Anomalous ocean currents and European anchovy dispersal in the Iberian ecosystem

Marine Ecology Progress Series, Год журнала: 2024, Номер 741, С. 289 - 300

Опубликована: Янв. 22, 2024

Unlike other upwelling areas where sardine and anchovy species dominate the pelagic ecosystems, Western Iberian ecosystem has been consistently dominated by European Engraulis encrasicolus , while had a residual presence from start of acoustic surveys, in 1989, to 2014. Since 2015, abundance margins sharply increased continues show an increasing trend as 2023. It is unclear if this increase result dispersal nearby recruitment areas, higher survival rates early life stages due favorable environmental conditions, or both. We used set different models simulate dispersion region for years preceding abundance. An ocean model simulation with CROCO provided fields background Lagrangian simulations coupled individual-based eggs larvae. simulated 2013-2015, results that 2014 anomalous upper-ocean circulation patterns strong persistent westward currents transported large number larvae Bay Biscay (BoB) along Northern margin. The maximum transport occurred June July when 8 4%, respectively, spawned BoB potentially reached west coast This process might explain ecosystem. study episodes intense currents, coincident high eggs, can lead colonization new connectivity between varies dramatically time.

Язык: Английский

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Long-term variability and trends in the Agulhas Leakage and its impacts on the global overturning

Ocean science, Год журнала: 2025, Номер 21(1), С. 93 - 112

Опубликована: Янв. 21, 2025

Abstract. Agulhas Leakage transports relatively warm and salty Indian Ocean waters into the Atlantic as such is an important component of global ocean circulation. These are part upper limb meridional overturning circulation (AMOC), variability has been linked to AMOC variability. expected increase under a warming climate due southward shift in Southern Hemisphere westerlies, which could further influence dynamics. This study uses set high-resolution preindustrial control, historical transient simulations with Community Earth System Model (CESM) nominal horizontal resolution 0.1° for sea ice 0.25° atmosphere land. At these resolutions, model represents necessary scales investigate transport its relation AMOC. The simulated 19.7 ± 3 Sv lies well within observed range 21.3 4.7 Sv. A positive correlation between Current shown, meaning that leads Leakage. impacts strength through Rossby wave dynamics alter cross-basin geostrophic balance time lag 2–3 years. Furthermore, salt associated influences salt–advection feedback by reducing AMOC's freshwater at 34° S. indeed increases strengthened southward-shifting winds. In contrast, decreases decrease Indonesian Throughflow wind-driven subtropical gyre. accompanied higher Ocean, play role stability via feedback.

Язык: Английский

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Long-term Variability and Trends of Agulhas Leakage and its Impacts on the Global Overturning

Опубликована: Июль 31, 2024

Abstract. Agulhas Leakage transports warm and salty Indian Ocean waters into the Atlantic as such is an important component of global ocean circulation. These are part upper limb Meridional Overturning Circulation (AMOC), variability has been linked to AMOC variability. expected increase under a warming climate due southward shift in South Hemisphere westerlies, which could further influence dynamics. This study uses set high-resolution pre-industrial control historical transient simulations with Community Earth System Model (CESM) nominal horizontal resolution 0.1° for sea-ice 0.25° atmosphere land. At these resolutions, model represents necessary scales investigate transport its relation AMOC. The simulated 19.7 ± 3 Sv lies well within observed range 21.3 4.7 Sv. A positive correlation between Current shown, meaning that leads Leakage. impacts strength through Rossby wave dynamics alter cross-basin geostrophic balance time-lag 2–3 years. Furthermore, salt flux associated influences salt-advection feedback by reducing AMOC’s freshwater at 34° S. indeed increases strengthened shifting winds. In contrast, decreases, both decrease Indonesian Throughflow wind-driven subtropical gyre. accompanied higher Ocean, suggests destabilisation salt-advection-feedback.

