A5046307779- Coral and Marine Ecosystems Studies
- Marine and fisheries research
- Oceanographic and Atmospheric Processes
- Methane Hydrates and Related Phenomena
- Marine and coastal plant biology
- Geology and Paleoclimatology Research
- Marine and coastal ecosystems
- Fish Ecology and Management Studies
- Marine Biology and Ecology Research
- Arctic and Antarctic ice dynamics
- Microplastics and Plastic Pollution
- Geological and Geophysical Studies
- Climate variability and models
- Fluid Dynamics and Turbulent Flows
- Ocean Acidification Effects and Responses
- Marine and Offshore Engineering Studies
- demographic modeling and climate adaptation
- Marine animal studies overview
- Marine and environmental studies
- Ichthyology and Marine Biology
- Isotope Analysis in Ecology
- Avian ecology and behavior
- Geological formations and processes
- Maritime Security and History
- Ocean Waves and Remote Sensing
University of Oxford
2020-2024
Stockholm University
2023
Norwegian Meteorological Institute
2023
Okinawa Institute of Science and Technology Graduate University
2020-2022
Vast quantities of debris are beaching at remote islands in the western Indian Ocean. We carry out marine dispersal simulations incorporating currents, waves, winds, beaching, and sinking, for both terrestrial sources debris, to predict where this comes from. Our results show that most these Ocean drifts from Indonesia, India, Sri Lanka. Debris associated with fisheries shipping also poses a major risk. accumulation Seychelles is likely seasonal, peaking during February-April. This pattern...
Abstract Many countries with tropical reef systems face hard choices preserving coral reefs in the of climate change on limited budgets. One approach to maximising regional resilience is targeting management efforts and resources at that export large numbers larvae other reefs. However, this requires connectivity be quantified. To map Seychelles system we carried out a population genomic study Porites lutea species complex using 241 sequenced colonies from multiple islands. identify...
Abstract The oceans play a major role in the earth’s climate by regulating atmospheric CO 2 . While oceanic primary productivity and organic carbon burial sequesters from atmosphere, precipitation of CaCO 3 sea returns to atmosphere. Abiotic form aragonite is potentially an important feedback mechanism for global cycle, but this process has not been fully quantified. In sediment-trap study conducted southeastern Mediterranean Sea, one fastest warming most oligotrophic regions ocean, we...
Vast quantities of marine debris have beached at remote islands in the western Indian Ocean such as Seychelles, but little is known about where this comes from. To identify these sources and temporal patterns accumulation rate, we carried out global Lagrangian particle tracking experiments incorporating surface currents, waves, variable windage, beaching, sinking rates, taking into account both terrestrial (coastal populations rivers) (fisheries shipping) debris. Our results show that,...
Abstract Coral larval dispersal establishes connectivity between reefs, but fluxes vary over timescales from daily to multidecadal due oceanographic variability. Using a 2‐km‐resolution ocean model, we simulate spawning events 1993 2019 and assess the potential all reefs in tropical southwest Indian Ocean. Although there is significant seasonal cycle connectivity, day‐to‐day variability generally dominates. Larval pathways on any particular day provide limited information about few days...
Abstract The tropical southwest Indian Ocean is a coral biodiversity hotspot, with remote reefs physically connected by larval dispersal through eddies and complex set of equatorial boundary currents. Based on multidecadal, 2 km resolution hydrodynamic models that incorporate temporal variability in dispersal, we find powerful zonal currents, current bifurcations, geographic isolation act as leaky barriers, partitioning the into clusters tend to consistently retain larvae, therefore gene...
Abstract The Kuroshio Current is a major hydrographical feature of the modern East China Sea, but it has been suggested that its flow was diverted to east Ryukyu Arc at Last Glacial Maximum. Shoaling Yonaguni Depression also proposed as cause diversion which, while unlikely have significant Maximum, may an important consideration further back in time. Using ensemble high‐resolution ocean simulations with climatic boundary conditions emulating those we present first regional state estimates...
Abstract Climate change is one of the top three global threats to seabirds, particularly species that visit polar regions. Arctic terns migrate between both regions annually and rely on productive marine areas forage, sea ice for rest foraging, prevailing winds during flight. Here, we report 21st‐century trends in environmental variables affecting arctic at key locations along their Atlantic/Indian Ocean migratory flyway non‐breeding seasons, identified through tracking data. End‐of‐century...
