last Glacial Termination (LGT; 18,000–11,650 yrs ago) allows us disentangle ice-climate feedbacks that are key improving future projections. Whilst sequence events this period is reasonably well-known, relatively poor chronological control has precluded precise alignment ice, atmospheric and marine records, making it difficult assess relationships between ice-sheet (AIS) dynamics, climate change sea level....
Abstract. The Antarctic temperature changes over the past millennia remain more uncertain than in many other continental regions. This has several origins: (1) number of high-resolution ice cores is small, particular on East plateau and some coastal areas Antarctica; (2) short spatially sparse instrumental records limit calibration period for reconstructions assessment methodologies; (3) link between isotope from local climate usually complex dependent spatial scales timescales investigated....
Understanding past climate is essential to our knowledge of how current system operates, and it might respond future change. Techniques reconstruct history are challenging, both accuracy certainty hampered by the quality datasets used. Here we develop a new reconstruction tool apply four ice core proxy based multi-millennial Holocene reconstructions, chosen because their potential influence on East Antarctic climate. The multi-proxy method called Segmented Linear Integral Correlation Kernel...
Abstract. The atmospheric chemistry of iodine and bromine in Polar regions is interest due to the key role halogens many processes, particularly tropospheric ozone destruction. Bromine emitted from open ocean but enriched above first-year sea ice during springtime explosion events, whereas emission attributed biological communities hosted by ice. It has been previously demonstrated that are present Antarctic over glacial–interglacial cycles. Here we investigate seasonal variability polar...
Abstract. Ice cores provide some of the best-dated and most comprehensive proxy records, as they yield a vast growing array indicators. Selecting site for ice core drilling is nonetheless challenging, assessment potential new sites needs to consider variety factors. Here, we demonstrate systematic approach selection East Antarctic high-resolution record. Specifically, seven criteria are considered: (1) 2000-year-old at 300 m depth; (2) above 1000 elevation; (3) minimum accumulation rate 250...
Abstract. Paleoclimate archives, such as high-resolution ice core records, provide a means to investigate past climate variability. Until recently, the Law Dome (Dome Summit South site) record remained one of few millennial-length coastal records in East Antarctica. A new drilled 2017/2018 at Mount Brown South, approximately 1000 km west Dome, provides an additional that will likely span last millennium Indian Ocean sector Here, we compare snow accumulation rates and sea salt concentrations...