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Articles 1 - 9 of 9
Full-Text Articles in Social and Behavioral Sciences
Earth Is (Mostly) Flat: Apportionment Of The Flux Of Continental Sediment Over Millennial Time Scales, Jane K. Willenbring, Alexandru T. Codilean, Brandon Mcelroy
Earth Is (Mostly) Flat: Apportionment Of The Flux Of Continental Sediment Over Millennial Time Scales, Jane K. Willenbring, Alexandru T. Codilean, Brandon Mcelroy
Faculty of Science, Medicine and Health - Papers: part A
We use a new compilation of global denudation estimates from cosmogenic nuclides to calculate the apportionment and the sum of all sediment produced on Earth by extrapolation of a statistically significant correlation between denudation rates and basin slopes to watersheds without denudation rate data. This robust relationship can explain approximately half of the variance in denudation from quartz-bearing topography drained by rivers using only mean slopes as the predictive tool and matches a similar fit for large river basins. At slopes >200 m/km, topography controls denudation rates. Controls on denudation in landscapes where average slopes are 10 mm/k.y. We use …
The Significance Of Carbon-Enriched Dust For Global Carbon Accounting, Nicholas P. Webb, Adrian Chappell, Craig L. Strong, Samuel K. Marx, Granth Mctainsh
The Significance Of Carbon-Enriched Dust For Global Carbon Accounting, Nicholas P. Webb, Adrian Chappell, Craig L. Strong, Samuel K. Marx, Granth Mctainsh
Faculty of Science, Medicine and Health - Papers: part A
Soil carbon stores amount to 54% of the terrestrial carbon pool and twice the atmospheric carbon pool, but soil organic carbon (SOC) can be transient. There is an ongoing debate about whether soils are a net source or sink of carbon, and understanding the role of aeolian processes in SOC erosion, transport and deposition is rudimentary. The impacts of SOC erosion by wind on the global carbon budget, and its importance for carbon accounting remain largely unknown. Current understanding of SOC losses to wind erosion is based on the assumption that the SOC content of eroded material is the same …
Anthropogenic Factors And Nutrient Variability Along The Coral Coast, Fiji, Ulukalesi Tamata, John Morrison
Anthropogenic Factors And Nutrient Variability Along The Coral Coast, Fiji, Ulukalesi Tamata, John Morrison
Faculty of Science, Medicine and Health - Papers: part A
Coral reefs the world over are being threatened by anthropogenic factors, one of the most significant being nutrient enrichment of the coastal waters. The Coral Coast region, in south-western Viti Levu, Fiji, has undergone very rapid development since the 1970s. Observations by local communities and the few sporadic studies conducted in the area have shown progressive degradation of the fringing reefs and deterioration of the water quality. In the present study, while water column nutrient concentrations showed high variability, averages over a long period of monitoring showed clear associations between anthropogenic effects and water quality. Nutrient concentrations were highly variable, …
Assessing Reef Island Response To Environmental Conditions On The Gbr, Sarah Hamylton, Marjetta Puotinen
Assessing Reef Island Response To Environmental Conditions On The Gbr, Sarah Hamylton, Marjetta Puotinen
Faculty of Science, Medicine and Health - Papers: part A
Reef island cays form through the deposition of sediment as a result of wave trains converging across reef platforms and, at the regional scale, are influenced by a range of oceanographic and physical environmental factors. Preliminary results of a spatial modeling exercise applied to 103 reef islands are presented, demonstrating that variation in island area and volume can be accurately expressed as a function of latitudinal and cross-shelf gradients in regional oceanographic factors (exposure to incident waves, tidal range and the frequency of tropical cyclones) and local physical factors (position on the shelf, area of supporting reef platform, area of …
Constraints On Instantaneous Ozone Production Rates And Regimes During Domino Derived Using In-Situ Oh Reactivity Measurements, V Sinha, J Williams, J M. Diesch, F Drewnick, M Martinez, H Harder, E Regelin, Dagmar Kubistin, H Bozem, Z Hosaynali-Beygi, H Fischer, M D. Andres-Hernandez, D Kartal, J A. Adame, J Lelieveld
Constraints On Instantaneous Ozone Production Rates And Regimes During Domino Derived Using In-Situ Oh Reactivity Measurements, V Sinha, J Williams, J M. Diesch, F Drewnick, M Martinez, H Harder, E Regelin, Dagmar Kubistin, H Bozem, Z Hosaynali-Beygi, H Fischer, M D. Andres-Hernandez, D Kartal, J A. Adame, J Lelieveld
Faculty of Science, Medicine and Health - Papers: part A
In this study air masses are characterized in terms of their total OH reactivity which is a robust measure of the "reactive air pollutant loading". The measurements were performed during the DOMINO campaign (Diel Oxidant Mechanisms In relation to Nitrogen Oxides) held from 21/11/2008 to 08/12/2008 at the Atmospheric Sounding Station - El Arenosillo (37.1° N-6.7° W, 40 m a.s.l.). The site was frequently impacted by marine air masses (arriving at the site from the southerly sector) and air masses from the cities of Huelva (located NW of the site), Seville and Madrid (located NNE of the site). OH reactivity …
