Charles G. Hannah
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View article: Drivers of oxygen variability on the Canadian Pacific shelf in the context of emerging hypoxia
Drivers of oxygen variability on the Canadian Pacific shelf in the context of emerging hypoxia Open
View article: Dissolved Oxygen Variability on the Canadian Pacific Shelf: Trends, Drivers, and Projections in the Context of Emerging Hypoxia in Queen Charlotte Sound
Dissolved Oxygen Variability on the Canadian Pacific Shelf: Trends, Drivers, and Projections in the Context of Emerging Hypoxia in Queen Charlotte Sound Open
Hypoxia is an increasing concern along the Northeast Pacific continental margin, driven by dissolved oxygen () declines related to a warming climate. Although the North Pacific inventory has declined for decades, hypoxia was rarely observe…
View article: Arctic warming as a potential trigger for the warm blob in the northeast Pacific
Arctic warming as a potential trigger for the warm blob in the northeast Pacific Open
The northeast (NE) Pacific has experienced significant marine heatwaves (MHWs) in recent years, commonly known as “warm blobs.” This study examines the impact of Arctic warming, particularly in the Eastern Siberian-Chukchi Sea (ES-CS) regi…
View article: Regression-based characterization of the marine carbonate system across shelf and nearshore waters of Queen Charlotte Sound
Regression-based characterization of the marine carbonate system across shelf and nearshore waters of Queen Charlotte Sound Open
View article: Oxygen dynamics in a deep‐silled fjord: Tight coupling to the open shelf
Oxygen dynamics in a deep‐silled fjord: Tight coupling to the open shelf Open
Oxygen is declining globally in subsurface seawater. Fjords are particularly susceptible to hypoxia, because entrance sills restrict water circulation. We studied the oxygen dynamics of the Kitimat Fjord System on the west coast of Canada,…
View article: Propagating Particle Tracking Uncertainty Defined by Fuzzy Numbers in Spatially Variable Velocity Fields
Propagating Particle Tracking Uncertainty Defined by Fuzzy Numbers in Spatially Variable Velocity Fields Open
Accurate prediction of the trajectories of material drifting on the ocean surface is critical for risk assessment and responses to environmental emergencies. Prediction of these trajectories is subject to uncertainty arising from a number …
View article: Winter Arctic Outflow Winds Cause Upper Ocean Cooling and Reoxygenation in a Temperate Canadian Fjord
Winter Arctic Outflow Winds Cause Upper Ocean Cooling and Reoxygenation in a Temperate Canadian Fjord Open
Arctic outflow winds bring cold air from the continent to the coastline through mountain passes. Using observational data and a 2‐D model, we show that a February 2019 outflow event caused the upper 100 m in Bute Inlet, British Columbia (w…
View article: Tidal Currents in Douglas Channel, British Columbia: Evaluation and Prediction
Tidal Currents in Douglas Channel, British Columbia: Evaluation and Prediction Open
Douglas Channel is the principal shipping route between the town of Kitimat and the Pacific Ocean. Prediction of near-surface currents is crucial for safe tanker navigation and cleaning-up oil spills. Three years of current velocity data w…
View article: Drivers and Potential Consequences of Observed Extreme Hypoxia Along the Canadian Pacific Continental Shelf
Drivers and Potential Consequences of Observed Extreme Hypoxia Along the Canadian Pacific Continental Shelf Open
Bottom waters of the northeast Pacific continental shelf naturally experience localized hypoxic conditions, with significant influences on food webs and biogeochemical cycling. In August 2021, extreme hypoxia was detected from several meas…
View article: Distinctive stratification regimes and their biochemical implications across Queen Charlottte Sound, a highly-productive shelf in the Northeast Pacific
Distinctive stratification regimes and their biochemical implications across Queen Charlottte Sound, a highly-productive shelf in the Northeast Pacific Open
Queen Charlotte Sound (QCS) is a broad shelf region off Canada's west coast that is highly biologically productive and hosts several Marine Protected Areas. However, ecosystems in QCS are becoming increasingly susceptible to climate change…
View article: A New Method of Determining Glass Sponge Reef Adaptive Management Zones for the Hecate Strait and Queen Charlotte Sound Marine Protected Area
A New Method of Determining Glass Sponge Reef Adaptive Management Zones for the Hecate Strait and Queen Charlotte Sound Marine Protected Area Open
The world’s largest living glass sponge reefs, located in the Hecate Strait and Queen Charlotte Sound off British Columbia, are impacted by bottom contact fishing gear. The existing Adaptive Management Zones (AMZs) for the protection of th…
View article: Wind‐Driven Currents in a “Wide” Narrow Channel, With Application to Douglas Channel, BC
Wind‐Driven Currents in a “Wide” Narrow Channel, With Application to Douglas Channel, BC Open
This paper applies a structured grid, 3‐Dimensional Regional Ocean Modeling System to examine wind‐driven currents of an idealized stratified channel, representative of Douglas Channel, British Columbia, Canada, where the increased marine …
View article: HF Radar Observations of Wintertime Surface Currents Over Hecate Strait, British Columbia
HF Radar Observations of Wintertime Surface Currents Over Hecate Strait, British Columbia Open
An oceanographic high-frequency radar system was deployed by Fisheries and Ocean Canada along Hecate Strait, British Columbia to strengthen regional marine safety, including search-and-rescue operations. The Hecate Strait CODAR system prov…
View article: Tidal Dispersion and its Influences on the Trajectories of Spilled Oil in Burrard Inlet
