Highly recommend taking a spin on the lake tomorrow in the sun. Walk off the beach at Snake Island onto the solid ice.

Frozen ships in -22°C in to Toronto harbour

Interesting mix of fluid dynamics and biology pubs.acs.org/doi/10.1021/...

The #HighSeasTreaty is now in force! unlocking the path to protect half our planet, the High Seas. 📢 Now’s the time for more countries to ratify and be part of the first #BBNJCOP. https://highseasalliance.org/treaty-ratification/a-wave-of-messages-for-the-high-seas/ #60toGlobal

Snow on the beach in Toronto

Thread: Each week I run a simulation of Australia’s main electricity grid using rescaled generation data to show that it can get very close to 100% renewable electricity with 24GW/120GWh of storage (5 hrs at av demand) Results: Last week: 100% RE Last 223 weeks: 98.6% RE (1/5)

A wild sculpture in Toronto made out of bike chains ⛓️ 🚲

The new delta of Don River is now visible on satellite maps!

Our new island is now showing up on Google Maps! (Ookwemin Minising island in Toronto)

The new TTC map is up - line 5 and 6 might actually be happening in Toronto? #TTC

Hydrology Paper of the Day @efdtoronto.bsky.social on how GPS trackers quantify the movement of plastic debris in Toronto Harbour on Lake Ontario: calculation of plastic drift velocities and paths; relationships with wind patterns and water current variabilities; and a geography of water circulation

Join us for an exciting session on physical limnology at the ASLO-SIL Joint Meeting, May 12–16, 2026, in Montréal, Canada www.aslo.org/aslo-sil-2026/ We are convening Special Session SS004: Physical Limnology—Dynamics, Drivers, and Change in Inland Waters. 🌊

The Halifax wave 🌊

Science communication sign in Halifax with pictures of secchi disk

Nibi =water Street sign to waters of Toronto

The horseshoe falls look like a massive wave cresting over and breaking with an incredible roar

New winter limnology paper out agupubs.onlinelibrary.wiley.com/doi/10.1029/... “How Ice Composition Controls Radiatively Driven Convection Under Lake Ice” 🌊 ❄️

New paper on winter limnology of Lake Ontario now out- “Unique thermal mixing patterns in Lake Ontario revealed by novel year-round observations of thermal stratification” Open access link at aslopubs.onlinelibrary.wiley.com/doi/full/10....

It’s October and the water is still warm at beach in Toronto with swimming still possible!

Hundreds of canoes ready to go

Large Algoma freight ship in Toronto

A salmon on Don River inToronto

New winter limnology paper “Enhancing winter climate simulations of the Great Lakes: insights from a new coupled lake–ice–atmosphere (CLIAv1) system on the importance of integrating 3D hydrodynamics with a regional climate model” gmd.copernicus.org/articles/18/...

Often September is warm for swimming, but right now the city is reporting 5 °C at the Toronto beaches due to an upwelling of cold water! www.openwaterdata.com/site/woodbin...

Large ship near Toronto harbour

A whole lot of buoys at RAEOn getting ready for field deployments

The Wetzel limnology videos by SIL are a great resource for teaching limnology.org/resources/we...

New park at mouth of Don River open, now possible to kayak around Villers island.

Come join the MU Limnology Lab as the new field manager! To apply for this position, please visit the MU web site at hrs.missouri.edu/find-a-job/s... and look for job opening ID 56749.

The Physical Processes in Natural waters (PPNW) meeting was a great success, with ~70 excellent talks and posters.

New winter limnology paper out doi.org/10.1073/pnas...

Preparing mooring lines to measure the movements of thermocline in lake Simcoe

Lake current monitoring system at Harris water treatment plant in Toronto

“Investing in Great Lakes Science is critical for safety and prosperity” www.sciencedirect.com/science/arti...

New paper on plastic waste in Toronto Harbour. "Wind driven transport of macroplastic debris in a large urban harbour measured by GPS-tracked drifters Open Access link = www.sciencedirect.com/science/arti... The video below shows the pathways that floating plastics were driven by the wind.

With the UN Ocean Conference #UNOC3 in its final days, it's worth watching again the Keynote talks of its #OneOceanScienceCongress. They provide an excellent overview of the issues faced by the ocean, including #fisheries, #carbon and #governance one-ocean-science-2025.org/programme/li...

Instrument recovered after long winter- hopefully it recorded ice thickness and water currents!

These Toronto public beaches are open for swimming

Red sun at dawn - the smoke from the prairie fires had reached Toronto

Winter thermal structure across the Laurentian Great Lakes #GreatLakes 🧪 www.sciencedirect.com/science/arti...

Our under-ice buoy was successfully recovered from a long deployment in lake Simcoe- soon we’ll know how changes in ice thickness influenced the phytoplankton and dissolved oxygen levels last winter! ❄️🧊🌊

A picture from 1960s of drouges used to measure water currents in Lake Ontario.

"Consumption of [invasive] rainbow smelt can cause heart problems and thiamine deficiency in trout. ...Lake trout were previously around five feet in length. Now, the fish are usually no longer than two feet. " www.thecooldown.com/outdoors/inv...

"Goldfish Carassius auratus is a longstanding global invader that has entered a new phase in its invasion history, spreading into new geographical areas and reaching larger body sizes and abundances than previously recorded." academic.oup.com/fisheries/ad...

Where Is All the Plastic? How Microplastic Partitions across Environmental Compartments within a Large Pelagic In-Lake Mesocosm | Environmental Science & Technology pubs.acs.org/doi/10.1021/...

A new study in FACETS (@cdnsciencepub.bsky.social), from authors including Chelsea M. Rochman (RSC College), explores whether #microplastics leach carbon into aquatic food webs. Learn more about their findings: bit.ly/3QlpQ0U 🏞️🐟

Happy 99th birthday to the man who gave voice to the wild. 🎉 Sir David Attenborough, thank you for a lifetime dedicated to the natural world, and for sharing its story with wisdom, wonder, and grace. You've inspired generations to fall in love with nature.