Comment on gmd-2024-65

Published: June 14, 2024

Abstract. The Multi-Compartment Hg (mercury) Modeling and Analysis Project (MCHgMAP) is an international multi-model research initiative intended to simulate analyze the geospatial distributions temporal trends of environmental inform effectiveness evaluations two multilateral agreements (MEAs): Minamata Convention on Mercury (MC) Long-Range Transboundary Air Pollution (LRTAP). This MCHgMAP overview paper presents its science objectives, background rationale, experimental design (multi-model ensemble (MME) architecture, inputs evaluation data, simulations reporting framework), methodologies for analysis simulated levels. primary goals project are facilitate detection attribution recent (observed) future (projected) spatial patterns global levels, identification key knowledge gaps in modeling improve cycles MEAs. current advances challenges models, emission inventories, observational data examined, optimized introduced addressing policy questions A common set emissions, conditions, observation datasets proposed (where possible) enhance MME comparability. novel harmonized simulation approach between atmospheric, land, oceanic multi-media models developed account short- long-term changes secondary exchanges achieve mechanistic consistency levels across matrices. comprehensive model experiments prioritized ensure a systematic participation variety from scientific community.

Language: Английский

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Mercury contamination and potential health risk to French seabirds: A multi-species and multi-site study

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 952, P. 175857 - 175857

Published: Aug. 28, 2024

Mercury (Hg) is a naturally occurring highly toxic element which circulation in ecosystems has been intensified by human activities. Hg widely distributed, and marine environments act as its main final sink. Seabirds are relevant bioindicators of pollution chicks particularly suitable for biomonitoring pollutants they reflect contamination at short spatiotemporal scales. This study aims to quantify blood identify drivers (trophic ecology inferred from stable isotopes carbon (δ

Language: Английский

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Mercury bioaccumulation and assimilation in marine plankton in meltwater influenced fjords and shelf waters along the east coast of Greenland.

Environmental Pollution, Journal Year: 2024, Volume and Issue: unknown, P. 125473 - 125473

Published: Dec. 1, 2024

The rapid melting of the Arctic cryosphere due to climate change will result in significant freshwater input into marine ecosystems. This might also cause release legacy mercury (Hg) stored cryosphere, increasing Hg concentration and its subsequent effects on biota. However, there is scarce knowledge lower trophic level organisms at base pelagic food web. particularly important since these modulate transfer higher levels, including fish mammals. We quantified two plankton size classes (> 200 50 - μm) coastal waters along east Greenland coast investigated potential assimilation efficiency both inorganic (IHg) methyl (MeHg) mesozooplankton their faecal pellets experimental incubations. ranged from 12 109 ng (g dw)

Language: Английский

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Chemical pollution and the ocean

Elsevier eBooks, Journal Year: 2023, Volume and Issue: unknown, P. 351 - 426

Published: Jan. 1, 2023

Language: Английский

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Survival of the Fattest: Species-Specific Response of Arctic Zooplankton to Inorganic Mercury (Ihg) and Methyl Mercury (Mehg)

Published: Jan. 1, 2023

Arctic marine ecosystems are considered hotspots for atmospheric Hg deposition, with concentrations expected to increase in the near future. Despite this, little is known about sensitivity of organisms at base food web inorganic (IHg) and organic (methyl- MeHg) mercury. We investigated acute toxicity response key arctic zooplankton species Acartialongiremis, Calanus glacialis, C. finmarchicus, Oithona similis, Pseudocalanus sp., copepod nauplii Synchaeta sp. two types, as a function mercury concentration, exposure time, length lipid volume species. In addition, we sublethal effects on ingestion faecal pellet egg production rates glacialis finmarchicus low concentrations. observed species-specific 48-h LC50 values ranging from 7 101 µg L-1 IHg 8 120 MeHg increasing an time. Acute both types was typically negatively correlated more toxic than all except where large reserves might have slowed reduced fecal by 39-100 %. Our results indicate that smaller poor less tolerant larger lipid-rich

Language: Английский

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