Язык: Английский

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Particle tracking modelling in coastal marine environments: Recommended practices and performance limitations

Ecological Modelling, Год журнала: 2025, Номер 501, С. 110999 - 110999

Опубликована: Янв. 20, 2025

Язык: Английский

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The reflux of water transport in the intermediate layer of Luzon Strait

Ocean Dynamics, Год журнала: 2025, Номер 75(3)

Опубликована: Фев. 19, 2025

Язык: Английский

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Disentangling marine plastic impacts in Life Cycle Assessment: Spatially explicit Characterization Factors for ecosystem quality

The Science of The Total Environment, Год журнала: 2024, Номер 949, С. 175019 - 175019

Опубликована: Июль 24, 2024

Язык: Английский

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Lagrangian modelling of reactive contaminant transport in the multi-component marine medium

Computers & Geosciences, Год журнала: 2024, Номер 187, С. 105579 - 105579

Опубликована: Март 22, 2024

Язык: Английский

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Transport Pathways for Iron Supply to the Australian Antarctic Ridge Phytoplankton Bloom

Geophysical Research Letters, Год журнала: 2024, Номер 51(14)

Опубликована: Июль 11, 2024

Abstract Biological productivity in the Southern Ocean is modulated by iron availability. Every summer, a large phytoplankton bloom forms northwest of Ross Sea, above Antarctic Australian Ridge (AAR), due to plume iron‐rich waters. Here, we investigate origin and trajectories these waters analyzing water mass observations Lagrangian experiments. Output from State Estimate (SOSE) situ measurements reveal that AAR share properties with Modified Circumpolar Deep Water (MCDW), which on shelf‐slope. The experiments are conducted using SOSE velocities. Bloom tracked virtual particles highlight an along isopycnal pathway MCDW Antarctica's shelf‐slope site, illustrating advection Balleny Gyre. These results supported temperature‐salinity analyses, show correlation between advected northwards; properties; high concentrations.

Язык: Английский

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Predictive Modelling of Sea Debris around Maltese Coastal Waters

Опубликована: Июль 22, 2024

The accumulation of sea surface debris around the coastal waters Malta poses significant ecological and environmental challenges, negatively affecting marine ecosystems human activities. This issue is exacerbated by lack an effective system tailored to predict movement specifically for Islands Malta. To address this gap, a pipeline that combines machine learning (ML) based prediction with physics-based model proposed. uses historical currents (SSC) velocities data forecast future conditions visualise movement. Central are LSTM GRU models, trained SSC next 24 hours specific area. These predictions then utilised Lagrangian simulate movement, providing insights into dispersion patterns. A comparative evaluation models showed outperformed model, lower error metrics such as mean absolute (MAE), squared (MSE), root (RMSE), alongside narrower interquartile ranges (IQR). method offers approach addressing accurately predicting visualising improving cleanup operations, conservation strategies.

Язык: Английский

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Comment on egusphere-2024-2288

Опубликована: Авг. 13, 2024

Abstract. Agulhas Leakage transports warm and salty Indian Ocean waters into the Atlantic Ocean  as such is an important component of global ocean circulation. These are part upper limb Meridional Overturning Circulation (AMOC), variability has been linked to AMOC variability. expected increase under a warming climate due southward shift in South Hemisphere westerlies, which could further influence dynamics. This study uses set high-resolution pre-industrial control historical transient simulations with Community Earth System Model (CESM) nominal horizontal resolution 0.1° for sea-ice 0.25° atmosphere land. At these resolutions, model represents necessary scales investigate transport its relation AMOC. The simulated 19.7 ± 3 Sv lies well within observed range 21.3 4.7 Sv. A positive correlation between Current shown, meaning that leads Leakage. impacts strength through Rossby wave dynamics alter cross-basin geostrophic balance time-lag 2–3 years. Furthermore, the  salt flux associated influences salt-advection feedback by reducing AMOC’s freshwater at 34° S. indeed increases strengthened shifting winds. In contrast, decreases, both decrease Indonesian Throughflow wind-driven subtropical gyre. accompanied higher Ocean, suggests destabilisation salt-advection-feedback.

Язык: Английский

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