A5056945874- Arctic and Antarctic ice dynamics
- Oceanographic and Atmospheric Processes
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Underwater Acoustics Research
- Marine and fisheries research
- Marine animal studies overview
- Marine and coastal ecosystems
- Winter Sports Injuries and Performance
- Data Analysis with R
- Climate change and permafrost
- Underwater Vehicles and Communication Systems
- Advanced Computational Techniques and Applications
- Methane Hydrates and Related Phenomena
- Ocean Acidification Effects and Responses
- Water Quality Monitoring Technologies
- Geological formations and processes
- Hydrological Forecasting Using AI
- Environmental Monitoring and Data Management
- Historical Geography and Cartography
- Business Law and Ethics
- Data Mining Algorithms and Applications
- Privacy, Security, and Data Protection
- Ionosphere and magnetosphere dynamics
- Climate variability and models
Bedford Institute of Oceanography
2016-2025
Fisheries and Oceans Canada
2017-2025
Dalhousie University
2021-2023
Woods Hole Oceanographic Institution
2015-2016
Institute of Oceanography
2016
Memorial University of Newfoundland
2007
Abstract Recent acceleration of Greenland's ocean‐terminating glaciers has substantially amplified the ice sheet's contribution to global sea level. Increased oceanic melting these tidewater is widely cited as likely trigger, and thought be highest within vigorous plumes driven by freshwater drainage from beneath glaciers. Yet larger part calving fronts outside remains largely unstudied. Here we combine ocean observations collected 100 m a glacier with numerical model show that unlike...
Discharge of surface-derived meltwater at the submerged base Greenland's marine-terminating glaciers creates subglacial discharge plumes that rise along glacier/ocean interface. These impact submarine melting, calving, and fjord circulation. Observations plume properties dynamics are challenging due to their proximity calving edge glaciers. Therefore, date information on these has been largely derived from models. Here we present temperature, salinity, velocity data collected in a surfaced...
Oceanographic field experiments often employ a suite of instrument types, each reporting data in different format.Many these formats are complex and difficult to decode.Manufacturers usually provide software for accessing produced by their instruments, but it is proprietary closed-source, making researchers analyse novel ways or combine from multiple instruments.The oce package (Kelley, Richards, & Layton, 2021) addresses such issues the R language 1 with functions that handle dozens...
Abstract The Lofoten basin of the Nordic Seas is recognized as a crucial component meridional overturning circulation in North Atlantic because large horizontal extent Water and winter surface buoyancy loss. In this study, hydrographic current measurements collected from mooring deployed July 2010 to September 2012 are used describe water mass transformation mesoscale eddy field. Winter mixed layer depths (MLDs) observed reach approximately 400 m, with larger MLDs denser properties resulting...
Abstract. The frontal flux balance of a medium-sized tidewater glacier in western Greenland the summer is assessed by quantifying individual components (ice flux, retreat, calving, and submarine melting) through combination data models. Ice retreat are obtained from satellite data. Submarine melting derived using high-resolution ocean model informed near-ice observations, calving estimated record events along ice front. All terms exhibit large spatial variability ∼5 km wide It found that...
The Arctic has been a refuge from anthropogenic underwater noise; however, climate change caused summer sea ice to diminish, allowing for unprecedented access and the potential increased noise. Baseline sound levels must be quantified monitor future changes manage noise in Arctic. We analyzed 39 passive acoustic datasets collected throughout Canadian 2014 2019 using statistical models examine spatial temporal trends daily mean pressure (SPL) quantify environmental drivers of SPL. SPL...
Abstract Sediment transported to fjords is redistributed by turbidity currents and sometimes fails on steep sidewall slopes, forming marine geohazards that are known impact infrastructure. Since poorly understood in Arctic Fjords due lack of data monitoring, a comprehensive study Southwind Fjord, Baffin Island, was undertaken assess the modern processes leading their products seabed. Repeat measurements bathymetric changes flow from moorings revealed with measured speeds up 1.75 ms −1 lead...
