A5017558672- Aeolian processes and effects
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Soil erosion and sediment transport
- Geology and Paleoclimatology Research
- Air Quality and Health Impacts
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Geological formations and processes
- Hydrology and Sediment Transport Processes
- Biocrusts and Microbial Ecology
- Soil Geostatistics and Mapping
- Air Quality Monitoring and Forecasting
- Particle Dynamics in Fluid Flows
- Fire effects on ecosystems
- Marine Biology and Ecology Research
- Radioactivity and Radon Measurements
- Vehicle emissions and performance
- Aerosol Filtration and Electrostatic Precipitation
- Climate Change and Health Impacts
- Rangeland and Wildlife Management
- Geological and Geophysical Studies
- Impact of Light on Environment and Health
- Soil Carbon and Nitrogen Dynamics
- Geochemistry and Geologic Mapping
Griffith University
2010-2019
Centre for Remote Health
2008-2009
Loughborough University
2003
Macquarie University
1980
Over the past 10 to 15 years there has been a rising interest in interactions between aeolian and fluvial processes from geomorphologists sedimentologists. This reflects recognition of limitations reductionist perspective examining single process systems understanding landform landscape development. paper focuses on rise aeolian-fluvial interaction research dryland environments. We first explore background contemporary situation then review existing at global/regional local scales. From this...
We present a simple theoretical land-surface classification that can be used to determine the location and temporal behaviour of preferential sources terrestrial dust emissions.The also provides information about likely nature sediments, their erodibility likelihood they will generate emissions under given conditions.The scheme is based on dual notions geomorphic type connectivity between units.We demonstrate map potential modern-day in Chihuahuan Desert, Lake Eyre Basin Taklamakan.Through...
The spatial and temporal variability of dust emissions from different surfaces in the Lake Eyre Basin, Australia is determined using MODIS data. For 2003–6 sources 529 plumes were classified: overall 37% originated areas aeolian deposits, 30% alluvial deposits floodplains 29% ephemeral lakes or playas. At this sub‐basin scale, relative importance source geomorphologies varied primarily response to sediment supply availability was not related transport capacity, suggesting Basin a...
During late 2002 and early 2003, southern Australia was in the grip of drought experienced one its most active dust storm seasons last 40 years with large plumes frequently advected over adjacent Southern Ocean. We use meteorological records activity, satellite ocean color, aerosol optical depth data transport modeling to investigate deposition mineral from regions correlate it biological response phytoplankton standing stock as measured by chlorophyll a concentration 5 degree latitude bands...
Field experiments using a sand particle counter and an optical clarified the links between saltation dust emission under wet weakly crusted conditions in fallow field previously cultivated with wheat Australia. A crust was formed by impact of raindroplets after small precipitation events. little soil moisture enhanced strengths aggregation even though dried. Dust concentration proportional to friction wind velocity, but proportionality dependent on ground surface conditions, such as...
Around 30% of oceanic waters are high nitrate low chlorophyll (HNLC) where iron levels limit algal growth. HNLC have mainly been studied using shipboard and lab experiments. Since 1997, remote‐sensing phytoplankton via SeaWiFS Ocean Color has permitted monitoring the constancy this “HNLC condition,” i.e., spatial homogeneity temporal variability over annual cycles. These trends can be exploited, as episodic inputs should conspicuous by subsequent expression iron‐elevated stocks. Subantarctic...
Abstract Using meteorological records (1957–1984) in Australia, formal definitions are proposed of four types dust event: storms, blowing dust, whirls, and haze. Australia‐wide maps the extent these event presented.
Dust is an important vector for iron supply to the ocean, which subsequently impacts ocean productivity, atmospheric CO 2 concentrations, and hence global climate. Here, we synthesize processes influencing biogeochemistry of Australian dust compare them with those from other Southern Hemisphere sources. Our observations range soil physical properties abrasion cloud chamber chemistry experiments storms their dispersion deposition. We then present satellite impact episodic deposition events on...
Abstract Soil carbon stores amount to 54% of the terrestrial pool and twice atmospheric pool, but soil organic ( SOC ) can be transient. There is an ongoing debate about whether soils are a net source or sink carbon, understanding role aeolian processes in erosion, transport deposition rudimentary. The impacts erosion by wind on global budget, its importance for accounting remain largely unknown. Current losses based assumption that content eroded material same as parent soils. However,...
Dust transported by Southern Hemisphere mid-latitude westerly winds from Australia and deposited in the Tasman Sea shows no evidence for stronger during last glacial maximum (LGM), compared to Holocene. Features of particle-size distributions dust do, however, indicate enhanced dry deposition LGM changing rainfall scavenging deglaciation early Holocene as climate ameliorated. From these results it appears that activation desert dunefields over 40% was result a reduction stabilizing...