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Articles 1 - 6 of 6
Full-Text Articles in Social and Behavioral Sciences
Cosmogenic 21ne Analysis Of Individual Detrital Grains: Opportunities And Limitations, Alexandru T. Codilean, Paul Bishop, Trevor B. Hoey, Finlay M. Stuart, Derek Fabel
Cosmogenic 21ne Analysis Of Individual Detrital Grains: Opportunities And Limitations, Alexandru T. Codilean, Paul Bishop, Trevor B. Hoey, Finlay M. Stuart, Derek Fabel
Faculty of Science, Medicine and Health - Papers: part A
We use a numerical model describing cosmogenic nuclide acquisition in sediment moving through the upper Gaub River catchment to evaluate the extent to which aspects of source area geomorphology and geomorphological processes can be inferred from frequency distributions of cosmogenic 21Ne (21Nec) concentrations in individual detrital grains. The numerical model predicts the pathways of sediment grains from their source to the outlet of the catchment and calculates the total 21Nec concentration that each grain acquires along its pathway. The model fully accounts for variations in nuclide production due to changes in latitude, altitude and topographic shielding and allows for spatially …
Investigating The Glacial History Of The Northern Sector Of The Cordilleran Ice Sheet With Cosmogenic 10be Concentrations In Quartz, Arjen P. Stroeven, Derek Fabel, Alexandru T. Codilean, Johan Kleman, John J. Clague, Maria Miguens-Rodriguez, Sheng Xu
Investigating The Glacial History Of The Northern Sector Of The Cordilleran Ice Sheet With Cosmogenic 10be Concentrations In Quartz, Arjen P. Stroeven, Derek Fabel, Alexandru T. Codilean, Johan Kleman, John J. Clague, Maria Miguens-Rodriguez, Sheng Xu
Faculty of Science, Medicine and Health - Papers: part A
Exposure durations of glacial landforms in widely separated areas of central Yukon Territory affected by the northern sector of the Cordilleran Ice Sheet (CIS) and alpine glaciers have been determined using cosmogenic 10Be in quartz. The aim of our research is to test previous reconstructions of glacial history and to begin to address the paucity of chronological control for the lateral and vertical extent of the northern CIS. Chronological evidence for CIS expansion predating the Last Glacial Maximum comes from minimum surface exposure durations of c 100 ka for two bedrock samples within the Reid glacial limit, indicating a possible …
A New Late Devonian Brachiopod Fauna From New South Wales, Anthony J. Wright, Jiaxin Yan
A New Late Devonian Brachiopod Fauna From New South Wales, Anthony J. Wright, Jiaxin Yan
Faculty of Science, Medicine and Health - Papers: part A
No abstract provided.
Hydroxyl Radicals In The Tropical Troposphere Over The Suriname Rainforest: Airborne Measurements, M Martinez, H Harder, Dagmar Kubistin, M Rudolf, G Eerdekens, H Fischer, T Klupfel, C Gurk, R Konigstedt, U Parchatka, C L. Schiller, A Stickler, J Williams, J Lelieveld
Hydroxyl Radicals In The Tropical Troposphere Over The Suriname Rainforest: Airborne Measurements, M Martinez, H Harder, Dagmar Kubistin, M Rudolf, G Eerdekens, H Fischer, T Klupfel, C Gurk, R Konigstedt, U Parchatka, C L. Schiller, A Stickler, J Williams, J Lelieveld
Faculty of Science, Medicine and Health - Papers: part A
Direct measurements of OH and HO2 over a tropical rainforest were made for the first time during the GABRIEL campaign in October 2005, deploying the custom-built HORUS instrument (HydrOxyl Radical measurement Unit based on fluorescence Spectroscopy), adapted to fly in a Learjet wingpod. Biogenic hydrocarbon emissions were expected to strongly reduce the OH and HO2 mixing ratios as the air is transported from the ocean over the forest. However, surprisingly high mixing ratios of both OH and HO2 were encountered in the boundary layer over the rainforest. The HORUS instrumentation and calibration methods are described in detail and the measurement …
Hydroxyl Radicals In The Tropical Troposphere Over The Suriname Rainforest: Comparison Of Measurements With The Box Model Mecca, Dagmar Kubistin, H Harder, M Martinez, M Rudolf, R Sander, H Bozem, G Eerdekens, H Fischer, C Gurk, T Klupfel, R Konigstedt, U Parchatka, C L. Schiller, A Stickler, D Taraborrelli, J Williams, J Lelieveld
Hydroxyl Radicals In The Tropical Troposphere Over The Suriname Rainforest: Comparison Of Measurements With The Box Model Mecca, Dagmar Kubistin, H Harder, M Martinez, M Rudolf, R Sander, H Bozem, G Eerdekens, H Fischer, C Gurk, T Klupfel, R Konigstedt, U Parchatka, C L. Schiller, A Stickler, D Taraborrelli, J Williams, J Lelieveld
Faculty of Science, Medicine and Health - Papers: part A
As a major source region of the hydroxyl radical OH, the Tropics largely control the oxidation capacity of the atmosphere on a global scale. However, emissions of hydrocarbons from the tropical rainforest that react rapidly with OH can potentially deplete the amount of OH and thereby reduce the oxidation capacity. The airborne GABRIEL field campaign in equatorial South America (Suriname) in October 2005 investigated the influence of the tropical rainforest on the HOx budget (HOx = OH + HO2). The first observations of OH and HO2 over a tropical rainforest are compared to steady state concentrations calculated with the atmospheric …
Morpho Tectonic Units Of The Zagros Orogenic Belt, Ne Iraq: A Modern Analogue For Subduction Accretion Processes, Sarmad A. Ali, Brian Jones, Solomon Buckman, Sabah Ismail, Khalid Aswad
Morpho Tectonic Units Of The Zagros Orogenic Belt, Ne Iraq: A Modern Analogue For Subduction Accretion Processes, Sarmad A. Ali, Brian Jones, Solomon Buckman, Sabah Ismail, Khalid Aswad
Faculty of Science, Medicine and Health - Papers: part A
The Zagros Mountain Belt extends over more than 1800 km through Iraq and southern Iran in front of the Zagros Mountain chain. It forms the boundary between the Iranian Plateau and the Mesopotamian and Gulf basins (Fig. 1). It can be subdivided geomorphologically into: the High Zagros Belt and the Zagros Simply Folded Belt separated by the High Zagros Fault (Berberian and King, 1981; Falcon, 1974; Stockline, 1968). From a tectonic point of view, however, five zones along the length of the Zagros Orogenic Belt can be distinguished (e.g. Stocklin, 1974, 1986; Falcon, 1974; Sten, 1985; Berberian, 1995): the Zagros …