A5079699237- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Isotope Analysis in Ecology
- Climate variability and models
- Cryospheric studies and observations
- Mass Spectrometry Techniques and Applications
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Geology and Paleoclimatology Research
- Catalytic Processes in Materials Science
- Geochemistry and Geologic Mapping
- Radioactive contamination and transfer
- Spectroscopy and Laser Applications
- Advanced Chemical Physics Studies
- Building Energy and Comfort Optimization
- Ammonia Synthesis and Nitrogen Reduction
- Synthesis and characterization of novel inorganic/organometallic compounds
- CO2 Sequestration and Geologic Interactions
- Astro and Planetary Science
- Chemical Reaction Mechanisms
- Catalysis and Oxidation Reactions
- Carbon Dioxide Capture Technologies
- Radical Photochemical Reactions
- Geological and Geophysical Studies
Commonwealth Scientific and Industrial Research Organisation
1999-2023
CSIRO Oceans and Atmosphere
2013-2023
CO2CRC
2011
The University of Adelaide
1988-2007
UNSW Sydney
1986-1992
University of Waterloo
1990-1992
We present measurements of the stable carbon isotope ratio in air extracted from Antarctic ice core and firn samples. The same samples were previously used by Etheridge co-workers to construct a high precision 1000-year record atmospheric CO<sub>2</sub> concentration, featuring close link between modern records high-time resolution. Here, we start confirming trend Cape Grim situ δ<sup>13</sup>C 1982 1996, extend it back 1978 using Air Archive. agrees with record, but only after correction...
We present new measurements of δ 13 C CO 2 extracted from a high‐resolution ice core Law Dome (East Antarctica), together with firn performed at and South Pole, covering the last 150 years. Our analysis is motivated by need to better understand role feedback carbon (C) cycle in climate change, advances measurement methods, apparent anomalies when comparing air records Pole. demonstrate improved consistency between ice, Pole firn, Cape Grim (Tasmania) atmospheric data, providing evidence that...
Abstract. The isotopic composition of carbon (Δ14C and δ13C) in atmospheric CO2 oceanic terrestrial reservoirs is influenced by anthropogenic emissions natural exchanges, which can respond to drive changes climate. Simulations 14C 13C the ocean components Earth system models (ESMs) present opportunities for model evaluation investigation cycling, including uptake. use isotopes novel ESMs' component biosphere new analyses historical may improve predictions future cycle climate system. We...
High‐precision, multispecies measurements of flask air samples since 1992 from CSIRO's global sampling network reveal strong correlation among interannual growth rate variations CO 2 and its δ 13 C, H , CH 4 CO. We show that a major fraction the variability is consistent with two emission pulses coinciding large biomass burning events in 1994/1995 1997/1998 tropical boreal regions, observations unusually high levels combustion products overlying troposphere at these times. Implied pulse...
We present estimates of the surface sources and sinks CO 2 for 1992–2005 deduced from atmospheric inversions. use records 67 sites 10 δ 13 records. two models to increase robustness results. The results suggest that interannual variability is dominated by tropical land. Statistically significant in Pacific supports recent ocean modeling studies region. northern land also shows variability. In particular, there a large positive anomaly 2003 north Asia, which we associate with anomalous...
Abstract. Ice core records of the major atmospheric greenhouse gases (CO2, CH4, N2O) and their isotopologues covering recent centuries provide evidence biogeochemical variations during Late Holocene pre-industrial periods over transition to industrial period. These come from a number ice firn air sites have been measured in several laboratories around world show common features but also unresolved differences. Here we present revised records, including new measurements, performed at CSIRO...
Since 1992, the National Oceanic and Atmospheric Administration (NOAA), Climate Monitoring Diagnostics Laboratory of United States Commonwealth Scientific Industrial Research Organization (CSIRO), Division Australia have routinely analyzed same air sample collected biweekly at Cape Grim, Tasmania. Comparisons measurements atmospheric CO 2 , CH 4 CO, H stable isotopes (δ 13 C, δ 18 O) are used to assess consistency observations independently made by two laboratories. Results demonstrate that...
