Role of eolian dust deposits in landscape development and soil degradation in southeastern Australia

Greene, Richard; Cattle, Stephen R.; McPherson, Andrew

doi:10.1080/08120090902871101

Cited by 17 publications

(6 citation statements)

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“…Cattle et al (2009) point out, however, that modern definitions of clayey loess could certainly include Butler's original definition of parna. Cattle et al (2009) and Greene et al (2009) show that in the classic parna region of Australia, there are significant areas of loessic soils, where an aeolian mantle comprises the upper part of the profile. There is also considerable evidence of exotic quartz in Australian soils (Hesse and McTainsh, 2003).…”

Section: Geography Of Loessmentioning

confidence: 99%

“…8), Australia has little in the way of what most field geologists would identify as true unaltered loess deposits, as discussed earlier. Nevertheless, examples of aeolian mantles (Cattle et al, 2009;Greene et al, 2009) and aeolian ''contamination'' of soils are abundant in Australia, and occur over a widespread area in the southern part of the continent (Fig. 27).…”

Section: Examples Of Dust Mantles In Soils and Aeolian ''Contaminatiomentioning

confidence: 99%

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The geologic records of dust in the Quaternary

2013

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Study of geologic records of dust composition, sources and deposition rates is important for understanding the role of dust in the overall planetary radiation balance, fertilization of organisms in the world's oceans, nutrient additions to the terrestrial biosphere and soils, and for paleoclimatic reconstructions. Both glacial and non-glacial processes produce fine-grained particles that can be transported by the wind. Geologic records of dust flux occur in a number of depositional archives for sediments: (1) loess deposits; (2) lake sediments; (3) soils; (4) deep-ocean basins; and (5) ice sheets and smaller glaciers. These archives have several characteristics that make them highly suitable for understanding the dynamics of dust entrainment, transport, and deposition. First, they are often distributed over wide geographic areas, which permits reconstruction of spatial variation of dust flux. Second, a number of dating methods can be applied to sediment archives, which allows identification of specific periods of greater or lesser dust flux. Third, aeolian sediment particle size and composition can be determined so that dust source areas can be ascertained and dust transport pathways can be reconstructed. Over much of the Earth's surface, dust deposition rates were greater during the last glacial period than during the present interglacial period. A dustier Earth during glacial periods is likely due to increased source areas, greater aridity, less vegetation, lower soil moisture, possibly stronger winds, a decreased intensity of the hydrologic cycle, and greater production of dust-sized particles from expanded ice sheets and glaciers.

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Section: Geography Of Loessmentioning

confidence: 99%

Section: Examples Of Dust Mantles In Soils and Aeolian ''Contaminatiomentioning

confidence: 99%

The geologic records of dust in the Quaternary

2013

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“…In these regions evaporation processes dominate over infiltration, leading to salt accumulation within the soil profile (McDonald et al, 2007). With increasing aridity, aeolian processes and dust deposition becomes an increasingly important contributor to the soil geochemical profile (Greene et al, 2009). Soil trace element geochemistry therefore depends on the interplay between the extent of soil salinisation (controlled by ET), the proximity of potential dust sources, a site climatology that permits dust transport and deposition, the soil organic matter content and character, and the bedrock geochemistry.…”

Section: Introductionmentioning

confidence: 99%

Dripwater organic matter and trace element geochemistry in a semi-arid karst environment: Implications for speleothem paleoclimatology

Rutlidge

Baker

Marjo³

et al. 2014

Geochimica et Cosmochimica Acta

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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“…Mitchell et al (2010) noted an increase in aerosol loading over Australia's arid interior during the decade 1997-2007, presumably a result of the recent prolonged drought. Greene et al (2009) developed a conceptual model that describes the various dust sources and sinks, and the modes of transport of dust materials both into and out of source areas in SE Australia. The model identified key source areas, such as the alluvial and lacustrine environments of the Lake Eyre and Murray-Darling Basins (identified via remote sensing by Bullard et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Optical, physical and chemical characteristics of Australian continental aerosols: results from a field experiment

Radhi

Box

et al. 2010

Atmos. Chem. Phys.

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Abstract. Mineral dust is one of the major components of the world's aerosol mix, having a number of impacts within the Earth system. However, the climate forcing impact of mineral dust is currently poorly constrained, with even its sign uncertain. As Australian deserts are more reddish than those in the Northern Hemisphere, it is important to better understand the physical, chemical and optical properties of this important aerosol. We have investigated the properties of Australian desert dust at a site in SW Queensland, which is strongly influenced by both dust and biomass burning aerosol.Three years of ground-based monitoring of spectral optical thickness has provided a statistical picture of gross aerosol properties. The aerosol optical depth data showed a clear though moderate seasonal cycle with an annual mean of 0.06 ± 0.03. The Angstrom coefficient showed a stronger cycle, indicating the influence of the winter-spring burning season in Australia's north. AERONET size distributions showed a generally bimodal character, with the coarse mode assumed to be mineral dust, and the fine mode a mixture of fine dust, biomass burning and marine biogenic material.In November 2006 we undertook a field campaign which collected 4 sets of size-resolved aerosol samples for laboratory analysis -ion beam analysis and ion chromatography. Ion beam analysis was used to determine the elemental composition of all filter samples, although elemental ratios were considered the most reliable output. Scatter plots showed that Fe, Al and Ti were well correlated with Si, and Co reasonably well correlated with Si, with the Fe/Al ratio somewhat higher than values reported from Northern Hemisphere sites (as expected). Scatter plots for Ca, Mn and K against Si showed Correspondence to: M. A. Box (m.box@unsw.edu.au) clear evidence of a second population, which in some cases could be identified with a particular sample day or size fraction. These data may be used to attempt to build a signature of soil in this region of the Australian interior.Ion chromatography was used to quantify water soluble ions for 2 of our sample sets, complementing the picture provided by ion beam analysis. The strong similarities between the MSA and SO 2− 4 size distributions argue strongly for a marine origin of much of the SO 2− 4 . The similarity of the Na + , Cl − and Mg 2+ size distributions also argue for a marine contribution. Further, we believe that both NO are the result of surface reactions with appropriate gases.

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Role of eolian dust deposits in landscape development and soil degradation in southeastern Australia

Cited by 17 publications

References 71 publications

The geologic records of dust in the Quaternary

The geologic records of dust in the Quaternary

Dripwater organic matter and trace element geochemistry in a semi-arid karst environment: Implications for speleothem paleoclimatology

Optical, physical and chemical characteristics of Australian continental aerosols: results from a field experiment

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