Abstract. The Western INDian Ocean Simulation (WINDS) is a regional configuration of the Coastal and Regional Community Model (CROCO) for southwestern Indian Ocean. WINDS has horizontal resolution 1/50∘ (∼2 km) spans latitudinal range 23.5∘ S–0∘ N longitudinal from East African coast to 77.5∘ E. We ran two experiments using configuration: WINDS-M, full 28-year multidecadal run (1993–2020); WINDS-C, 10-year climatological control with monthly forcing. was primarily buoyant Lagrangian particle...
Abstract. Coral larval dispersal establishes connectivity between reefs, but fluxes vary over timescales from daily to multidecadal due oceanographic variability. Using a 2 km-resolution ocean model, we simulate spawning events 1993–2019 (for total of almost 10,000 events) across all coral reefs in the tropical southwest Indian Ocean. Although there is significant seasonal cycle potential at many day-to-day variability generally dominates. The importance this depends on local geography and...
Abstract. Coral larval dispersal establishes connectivity between reefs, but fluxes vary over timescales from daily to multidecadal due oceanographic variability. Using a 2 km-resolution ocean model, we simulate spawning events 1993–2019 (for total of almost 10,000 events) across all coral reefs in the tropical southwest Indian Ocean. Although there is significant seasonal cycle potential at many day-to-day variability generally dominates. The importance this depends on local geography and...
Abstract Neodymium isotopic composition (εNd) has enjoyed widespread use as a palaeotracer, principally because it behaves quasi-conservatively in the modern ocean. However, recent bottom water εNd reconstructions from eastern North Atlantic are difficult to interpret under assumptions of conservative behaviour. The observation that this apparent departure behaviour increases with enhanced ice-rafted debris (IRD) fluxes resulted suggestion IRD leads overprinting through reversible...
Past coral range expansions suggest that high-latitude environments may serve as refugia, potentially buffering tropical biodiversity loss due to climate change. We explore this possibility for corals globally, using a dynamical metacommunity model incorporating temperature, light intensity, pH, and four distinct, interacting assemblages. This reasonably reproduces the observed distribution recent decline of across Indo-Pacific Caribbean. Our simulations there is mismatch between timescales...
Abstract We study the impacts of a continental slope on instability and mesoscale eddy fluxes in idealized 3‐layer numerical model simulations. The simulations are inspired by mimic situation Arctic Ocean's Beaufort Gyre, where anti‐cyclonic winds drive currents that guided slope. forcing retrograde with respect to topographic Rossby waves. focus analysis is potential vorticity (PV) eddy‐mean flow interactions under Transformed Eulerian Mean framework. Eddy lateral dominate over form stress,...
Abstract. Understanding past dynamics of upwelling cells is an important aspect assessing potential changes in future climate change scenarios. Our present understanding nutrient fluxes throughout the world's oceans emphasizes importance intermediate waters transporting nutrients from Antarctic divergence into middle and lower latitudes. These nutrient-rich fuel productivity within wind-driven all major oceans. One such system located along Oman margin western Arabian Sea (WAS). Driven by...
Vast quantities of debris are beaching at remote islands in the western Indian Ocean, despite minimal or zero local sources pollution. We carry out marine dispersal simulations, informed by observations, incorporating currents, waves, winds, beaching, and sinking, for both terrestrial debris, to predict where this comes from. Our results show that most these Ocean drifts from Indonesia, India, Sri Lanka, although we also find evidence a large fraction bottles polluting may have been...
Abstract. Understanding the behavior of past upwelling cells is paramount when assessing future climate changes. Our present understanding nutrient fluxes throughout world's oceans emphasizes importance intermediate waters transporting nutrients from Antarctic divergence into middle and lower latitudes. These nutrient-rich fuel productivity within wind-driven in all major oceans. One such cell located along Oman Margin Western Arabian Sea (WAS). Driven by cross-hemispheral winds, WAS zone’s...
Larval dispersal component of SECoWThe larval SECoW assumes that coral larvae physically behave as positively buoyant, otherwise passive particles, which are advected by surface currents for 120 days after spawning, using a fourth-order explicit Runge-Kutta scheme in OceanParcels.Coral weak swimmers compared to horizontal ocean (Kingsford et al., 2002;Hata 2017) but the vertical position water column is more challenging constrain.Although newly fertilised eggs generally buoyant (Szmant and...
The tropical southwest Indian Ocean is a coral biodiversity hotspot, with remote reefs physically connected by larval dispersal through eddies and complex set of equatorial boundary currents. Based on multidecadal, 2 km resolution hydrodynamic models that incorporate temporal variability in dispersal, we find powerful zonal currents, current bifurcations, geographic isolation act as leaky barriers, partitioning the into clusters tend to consistently retain larvae, therefore gene flow, over...