Abstract. Oceanic primary production forms the basis of marine food web and provides a pathway for carbon sequestration. Despite its importance, spatial temporal variations are poorly observed, in large part because traditional measurement techniques laborious require presence ship. More efficient methods emerging that take advantage miniaturized sensors integrated into autonomous platforms such as gliders profiling floats. One method relies on determining diurnal cycle dissolved oxygen...
Abstract The static and dynamic performances of the RBR argo 3 are investigated using a combination laboratory-based in situ datasets from floats deployed as part an Argo pilot program. Temperature pressure measurements compare well to co-located reference data acquired shipboard CTDs. Static accuracy salinity is significantly improved 1) time lag for temperature, 2) quadratic dependence, 3) unit-based calibration each over its full range. Long-term deployments show no significant drift...
Ocean gliders are versatile tools for making ocean observations. This paper summarizes the experience, of nearly two decades, glider observing activity in Atlantic Canada. It reviews key considerations operating based on experience and lessons learned. has three main goals: 1. To provide new emerging users with guidance developing a program. 2. Review literature sensor development use gliders. 3. highlight different mission scenarios that include enough practical to support The is rapidly...
A simple laboratory experiment is designed to show the properties of internal solitary waves. The procedure and analysis are suited for a senior undergraduate course, though techniques described may also be used demonstration purposes in fluid mechanics course. measurements collected can compared weakly nonlinear Korteweg–deVries (KdV) theory wave shape, lengthscale-amplitude relationship, phase speed. provides good introduction waves ocean, along with an exploration error limits...
An R package named argoFloats has been developed to facilitate identifying, downloading, caching, and analyzing oceanographic data collected by Argo profiling floats. The analysis phase benefits from close connections between the oce package, which is likely be familiar those who already use for of other kinds. This paper outlines how accomplish some everyday tasks that are particular data, ranging downloading finding subsets handling quality control producing a variety diagnostic plots....
Oceanographic monitoring in the Arctic is important for understanding physical, chemical, and biological environments, particularly given enhanced warming of high latitude regions compared with global average. Ongoing situ Barrow Strait, Northwest Passage, by Fisheries Oceans Canada scientists at Bedford Institute Oceanography have established a baseline physical environment that has been used assessing ocean freshwater export, role sea-ice freeze-up break-up on ecosystem dynamics,...
The main sources of noise in the Arctic Ocean are naturally occurring, rather than related to human activities. Sustained acoustic monitoring at high latitudes provides quantitative measures changes sound field attributable evolving activity or shifting environmental conditions. A 12-month ambient time series (September 2018 August 2019) recorded and transmitted from a real-time station near Gascoyne Inlet, Nunavut is presented. During this time, levels band 16–6400 Hz ranged between 10 135...
Abstract This study demonstrates the long-term stability of salinity measurements from Argo floats equipped with inductive conductivity cells, which have extended float lifetimes as compared to electrode-type cells. New sensor payloads must meet demands governance committees before they are implemented globally. Currently, use CTDs cells designed and manufactured by RBR, Ltd., has been approved a Global Pilot. One requirement for new sensors is demonstrate stable over lifetime float. To...
Abstract. We investigate the frontal mass budget of a medium-sized tidewater glacier in western Greenland. This is done by comparing seasonal retreat to ice advection and ablation along front. Frontal partitioned into calving submarine melting, both which are estimated from situ observations. observe large spatial variability all terms In particular, we find that front characterized two main regimes: melting dominated versus dominated. While melting-dominated segments appear be associated...
In the Arctic, sound levels have historically been strongly tied to sea ice and wind speed, with very little impact of anthropogenic noise. However, climate change is causing a loss ice, consequently increased ship traffic underwater Here, we present first quantitative, comparative analysis across Canadian Arctic. We analyzed 39 passive acoustic datasets collected throughout Arctic from 2014 2019 examine spatial temporal trends in pressure (SPL), quantify environment drivers SPL, estimate...