Environmental Pollution, Journal Year: 2024, Volume and Issue: 355, P. 124185 - 124185
Published: May 21, 2024
Language: Английский
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: Jan. 30, 2025
Human activities have emitted substantial mercury into the atmosphere, significantly impacting ecosystems and human health worldwide. Currently, consistent methodologies to evaluate long-term emissions across countries industries are scant, hindering efforts prioritize emission controls. Here, we develop a high-spatiotemporal-resolution dataset comprehensively analyze global anthropogenic patterns. We show that increased 330% during 1960–2021, with declines in developed Global North since 1990s China 2010s completely offset by rapid growth South (excluding China). Consequently, continued rise slightly 2013 Minamata Convention. In 2021, produced two-thirds of emissions, despite comprising only one-fifth economy. predict that, although large uncertainties exist, under business-as-usual scenario could increase 10%-50% 2030. Our findings demonstrate control has reached critical juncture, highlighting urgent need target reductions prevent worsening environmental impacts. from South, which now produces emissions. Without action, 10%–50%
Language: Английский
Citations
4
Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)
Published: Jan. 21, 2025
Mercury (Hg) contamination poses a persistent threat to the remote Arctic ecosystem, yet mechanisms driving pronounced summer rebound of atmospheric gaseous elemental Hg (Hg0) and its subsequent fate remain unclear due limitations in large-scale seasonal studies. Here, we use an integrated atmosphere–land–sea-ice–ocean model simulate cycling comprehensively. Our results indicate that oceanic evasion is dominant source (~80%) Hg0 rebound, particularly driven by seawater release facilitated ice melt (~42%), with further contributions from anthropogenic deposition terrestrial re-emissions. Enhanced dry across coastal regions, especially tundra, during highlights potential transport pristine Ocean ecosystems. warming, transition multi-year first-year tundra greening, expected amplify intensify uptake increased vegetation growth, underlining urgent need for continued research evaluate mitigation strategies effectively context changing Arctic. The mercury has been debated decades. This study uses process-based show sea drives emissions increases highlighting key role
Language: Английский
Citations
1
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: Aug. 14, 2023
Atmospheric gaseous elemental mercury (GEM) concentrations in the Arctic exhibit a clear summertime maximum, while origin of this peak is still matter debate community. Based on observations during Multidisciplinary drifting Observatory for Study Climate (MOSAiC) expedition and modeling approach, we further investigate sources atmospheric Hg central Arctic. Simulations with generalized additive model (GAM) show that long-range transport anthropogenic terrestrial from lower latitudes minor contribution (~2%), more than 50% explained GEM variability caused by oceanic evasion. A potential source function (PSCF) analysis shows evasion not significant throughout ice-covered Ocean but mainly occurs Marginal Ice Zone (MIZ) due to specific environmental conditions region. Our results suggest regional process could be leading contributor observed maximum. In context rapid warming increase width MIZ, may become strengthen role as Hg.
Language: Английский
Citations
14
Elementa Science of the Anthropocene, Journal Year: 2024, Volume and Issue: 12(1)
Published: Jan. 1, 2024
The international and interdisciplinary sea-ice drift expedition “The Multidisciplinary drifting Observatory for the Study of Arctic Climate” (MOSAiC) was conducted from October 2019 to September 2020. aim MOSAiC study interconnected physical, chemical, biological characteristics processes atmosphere deep sea central system. ecosystem team addressed current knowledge gaps explored unknown properties over a complete seasonal cycle focusing on three major research areas: biodiversity, biogeochemical cycles, linkages environment. In addition measurements core along cycle, dedicated projects covered specific habitats, or organisms higher taxonomic temporal resolution in time windows. A wide range sampling instruments approaches, including coring, lead with pumps, rosette-based water sampling, plankton nets, remotely operated vehicles, acoustic buoys, applied address science objectives. Further, broad process-related address, example, productivity patterns, migrations, diversity shifts, were made both situ onboard RV Polarstern. This article provides detailed overview approaches used main It highlights program examples habitat- process-specific sampling. initial results presented include high activities wintertime discovery hotspots underexplored habitats. unique interconnectivity coordinated efforts also revealed insights into cross-disciplinary interactions like impact biota cloud formation. further presents lessons learned conducting such demanding field campaign an outlook spin-off be next years.