Tidal Dispersion and its Influences on the Trajectories of Spilled Oil in Burrard Inlet Open
View article: A Fuzzy-Based Framework for Assessing Uncertainty in Drift Prediction Using Observed Currents and Winds
A Fuzzy-Based Framework for Assessing Uncertainty in Drift Prediction Using Observed Currents and Winds Open
This paper proposes a fuzzy number—based framework for quantifying and propagating uncertainties through a model for the trajectories of objects drifting at the ocean surface. Various sources of uncertainty that should be considered are di…
View article: Correction to: Identification of a Seasonal Subsurface Oxygen Minimum in Rivers Inlet, British Columbia
Correction to: Identification of a Seasonal Subsurface Oxygen Minimum in Rivers Inlet, British Columbia Open
View article: Seabed disturbance and sediment mobility due to tidal current and waves on the continental shelves of Canada
Seabed disturbance and sediment mobility due to tidal current and waves on the continental shelves of Canada Open
Waves and tidal currents can interact to produce strong seabed shear stress and mobilization of sediments on continental shelves. Modelled wave and tidal current data for a 3-year period were used in a combined-flow sediment transport mode…
View article: Tidal mixing maintains regional differences in water properties and nutrient ratios in British Columbia coastal waters
Tidal mixing maintains regional differences in water properties and nutrient ratios in British Columbia coastal waters Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Journal of Geophysical Research - Oceans. ESSOAr is a venue for early communication or feedback before peer review. Data may be prelimin…
View article: The Blob and Queen Charlotte: Predicting Ocean Properties in an Upwelling System during Anomalous Conditions
The Blob and Queen Charlotte: Predicting Ocean Properties in an Upwelling System during Anomalous Conditions Open
Earth and Space Science Open Archive PosterOpen AccessYou are viewing the latest version by default [v1]The Blob and Queen Charlotte: Predicting Ocean Properties in an Upwelling System during Anomalous ConditionsAuthorsHayleyDosseriDStepha…
View article: Surface Drift and Dispersion in a Multiply Connected Fjord System
Surface Drift and Dispersion in a Multiply Connected Fjord System Open
The deployment of 206 surface drifters over 3 years in a fjord system in northern British Columbia allows examination of drift and dispersion in complex coastal regions on time scales up to 10 days. The surface drift is found to be seasona…
View article: Fate of diluted bitumen spilled in the coastal waters of British Columbia, Canada
Fate of diluted bitumen spilled in the coastal waters of British Columbia, Canada Open
View article: Lagrangian observations of estuarine residence times, dispersion, and trapping in the Salish Sea
Lagrangian observations of estuarine residence times, dispersion, and trapping in the Salish Sea Open
Estuaries are important mediators in the transport of freshwater, sediment, and dissolved material into the ocean, and many studies have investigated mean estuarine circulation. However, it is not clear how descriptions of the mean circula…
View article: A modeling study on tides in the Port of Vancouver
A modeling study on tides in the Port of Vancouver Open
In the present paper, tides in the port of Vancouver Harbour have been investigated with a high-resolution three-dimensional hydrodynamic model based on FVCOM (Finite Volume Community Ocean Model). The model was evaluated against field obs…
View article: Where else? Assessing zones of alternate ballast water exchange in the Canadian eastern Arctic
Where else? Assessing zones of alternate ballast water exchange in the Canadian eastern Arctic Open
Mid-ocean ballast water exchange (BWE) is recommended for international vessels to minimize the transfer of nonindigenous species (NIS). When this cannot be accomplished due to safety concerns, alternate ballast water exchange zones (ABWEZ…
View article: A Modeling Study on the Oil Spill of M/V Marathassa in Vancouver Harbour
A Modeling Study on the Oil Spill of M/V Marathassa in Vancouver Harbour Open
The M/V Marathassa oil spill occurred on 8 April 2015 in the English Bay. In the present study, the trajectory and the transport mechanism of the spilled oil have been studied by using the three-dimensional and particle-based Oil Spill Con…
View article: Subtidal circulation in a deep‐silled fjord: <scp>D</scp>ouglas <scp>C</scp>hannel, <scp>B</scp>ritish <scp>C</scp>olumbia
Subtidal circulation in a deep‐silled fjord: <span>D</span>ouglas <span>C</span>hannel, <span>B</span>ritish <span>C</span>olumbia Open
Douglas Channel, a deep fjord on the west coast of British Columbia, Canada, is the main waterway in the fjord system that connects the town of Kitimat to Queen Charlotte Sound and Hecate Strait. A 200 m depth sill divides Douglas Channel …
View article: Modelling seabed shear stress, sediment mobility, and sediment transport in the Bay of Fundy
Modelling seabed shear stress, sediment mobility, and sediment transport in the Bay of Fundy Open
Information about seabed stability and sediment dynamics is part of the fundamental geoscience knowledge required for the extraction of tidal energy in the Bay of Fundy and for the integrated management of the Bay. Waves, tidal currents, a…
View article: Managing Security in the Built Environment – A Review of Environmental Crime Prevention Strategies
Managing Security in the Built Environment – A Review of Environmental Crime Prevention Strategies Open
The practice of urban planning and building design largely follow traditional methods while transforming the structure and quality of life in the built environment. The process of managing cities requires updates and integration of new tec…