Source, mobility, and bioavailability of metals in fjord sediments of Krossfjord-Kongsfjord system, Arctic, Svalbard

Choudhary, Shabnam; Nayak, G. N.; Khare, Neloy

doi:10.1007/s11356-020-07879-1

Cited by 18 publications

(5 citation statements)

References 51 publications

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“…The Kongsfjord sediment dominated with silty mud, whereas, clay content increased towards the inner region, which is a result of meltwater discharge and precipitation at the glacier termini (fjord head), causing a rapid accumulation of fine-grained sediments, that is a prominent increase in clay content (Choudhary et al, 2018;Choudhary et al, 2020;Hald & Korsun, 1997;Kotwicki et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

Stable isotopic signatures of sediment carbon and nitrogen sources and its relation to benthic meiofaunal distribution in the Arctic Kongsfjord

et al. 2021

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The interest of benthologists in meiofaunal organisms begin in the early 1980s (Giere, 2009). Meiofauna groups are characterized by tiny size with short generation time and continuous reproduction (Higgins & Thiel, 1988;Ingole et al., 2000). As they are very difficult to isolate from the sediment due to their small size, the lack of taxonomic materials for identification leads to neglecting this important invertebrate group from previous benthic studies

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Section: Discussionmentioning

confidence: 99%

Stable isotopic signatures of sediment carbon and nitrogen sources and its relation to benthic meiofaunal distribution in the Arctic Kongsfjord

et al. 2021

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“…The morphology of the ice can also influence the movement of contaminants and sediments. For instance, valley glaciers will move materials through the system much faster than large ice sheet outlet glaciers (Antoniazza and Lane, 2021; Choudhary et al, 2020; Lawson, 1982; Mao et al, 2020). Additionally, melting of the upper layers of snow, firn and ice will expose contaminants stored deeper within the glacier, increasing contaminant accrual and potentially accelerating melting processes (Gul et al, 2021).…”

Section: Contaminant Accumulation and Concentration Mechanismsmentioning

confidence: 99%

Anthropogenic contaminants in glacial environments I: Inputs and accumulation

Beard

Clason

Rangecroft

et al. 2022

Progress in Physical Geography: Earth and Environment

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Historically, glaciers have been seen as pristine environments. However, recent research has shown that glaciers can accumulate and store contaminants over long timescales, through processes such as atmospheric deposition, sedimentation, glacial hydrology and mass movements. Studies have identified numerous anthropogenically derived contaminants within the global cryosphere, including the six we focus on here: fallout radionuclides; microplastics; persistent organic pollutants; potentially toxic elements; black carbon and nitrate-based contaminants. These contaminants are relatively well-studied in other environments; however, their dynamics and role in glaciated systems is still poorly understood. Therefore, it is important to assess and quantify contaminant levels within the cryosphere, so that current and future threats can be fully understood and mitigated. In this first progress report ( Part I: Inputs and accumulation), we review the current state of knowledge of six of the most common anthropogenic contaminants found in the cryosphere, and consider their sources, transportation, accumulation and concentration within glacial systems. A second progress report ( Part II: Release and downstream consequences) will outline how these contaminants leave glacial systems and the consequences that this release can have for communities and ecosystems reliant on glacial meltwater.

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“…Glaciers are often referred to as “water towers”, storing vast amounts of the Earth’s freshwater (Viviroli et al, 2011), which is a crucial element in sustaining both human and ecosystem health (WHO, 2008). Contaminants released from glaciated environments are most mobile in fluvial settings, due to the speed at which sediment is transported in water and the gravity driven movements downstream (Choudhary et al, 2020; Strumness et al, 2004). High levels of nitrates can lead to eutrophication which can reduce water quality and endanger the sustainability of riverine ecosystems (Erickson et al, 2019; Owens et al, 2019; Schriks et al, 2010).…”

Section: Glacial Contaminants the Water-food-energy Nexus And Environ...mentioning

confidence: 99%

Anthropogenic contaminants in glacial environments II: Release and downstream consequences

Beard

Clason

Rangecroft³

et al. 2022

Progress in Physical Geography: Earth and Environment

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Anthropogenic contamination has been detected in glacial and proglacial environments around the globe. Through mechanisms of secondary release, these contaminants are finding their way into glacial hydrological systems and downstream environments, with potential to impact hundreds of millions of people who rely on glacial meltwater for water, food and energy security worldwide. The first part of our progress report outlined the sources and accumulation mechanisms of contaminants in glacial environments (Part I: Inputs and accumulation). Here we assess processes of contaminant release, pathways to downstream environments, and socio-environmental consequences. We reflect on the potential impacts these contaminants could have for human, ecosystem, and environmental health, as well as framing glacial contaminants within the context of the water-food-energy nexus. Improved understanding of these processes and impacts, while crucially embedding local knowledge, will help to develop key policy and mitigation strategies to address future risk of contaminant release from glaciers.

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Source, mobility, and bioavailability of metals in fjord sediments of Krossfjord-Kongsfjord system, Arctic, Svalbard

Cited by 18 publications

References 51 publications

Stable isotopic signatures of sediment carbon and nitrogen sources and its relation to benthic meiofaunal distribution in the Arctic Kongsfjord

Stable isotopic signatures of sediment carbon and nitrogen sources and its relation to benthic meiofaunal distribution in the Arctic Kongsfjord

Anthropogenic contaminants in glacial environments I: Inputs and accumulation

Anthropogenic contaminants in glacial environments II: Release and downstream consequences

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