Spatiotemporal trends of polychlorinated biphenyls (PCBs) in surface and suspended sediments from the Lake Ontario Canadian nearshore 1994–2018: A fish consumption advisory perspective

Long, Tanya; Benoit, Nadine; Howell, E. Todd; Richman, Lisa A.; Bhavsar, Satyendra P.

doi:10.1016/j.jglr.2021.04.022

Cited by 10 publications

(1 citation statement)

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“…The number of upwelling events in 2018 were fewer in number (6) in comparison to 2013 (every 5-10 days for a total of 13 occurrences, not shown). Coincidentally, in 2018, there was a slight increase in some contaminant concentrations in suspended sediment from Index and Reference stations in the Golden Horseshoe [35]. While there could be many reasons for the contaminant increase, one could not overlook the fact that the lower activity in wind and upwelling events could have played a significant role in this increase.…”

Section: Temperaturementioning

confidence: 99%

Fine-Scale hydrodynamic modelling of Lake Ontario: Has climate change affected circulation patterns?

Hlevca,

Howell,

Madani

et al. 2024

Preprint

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The circulation in Lake Ontario is well known from past field and modelling studies. However, apparent changes in wind patterns, possibly due to climate change, have resulted in subtle changes in the currents’ formation that have implications for water resources and aquatic habitat. A high-resolution three-dimensional numerical model using the Danish Hydraulic Institute’s (DHI) MIKE 3 modelling framework based on a flexible mesh, was developed to describe lake-wide and coastal circulation features in 2018, which were then contrasted with past studies. The validated model effectively described lake-wide processes that include season-specific large gyres in the Rochester and Mississauga basins, and coastal currents along both northern and southern shorelines. During the isothermal season (non-stratified), a well-defined westward flow in the middle of the lake separates an anticyclonic (clockwise) gyre in the north, from the gyre and westward currents in the south. During the stratified season, key physical processes depicted in the model in the offshore and nearshore waters, including near-inertial waves (~17 h), upwelling events frequency (5–10 days), and surface seiches (~5 h) generally correspond with past studies. Upwelling events are the predominant northern nearshore physical processes, occurring during periods of south-westerly winds. Episodic Kelvin waves are mostly limited to the northern shore where wind direction and morphology can sustain them, and where cross-shore transport at the coastal boundary layer is minimal. The results, backed by field observations, suggest that predominant circulation patterns in the northern nearshore have changed in recent years during the stratified season.

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Section: Temperaturementioning

confidence: 99%