Recognising terrestrially-derived salt (NaCl) in SE Australian dust

Shiga, Yuki; Greene, Richard; Scott, Kevin M.; Stelcer, Eduard

doi:10.1016/j.aeolia.2011.02.003

Cited by 11 publications

(3 citation statements)

References 18 publications

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“…3) provided further evidence that terrestrial Na from the zone of salt lakes in the north-west is co-transported with terrestrial soil from this region. The input of terrestrial salt from this source region has also been detected at other remote inland areas, for example Wagga Wagga situated 118 km NW of our study site and Cobar (Shiga et al, 2011). In addition, local emissions of metals e.g.…”

Section: Aerosol Sourcessupporting

confidence: 77%

Chemical characterisation and source identification of atmospheric aerosols in the Snowy Mountains, south-eastern Australia

Tadros

Crawford

Treble

et al. 2018

Science of The Total Environment

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Characterisation of atmospheric aerosols is of major importance for: climate, the hydrological cycle, human health and policymaking, biogeochemical and palaeo-climatological studies. In this study, the chemical composition and source apportionment of PM (particulate matter with aerodynamic diameters less than 2.5μm) at Yarrangobilly, in the Snowy Mountains, SE Australia are examined and quantified. A new aerosol monitoring network was deployed in June 2013 and aerosol samples collected during the period July 2013 to July 2017 were analysed for 22 trace elements and black carbon by ion beam analysis techniques. Positive matrix factorisation and back trajectory analysis and trajectory clustering methods were employed for source apportionment and to isolate source areas and air mass travel pathways, respectively. This study identified the mean atmospheric PM mass concentration for the study period was (3.3±2.5)μgm. It is shown that automobile (44.9±0.8)%, secondary sulfate (21.4±0.9)%, smoke (12.3±0.6)%, soil (11.3±0.5)% and aged sea salt (10.1±0.4)% were the five PM source types, each with its own distinctive trends. The automobile and smoke sources were ascribed to a significant local influence from the road network and bushfire and hazard reduction burns, respectively. Long-range transport are the dominant sources for secondary sulfate from coal-fired power stations, windblown soil from the inland saline regions of the Lake Eyre and Murray-Darling Basins, and aged sea salt from the Southern Ocean to the remote alpine study site. The impact of recent climate change was recognised, as elevated smoke and windblown soil events correlated with drought and El Niño periods. Finally, the overall implications including potential aerosol derived proxies for interpreting palaeo-archives are discussed. To our knowledge, this is the first long-term detailed temporal and spatial characterisation of PM aerosols for the region and provides a crucial dataset for a range of multidisciplinary research.

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Section: Aerosol Sourcessupporting

confidence: 77%

Chemical characterisation and source identification of atmospheric aerosols in the Snowy Mountains, south-eastern Australia

Tadros

Crawford

Treble

et al. 2018

Science of The Total Environment

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“…Blackburn and McLeod 1983) and salts associated with aeolian dust (e.g. Shiga et al 2011). Other natural salinization processes include discharge of naturally saline groundwaters and saline groundwater intrusion.…”

Section: Soil Processes and Salt Accumulation In The Root Zonementioning

confidence: 99%

Soil and Aquifer Salinization: Toward an Integrated Approach for Salinity Management of Groundwater

Greene

Timms²,

Rengasamy

et al. 2016

Integrated Groundwater Management

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Degradation of the quality of groundwater due to salinization processes is one of the key issues limiting the global dependence on groundwater in aquifers. As the salinization of shallow aquifers is closely related to root-zone salinization, the two must be considered together. This chapter initially describes the physical and chemical processes causing salinization of the root-zone and shallow aquifers, highlighting the dynamics of these processes and how they can be influenced by irrigation and drainage practices, thus illustrating the connectivity between soil and groundwater salinization. The processes leading to aquifer salinization in both inland and coastal areas are discussed. The roles of extractive resource industries, such as mining and coal bed methane operations, in causing aquifer salinization are also outlined. Hydrogeochemical changes occurring during salinization of aquifers are examined with the aid of Piper and Mixing Diagrams. The chapter then illustrates the extent of the problem of groundwater salinization as influenced by management and policy using two case studies. The first is representative of a developing country and explores management of salt-affected soils in the Indus Valley, Pakistan, while the second looks at a developed country, and illustrates how through monitoring we can deduce

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“…& Aeolian salt deposition. In arid climates there exists the possibility of occasional dust storms with winds capable of transporting particles of salty soil (Shiga et al 2011). …”

Section: Rechna Doab Punjab Pakistanmentioning

confidence: 99%

Impact of irrigated agriculture on groundwater-recharge salinity: a major sustainability concern in semi-arid regions

et al. 2018

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Intensive irrigated agriculture substantially modifies the hydrological cycle and often has major environmental impacts. The article focuses upon a specific concern-the tendency for progressive long-term increases in the salinity of groundwater recharge derived from irrigated permeable soils and replenishment of unconfined aquifers in more arid regions. This process has received only scant attention in the water-resource literature and has not been considered by agricultural science. This work makes an original contribution by analysing, from scientific principles, how the salinisation of groundwater recharge arises and identifies the factors affecting its severity. If not proactively managed, the process eventually will impact irrigation waterwell salinity, the productivity of agriculture itself, and can even lead to land abandonment. The types of management measure required for mitigation are discussed through three detailed case histories of areas with high-value groundwater-irrigated agriculture (in Spain, Argentina and Pakistan), which provide a long-term perspective on the evolution of the problem over various decades.

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Recognising terrestrially-derived salt (NaCl) in SE Australian dust

Cited by 11 publications

References 18 publications

Chemical characterisation and source identification of atmospheric aerosols in the Snowy Mountains, south-eastern Australia

Chemical characterisation and source identification of atmospheric aerosols in the Snowy Mountains, south-eastern Australia

Soil and Aquifer Salinization: Toward an Integrated Approach for Salinity Management of Groundwater

Impact of irrigated agriculture on groundwater-recharge salinity: a major sustainability concern in semi-arid regions

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