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Social and Behavioral Sciences Commons

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University of Wollongong

2001

GeoQuest

Articles 1 - 5 of 5

Full-Text Articles in Social and Behavioral Sciences

Silurian Biostratigraphy Of The Cadia Area, South Of Orange, New South Wales, R B. Rickards, Ian G. Percival, A J. Simpson, Anthony J. Wright Jan 2001

Silurian Biostratigraphy Of The Cadia Area, South Of Orange, New South Wales, R B. Rickards, Ian G. Percival, A J. Simpson, Anthony J. Wright

Faculty of Science, Medicine and Health - Papers: part A

New Silurian fossil discoveries in the vicinity of Cadi a Mine indicate ages younger than shown on recent maps. Limestone, intersected in drill core immediately above an unconformable contact with Late Ordovician volcanics of the mine sequence, yielded an early Wenlock conodont fauna including Prerospathodus amorphognathoides. P procerus and P. rhodesi, together with Kockelella ramdiformis. A diverse shelly fauna of late Wenlock to early Ludlow aspect, dominated by brachio pods, is present in a slumped mudstone on the mine access road. South of the mine, in Rodds Creek valley, Silurian rocks are shown to occur as infaulted slices along the ...


Springtime Enhancement Of Upper Tropospheric Aerosol At 45s, J Ben Liley, James M. Rosen, Norman T. Kjome, Nicholas Jones, Curtis P. Rinsland Jan 2001

Springtime Enhancement Of Upper Tropospheric Aerosol At 45s, J Ben Liley, James M. Rosen, Norman T. Kjome, Nicholas Jones, Curtis P. Rinsland

Faculty of Science, Medicine and Health - Papers: part A

Monthly sonde data for Lauder in Central Otago, New Zealand show profiles of aerosol backscatter from the surface to over 30 km altitude. The tropospheric data vary by season, with greater aerosol backscatter throughout the free troposphere in springtime. Aerosol mixing ratios in layers in the upper troposphere at these times are often much higher than anywhere else above the boundary layer, suggesting that they arise from horizontal transport. Ozone measurements from the sonde show correspondence in vertical structure to the backscatter data and also seasonal enhancement. The latter correlates with aerosol, but competing causes of ozone enhancement make the ...


Mesospheric Temperatures From Observations Of The Hydroxyl (6-2) Emission Above Davis, Antarctica: A Comparison Of Rotational And Doppler Measurements, J L. Innis, Frances Phillips, G B. Burns, P A. Greet, W J R French, P L. Dyson Jan 2001

Mesospheric Temperatures From Observations Of The Hydroxyl (6-2) Emission Above Davis, Antarctica: A Comparison Of Rotational And Doppler Measurements, J L. Innis, Frances Phillips, G B. Burns, P A. Greet, W J R French, P L. Dyson

Faculty of Science, Medicine and Health - Papers: part A

We present observations of the hydroxyl (6–2) airglow lines from ~ 87 km altitude obtained at Davis station, Antarctica, in the austral winter of 1999. Nine nights of observations were made of the P-branch near λ840 nm with a Czerny-Turner scanning spectrometer (CTS); at the same time, high-resolution Fabry-Perot Spectrometer (FPS) spectra were collected of the Q1(1) doublet at λ834 nm. Rotational temperatures were determined from the CTS observations, while Doppler temperatures were derived from the line-widths of the FPS Q1(1) spectra. Absolute temperatures determined by these methods are uncertain by ~ 2 and ~ 20 K, respectively ...


Correlation Of Aerosol And Carbon Monoxide At 45 S: Evidence Of Biomass Burning Emissions, Nicholas Jones, Curtis P. Rinsland, J Ben Liley, Jim Rosen Jan 2001

Correlation Of Aerosol And Carbon Monoxide At 45 S: Evidence Of Biomass Burning Emissions, Nicholas Jones, Curtis P. Rinsland, J Ben Liley, Jim Rosen

Faculty of Science, Medicine and Health - Papers: part A

Altitude profiles of Carbon Monoxide (CO) and aerosols have been compared from the Network for Stratospheric Change (NDSC) mid-latitude southern hemisphere site at Lauder, New Zealand. The CO mixing ratio profile was derived from infrared spectra recorded with a very high resolution Fourier Transform interferometer using three lines of the (1–0) band between 2057 and 2160 cm−1. The aerosol surface area was derived from balloon-borne backscatter radiation at 940 nm. Both datasets show significant enhancements occurring over the observation site in the austral spring. When displayed together their combined effect illustrates the close correlation between CO and aerosols ...


Putting The Wood Back Into Our Rivers: An Experiment In River Rehabilitation, Andrew P. Brooks, Tim B. Abbe, John Jansen, Matt Taylor, Christopher J. Gippel Jan 2001

Putting The Wood Back Into Our Rivers: An Experiment In River Rehabilitation, Andrew P. Brooks, Tim B. Abbe, John Jansen, Matt Taylor, Christopher J. Gippel

Faculty of Science, Medicine and Health - Papers: part A

This paper presents an overview of a project established to assess the effectiveness of woody debris (WD) reintroduction as a river rehabilitation tool. An outline of an experiment is presented that aims to develop and assess the effectiveness of engineered log jams (ELJs) under Australian conditions, and to demonstrate the potential for using a range of ELJs to stabilise a previously de-snagged, high energy gravel-bed channel. Furthermore, the experiment will test the effectiveness of a reach based rehabilitation strategy to increase geomorphic variability and hence habitat diversity. While primarily focusing on the geomorphic and engineering aspects of the rehabilitation strategy ...