Particle size partitioning of metals in humus horizons of two small erosional landforms in the middle Protva basin – a comparative study

Samonova, Olga; Aseyeva, Elena

doi:10.24057/2071-9388-2019-116

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…About 50 % of the soils in the interfluve area were subjected to arable farming. A new and unpublished independent dataset on 33 elements in topsoil horizons was obtained with a higher-accuracy ICP-MS/AES analysis (compared to the DC-ARC-AES dataset of Samonova and Aseyeva, 2020).…”

Section: Comparison Of Various Regionsmentioning

confidence: 99%

Newly identified climatically and environmentally significant high-latitude dust sources

Meinander

Dagsson-Waldhauserová

Amosov

et al. 2022

Atmos. Chem. Phys.

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Abstract. Dust particles from high latitudes have a potentially large local, regional, and global significance to climate and the environment as short-lived climate forcers, air pollutants, and nutrient sources. Identifying the locations of local dust sources and their emission, transport, and deposition processes is important for understanding the multiple impacts of high-latitude dust (HLD) on the Earth's systems. Here, we identify, describe, and quantify the source intensity (SI) values, which show the potential of soil surfaces for dust emission scaled to values 0 to 1 concerning globally best productive sources, using the Global Sand and Dust Storms Source Base Map (G-SDS-SBM). This includes 64 HLD sources in our collection for the northern (Alaska, Canada, Denmark, Greenland, Iceland, Svalbard, Sweden, and Russia) and southern (Antarctica and Patagonia) high latitudes. Activity from most of these HLD sources shows seasonal character. It is estimated that high-latitude land areas with higher (SI ≥0.5), very high (SI ≥0.7), and the highest potential (SI ≥0.9) for dust emission cover >1 670 000 km2, >560 000 km2, and >240 000 km2, respectively. In the Arctic HLD region (≥60∘ N), land area with SI ≥0.5 is 5.5 % (1 035 059 km2), area with SI ≥0.7 is 2.3 % (440 804 km2), and area with SI ≥0.9 is 1.1 % (208 701 km2). Minimum SI values in the northern HLD region are about 3 orders of magnitude smaller, indicating that the dust sources of this region greatly depend on weather conditions. Our spatial dust source distribution analysis modeling results showed evidence supporting a northern HLD belt, defined as the area north of 50∘ N, with a “transitional HLD-source area” extending at latitudes 50–58∘ N in Eurasia and 50–55∘ N in Canada and a “cold HLD-source area” including areas north of 60∘ N in Eurasia and north of 58∘ N in Canada, with currently “no dust source” area between the HLD and low-latitude dust (LLD) dust belt, except for British Columbia. Using the global atmospheric transport model SILAM, we estimated that 1.0 % of the global dust emission originated from the high-latitude regions. About 57 % of the dust deposition in snow- and ice-covered Arctic regions was from HLD sources. In the southern HLD region, soil surface conditions are favorable for dust emission during the whole year. Climate change can cause a decrease in the duration of snow cover, retreat of glaciers, and an increase in drought, heatwave intensity, and frequency, leading to the increasing frequency of topsoil conditions favorable for dust emission, which increases the probability of dust storms. Our study provides a step forward to improve the representation of HLD in models and to monitor, quantify, and assess the environmental and climate significance of HLD.

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Section: Comparison Of Various Regionsmentioning

confidence: 99%

Newly identified climatically and environmentally significant high-latitude dust sources

Meinander

Dagsson-Waldhauserová

Amosov

et al. 2022

Atmos. Chem. Phys.

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“…The so-called GF-analysis provide more detailed information on the HM fractionation in solid compartments of ecosystems. In this method, a bulk sample of soil, road dust, or other media is separated into its constituent particle size fractions (that is, G-analysis [97]), and then, for each G-fraction, a sequential extraction of HM chemical fractions (F-analysis) is carried out. Due to the laboriousness and complexity of interpretation of the obtained results, this approach is used not so often and is mainly devoted to the study of agricultural [98] and roadside soils [99], road dust [55,57,100], bottom sediments [101], and atmospheric aerosols [102,103].…”

Section: Assessment Of Solid Components Of the Environment Pollution With Hms' Chemical Fractionsmentioning

confidence: 99%

Integrated Assessment of Affinity to Chemical Fractions and Environmental Pollution with Heavy Metals: A New Approach Based on Sequential Extraction Results

Vodyanitskii

Власов

2021

IJERPH

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To assess the affinity degree of heavy metals (HMs) to geochemical phases, many indices with several limitations are used. Thus, this study aims to develop a new complex index for assessing contamination level and affinity to chemical fractions in various solid environmental media. For this, a new integrated approach using the chemical affinity index (CAF) is proposed. Comparison of CAF with %F on the literature examples on fractionation of HMs from soils, bottom sediments, atmospheric PM10, and various particle size fractions of road dust proved a less significant role of the residual HMs fraction and a greater contribution of the rest of the chemical fractions in the pollution of all studied environments. This fact is due to the normalization relative to the global geochemical reference standard, calculations of contribution of an individual element to the total pollution by all studied HMs, and contribution of the particular chemical fraction to the total HMs content taken into account in CAF. The CAF index also shows a more significant role in pollution and chemical affinity of mobile and potentially mobile forms of HMs. The strong point of CAF is the stability of the obtained HM series according to the degree of chemical affinity and contamination. Future empirical studies are necessary for the more precise assessment of CAF taking into account the spatial distribution of HMs content, geographic conditions, geochemical factors, the intensity of anthropogenic impact, environmental parameters (temperature, humidity, precipitation, pH value, the content of organic matter, electrical conductivity, particle size distribution, etc.). The combined use of CAF along with other indices allows a more detailed assessment of the strength of HMs binding to chemical phases, which is crucial for understanding the HMs’ fate in the environment.

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Elemental composition of the topsoil fine fraction at and around the Tibetan plateau

Huang

et al. 2023

Environmental Pollution

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Particle size partitioning of metals in humus horizons of two small erosional landforms in the middle Protva basin – a comparative study

Cited by 5 publications

References 27 publications

Newly identified climatically and environmentally significant high-latitude dust sources

Newly identified climatically and environmentally significant high-latitude dust sources

Integrated Assessment of Affinity to Chemical Fractions and Environmental Pollution with Heavy Metals: A New Approach Based on Sequential Extraction Results

Elemental composition of the topsoil fine fraction at and around the Tibetan plateau

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