Seasonality and response of ocean acidification and hypoxia to major environmental anomalies in the southern Salish Sea, North America (2014–2018)

Biogeosciences, Journal Year: 2024, Volume and Issue: 21(7), P. 1639 - 1673

Published: April 4, 2024

Abstract. Coastal and estuarine ecosystems fringing the North Pacific Ocean are particularly vulnerable to ocean acidification, hypoxia, intense marine heatwaves as a result of interactions among natural anthropogenic processes. Here, we characterize variability during seasonally resolved cruise time series (2014–2018) in southern Salish Sea (Puget Sound, Strait Juan de Fuca) nearby coastal waters for select physical (temperature, T; salinity, S) biogeochemical (oxygen, O2; carbon dioxide fugacity, fCO2; aragonite saturation state, Ωarag) parameters. Medians some parameters peaked (T, surface summer, whereas others (S, O2, fCO2) changed progressively across spring–fall, all monotonically or were relatively stable at depth. Ranges varied considerably basins within study region, with stratified consistently most variable. Strong environmental anomalies occurred series, allowing us also qualitatively assess how these affected seasonal patterns interannual variability. The peak temperature anomaly associated 2013–2016 northeast heatwave–El Niño event was observed boundary October 2014 cruise, but Puget Sound cruises revealed largest increases 2015–2016 timeframe. extreme hypoxia acidification measurements date recorded Hood Canal (which had conditions) same period; however, they shifted earlier year relative previous events. During autumn 2017, after heat anomaly, distinct carbonate system unprecedentedly low Ωarag values high fCO2 parts that not normally so acidified. This novel “CO2 storm” appears have been driven by anomalously river discharge which resulted enhanced stratification inferred primary productivity anomalies, indicated persistently fCO2, chlorophyll. Unusually, this CO2 decoupled from O2 dynamics compared past complex interplay weather, hydrological, circulation multi-stressor scenarios will potentially affect regional under changing climate. Further, frequencies observations crossed known preliminary species' sensitivity thresholds illustrates risk landscape temperature, present day, implications multiple stressors may combine potential migration, survival, physiological challenges key species. data product used publication is available https://doi.org/10.25921/zgk5-ep63 (Alin et al., 2022), an additional including calculated https://doi.org/10.25921/5g29-q841 2023).

Language: Английский

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Limnology and the Science of Biosensors

Advances in environmental engineering and green technologies book series, Journal Year: 2024, Volume and Issue: unknown, P. 194 - 203

Published: May 23, 2024

Increasing concern about levels of pollution in the aquatic environment has led to adoption a number preventive measures assist maintaining quality water bodies. The development new user-friendly, portable, and low-cost bioanalytical methods is focus research, biosensors are forefront these research works. Biosensors have various prospective existing applications detection contaminants by transducing signal. able detect wide range analytes complex matrices proven great potential monitoring, clinical diagnostics food analysis Hence, aim this work provide description state art application freshwater ecosystems.

Language: Английский

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Mixing and dilution controls on marine CO₂ removal using alkalinity enhancement

Environmental Research Letters, Journal Year: 2024, Volume and Issue: 19(10), P. 104039 - 104039

Published: Aug. 29, 2024

Abstract Marine CO 2 removal (CDR) using enhanced-alkalinity seawater discharge was simulated in the estuarine waters of Salish Sea, Washington, US. The high-alkalinity would be generated bipolar membrane electrodialysis technology to remove acid and alkaline stream returned sea. Response receiving evaluated a shoreline resolving hydrodynamic model with biogeochemistry, carbonate chemistry. Two sites, two deployment scales, each enhanced TA 2997 mmol m −3 pH 9 were simulated. effects on air-sea flux near-field as well over larger estuary wide domain assessed. large-scale (addition 164 Mmoles yr −1 ) small embayment (Sequim Bay, 12.5 km resulted 2066 T (45% total simulated) at rate 3756 −2 , higher than 63 required globally 1.0 GT . It also reduced acidity bay, ΔpH ≈ +0.1 units, an amount comparable historic impacts anthropogenic acidification Sea. mixing dilution added distance from source results CDR rates such that 2176 removed >1000 fold area rest domain. There is potential for more occurring beyond region modeled. reduction outgassing between October May accounts much 90% Of total, only 375 (8%) open shelf portion With shallow depths limiting vertical mixing, nearshore may provide rapid alkalinity enhancement relative deeper oceanic sites.

Language: Английский

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Sensitivity of pteropod calcification to multi stressor variability in coastal habitats

Marine Environmental Research, Journal Year: 2024, Volume and Issue: 204, P. 106868 - 106868

Published: Dec. 12, 2024

Language: Английский

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