Abstract Stable hydrogen, carbon, nitrogen, oxygen and sulfur (HCNOS) isotope compositions expressed as isotope-delta values are typically reported relative to international standards such Vienna Standard Mean Ocean Water (VSMOW), Peedee belemnite (VPDB) or Cañon Diablo Troilite (VCDT). These chosen by convention the calibration methods used realise them in practice undergo occasional changes. To ensure longevity reusability of published data, a comprehensive description (1) analytical...
Stable isotopes of carbon dioxide distinguish between oceanic and terrestrial uptake accumulating atmospheric dioxide. At Cape Grim (41°S, 141°E), two Commonwealth Scientific Industrial Research Organisation programs provide δ 13 C 18 O CO 2 employing different collection, sample pretreatment, calibration strategies that exemplify problems. A comprehensive reexamination methods results in agreement 0.005 ± 0.004‰ through 14 overlapping years data suggests we have described accounted for the...
We present the global research landscape which aims to deliver a measurement infrastructure underpin atmospheric observations of key greenhouse gases governing changes in Earth's climate. These measurements significant challenge metrological community, analytical laboratories and major producers reference materials. The review focuses on progress made Gas Analysis Working Group Consultative Committee for Amount Substance: Metrology Chemistry Biology (CCQM-GAWG) establishing primary...
Marine (baseline) air from Cape Grim (41°S), collected and archived in high‐pressure metal containers, provides a history of δ 13 C atmospheric methane 1978. A similar is obtained pumped different layers the firn at Law Dome, Antarctica, after correction for diffusion gravitational settling effects firn. The archive records are linked to measurements since 1992 using 5‐L glass flasks filled Grim, compared data 1989 comparable site Baring Head, New Zealand. Over 18 years extratropical...
We have modeled the distribution of δ 18 O in atmospheric CO 2 with a new comprehensive global three‐dimensional model. focused this study on seasonal cycle and meridional gradient atmosphere. The model has been compared data set O‐CO , which merges measurements made by different laboratories, allowance for recently elucidated calibration biases. compares well but advances measured two months. calculated amplitude is typically 2/3 value, sensitivity to uncertainties input parameter such that...
Environmental context Carbon tetrachloride in the background atmosphere is a significant environmental concern, responsible for ~10% of observed stratospheric ozone depletion. Atmospheric concentrations CCl4 are higher than expected from currently identified emission sources: largely residual emissions production, transport and use. Additional sources required to balance atmospheric destruction may contribute slower-than-expected recovery Antarctic ‘hole’. Abstract Global (1978–2012)...
Abstract. Since 1999, Environment and Climate Change Canada (ECCC) has been coordinating a multi-laboratory comparison of measurements long-lived greenhouse gases in whole air samples collected at the Global Atmosphere Watch (GAW) Alert Observatory located Canadian High Arctic (82∘28′ N, 62∘30′ W). In this paper, we evaluate measurement agreement atmospheric CO2, CH4, N2O, SF6, stable isotopes CO2 (δ13C, δ18O) between leading laboratories from seven independent international institutions....
Monitoring is essential for the approval and control of geological storage carbon dioxide to judge effectiveness technology in mitigating CO2 emissions climate change. We present a strategy monitoring atmosphere vicinity project that designed detect quantify potential emissions. The includes measurements CO2, fluxes tracers, combined with model simulations atmospheric dispersion ecosystem fluxes. applied an program CO2CRC Otway Project where large amounts have been stored deep depleted...
Abstract Intramolecular 13 C and 2 H isotope effects have been measured for unimolecular losses of ethene (the McLafferty rearrangement) from metastable molecular ions 2‐ethyl‐1‐phenylbutanl‐1‐one, 3‐ethylpentan‐2‐one heptan‐4‐one. Primary secondary deuterium are observed at the γ‐(terminal) β‐positions, respectively. Large primary occur β‐positions y positions γ‐ethylpentan‐2‐one The carbon in cases doubly isotopically labelled CH 3 COCH(C 5 )( ) CD COCD(C D 1.17 (±0.01) 1.04 (±0.01), All...