Language: Английский
Citations
5
Journal of Geophysical Research Atmospheres, Journal Year: 2025, Volume and Issue: 130(2)
Published: Jan. 27, 2025
Abstract Oceanic emission of gaseous elemental mercury (Hg 0 or GEM) is an important source for atmospheric (Hg), but existing estimates global gross oceanic Hg emissions are highly variable (800–7,220 Mg yr −1 ). This study measured GEM concentrations and isotopic compositions at two coastal sites in Terengganu, Malaysia, a region that receives air masses from both hemispheres, during 2019–2021 to diagnose the amount emissions. Significantly lower mean (±1sd) concentration (1.28 ± 0.20 ng m −3 ), Δ 199 (−0.23 0.03‰), 200 (−0.066 0.018‰) significantly higher δ 202 (0.43 0.12‰) were observed wet season when predominantly Southern Hemisphere, compared with those (mean concentration, Hg, 1.77 0.09 , −0.17 0.03‰, −0.045 0.023‰, 0.25 0.11‰, respectively) dry Northern suggesting interhemispheric difference its compositions. Using mass balance model, we estimated II reduction should be below 2,250 891 (±1sd), which low‐end range literature reported values. We then used constrained value as input three‐dimensional isotope model reproduced well distributions gradient Hg. The findings present will help better understand oceans their roles cycling.
Language: Английский
Citations
0
Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 18, 2025
Polycyclic aromatic compounds (PACs), including harmful polycyclic hydrocarbons (PAHs) and more toxic derivatives, are continuously released contaminants. Their provenance dynamics in coastal oceans remain poorly understood. This study presents the first comprehensive assessment of PACs by combining their presence with key hydrological biogeochemical indicators, potential microbial degradation. High concentrations Σ92PACs (48–660 ng/L) were observed East China Sea, influenced vertically upwelling related sediment resuspension during winter. Spatial heterogeneity reveals distinct distribution patterns: PAHs alkyl-PAHs mainly riverine inputs, horizontal transport via currents, fronts acting as barriers, contrast, oxygen-PAHs nitro-PAHs primarily shaped secondary transformations within warm water masses rich nutrients. The relationship between dissolved chlorophyll a underscores dominance biodegradation over marginal biological pump effect wintertime low primary productivity. Metagenomic analysis further highlights degradation crucial PAC removal pathway, enhanced diversity driven terrigenous advection upwelling. methodologies findings this research provide valuable insights into cycling oceans.
Language: Английский
Citations
0
Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 126254 - 126254
Published: April 1, 2025
Language: Английский
Citations
0
Acta Oceanologica Sinica, Journal Year: 2025, Volume and Issue: unknown
Published: May 24, 2025
Language: Английский
Citations
0
Progress In Oceanography, Journal Year: 2024, Volume and Issue: 222, P. 103224 - 103224
Published: Feb. 18, 2024
Despite the lack of local anthropogenic mercury sources, methylated (MeHg) concentrations in Arctic biota are higher than from lower latitudes. The main entry route occurs during bioconcentration seawater monomethylmercury (MMHg) into phytoplankton. known seasonal changes biological activity region, little is about cycling total (THg) and MeHg Ocean. Here, we report THg sampled northwestern Barents Sea water column late winter spring. In upper 500 m, significantly spring (0.64 ± 0.09 pmol L-1) compared to (0.53 0.07 L-1), driven by inputs surface waters atmospheric deposition dynamics changing sea ice conditions. Contrastingly, were (41 39 fmol (85 42 L-1). We suggest that most biotically demethylated both phytoplankton bacteria, with additional losses photodemethylation evasion. Our observations highlight importance demethylation potential uptake methylmercury coinciding bloom. Lastly, use our new data together previously published region construct a simplified cycle an marginal zone.
Language: Английский
Citations
3
EarthArXiv (California Digital Library), Journal Year: 2023, Volume and Issue: unknown
Published: Dec. 8, 2023
An international and interdisciplinary sea ice drift expedition, the ‘The Multidisciplinary drifting Observatory for Study of Arctic Climate‘ (MOSAiC), was conducted from October 2019 to September 2020. The aim MOSAiC study interconnected physical, chemical biological characteristics processes atmosphere deep central system. ecosystem team addressed current knowledge gaps explored unknown properties over a complete seasonal cycle focusing on three major research areas: biodiversity, biogeochemical cycles linkages environment. In addition coverage core along cycle, dedicated projects covered specific habitats, or organisms higher taxonomic temporal resolution. A wide range sampling approaches sampling, coring, lead CTD rosette-based water plankton nets, ROVs acoustic buoys applied address science objectives. Further, process-related measurements e.g. productivity patterns, migrations diversity shifts were both in situ onboard RV Polarstern. This paper provides detailed overview used main It highlights program examples two habitat- process-specific projects. First results presented include high activities winter time discovery hotspots underexplored habitats. unique interconnectivity coordinated efforts also revealed insights into cross-disciplinary interactions like impact biota cloud formation. further presents lessons learned conducting such demanding field campaign an outlook spin-off be next years.
Language: Английский
Citations
4