Reef-Scale Assessment Of Intertidal Large Benthic Foraminifera Populations On One Tree Island, Great Barrier Reef And Their Future Carbonate Production Potential In A Warming Ocean, Steve S. Doo, Sarah Hamylton, Maria Byrne
Reef-Scale Assessment Of Intertidal Large Benthic Foraminifera Populations On One Tree Island, Great Barrier Reef And Their Future Carbonate Production Potential In A Warming Ocean, Steve S. Doo, Sarah Hamylton, Maria Byrne
Faculty of Science, Medicine and Health - Papers: part A
Populations of large benthic foraminiferans (LBFs) that inhabit coral reef platforms are major producers of calcium carbonate (CaCO3) in reef ecosystems. This study documented the population density of living intertidal LBF populations at One Tree Reef (OTR), southern Great Barrier Reef, in a community dominated by Marginopora vertebralis and Baculogypsina sphaerulata. Densities of 7.7 × 103 M. vertebralis individuals (ind.)/m2 and 4.5 × 105 B. sphaerulata ind./m2 were estimated for these populations in May 2011. We applied remote-sensing technology to determine reef-scale estimates of suitable Foraminifera habitats and used these to estimate overall stocks of LBF populations on the intertidal …
Selective Transport Of Cadmium By Pvc/Aliquat 336 Polymer Inclusion Membranes (Pims): The Role Of Membrane Composition And Solution Chemistry, Sandra Adelung, Burkhard Lohrengel, Long Duc Nghiem
Selective Transport Of Cadmium By Pvc/Aliquat 336 Polymer Inclusion Membranes (Pims): The Role Of Membrane Composition And Solution Chemistry, Sandra Adelung, Burkhard Lohrengel, Long Duc Nghiem
Faculty of Science, Medicine and Health - Papers: part A
This study investigated the extraction and stripping performance of PIMs consisting of PVC and Aliquat 336. Extraction and stripping of three representative heavy metals - namely Cd2+, Cu2+, and Zn2+ - by the synthesized membranes were evaluated as a function of sodium chloride concentration and under different stripping solutions (0.01 M HNO3, Milli-Q water, 0.01 M HCl, and 0.01 M NaOH), respectively. Results reported here indicate that the formation of negatively charged metal chloride complex species was responsible for the extraction of the target metal to PIMs. Experimental results and thermodynamic modeling of the speciation of chloro metal complexes further …
Sciamachy Wfm-Doas Xco2: Comparison With Carbontracker Xco2 Focusing On Aerosols And Thin Clouds, J Heymann, O Schneising, Markus Reuter, M Buchwitz, V V. Rozanov, Voltaire A. Velazco, H Bovensmann, J P. Burrows
Sciamachy Wfm-Doas Xco2: Comparison With Carbontracker Xco2 Focusing On Aerosols And Thin Clouds, J Heymann, O Schneising, Markus Reuter, M Buchwitz, V V. Rozanov, Voltaire A. Velazco, H Bovensmann, J P. Burrows
Faculty of Science, Medicine and Health - Papers: part A
Carbon dioxide (CO2) is the most important greenhouse gas whose atmospheric loading has been significantly increased by anthropogenic activity leading to global warming. Accurate measurements and models are needed in order to reliably predict our future climate. This, however, has challenging requirements. Errors in measurements and models need to be identified and minimised. In this context, we present a comparison between satellite-derived column-averaged dry air mole fractions of CO2, denoted XCO2, retrieved from SCIAMACHY/ENVISAT using the WFM-DOAS (weighting function modified differential optical absorption spectroscopy) algorithm, and output from NOAA's global CO2 modelling and assimilation system CarbonTracker. We investigate to what …
Bioregional Assessment Project: Sydney Metropolitan, Southern Rivers And Hawkesbury-Nepean Catchments: Data Collation Phase To Study The Impact Of Mining Activity And Coal Seam Gas On Environmental Assets, John Bradd, Tim Cohen, Sam Marx, Sol Buckman, Emma Burkhardt, A Clarke, Nicole Cook, Stephen Cullen, James Daley, Alexi Gavin, Ren Hu, Emma Kiekebosch-Fitt, Matt Lemcke, Andrew Lowe, Thomas Mcmahon, Luke Mcneilage, Kaitlyn O'Mara, Garth Nagle, Sam Robson, Carolyn Silveri, Joe Stammers
Bioregional Assessment Project: Sydney Metropolitan, Southern Rivers And Hawkesbury-Nepean Catchments: Data Collation Phase To Study The Impact Of Mining Activity And Coal Seam Gas On Environmental Assets, John Bradd, Tim Cohen, Sam Marx, Sol Buckman, Emma Burkhardt, A Clarke, Nicole Cook, Stephen Cullen, James Daley, Alexi Gavin, Ren Hu, Emma Kiekebosch-Fitt, Matt Lemcke, Andrew Lowe, Thomas Mcmahon, Luke Mcneilage, Kaitlyn O'Mara, Garth Nagle, Sam Robson, Carolyn Silveri, Joe Stammers
Faculty of Science, Medicine and Health - Papers: part A
This study was commissioned by the Hawkesbury-Nepean (HNCMA), Sydney Metropolitan (SMCMA) and Southern Rivers (SRCMA) Catchment Management Authorities and undertaken by the University of Wollongong to collate existing data and to provide a preliminary assessment of the potential impacts of coal seam gas (CSG) and coal mining activities on environmental assets within the three CMA regions, where environmental assets were defined under three broad themes; water, land and biodiversity. This study formed part of the Australian Federal Government’s Department of Sustainability, Environment, Water, Population and Communities (SEWPaC) Bioregional Assessment initiative within regions potentially affected by CSG and coal mining activities. …