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Sedna Expedition

Jul 15
0

Water Change in the Arctic

By | All Posts, Sedna Expedition, We Are Water | No Comments

How Climate Change Affects Water in the Arctic Right now the permafrost is changing fast in the Arctic and will likely shrink more than 10% in the next 20 years with the permafrost borders shifting up to 200 km northward. Where permafrost is present, the ground is frozen up to 500 m deep with only the top meter thawing in summer. That means that lakes, rivers and wetlands in the Arctic do not generally connect with the  groundwater. Surface water is abundant in summer offering breeding grounds for  fish, birds and mammals. That paradigm is changing fast. When surface water…

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Jul 14
0

Ice Diving Tips

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Regulators and Cold Water Regulator free-flows are one of the greatest hazards when diving under ice or in very cold water (less than 4°C). The condition is caused by the sudden drop in pressure as air passes from the cylinder through the first stage. When high pressure air passes through the first stage, it hyper-cools the metal moving parts. In a piston reg, small ice crystals can block the piston open, causing more air flow and trapping the piston open, creating a vicious feedback loop of more air, more ice and a runaway free flow. The air pressure overwhelms the downstream…

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Jul 13
0

Thermal Protection Under the Ice

By | Rebreather Diving, Sedna Expedition, Sidemount Diving, Underwater Photo and Video, Women Underwater | No Comments

The Santi Ladies First Suit   Reliable drysuits are critical for survival in cold water. Without proper exposure protection, one could expect to survive for less than 45 minutes in water near freezing. In less than 15 minutes, unconsciousness would be likely.   Santi Diving has outfitted the Sedna team with the first drysuits ever designed specifically for women. These “Ladies First” suits have many special features. The crotch has been recut and reinforcement for better leg motion and comfort. But beyond custom tailoring the suit offers many unique features. It has been redesigned from their unisex line with a…

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Jul 13
0

Canada is Water Wealthy

By | Sedna Expedition, We Are Water | No Comments

Canada’s water wealth is unequivocal. Water resources here represent about seven per cent of the world’s renewable freshwater reserves. That said, Canadians have gotten a little lazy. With the sense that freshwater reserves are endless, Canadians are one of the highest users of water per capita in the world. Access to safe, clean water is important for world security and conservation of resources will become ever more important in the future.  

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Jul 13
0

Sly Not Blue

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I got up at 4:30 as the sky was brightening. I wanted to explore the village in the early morning. It was extremely quiet, except for the many dogs I seemed to be awakening as I tramped through the town. One soggy pup was eager to make friend and bumped against my leg and jumped up on my hip with his wet paws encased in cold gravel. I met a lone fisherman on the dock and decided to share space with him. I did not want to invade his tranquility with a barrage of questions. The morning felt serene and…

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Jul 09
0

Meet Phantom

By | All Posts, Sedna Expedition, Underwater Photo and Video, We Are Water, Women Underwater | No Comments

Erika Bergman is our ROV Pilot (right). Today she tested her Open ROV “Phantom” in the pool to ensure it made it safely through transport. Charlene Barker (left) assisted with an extra set of hands. A small leak was caught and is being dealt with. Luckily Ocean Quest is also a spa and lots of hair dryers were available! Phantom will go for another swim and hopefully come up dry! Francoise Gervais (back) tested her new Santi suit and came up dry, so she is a happy diver. Susan and Emily are both busy with logistics and media. We’ll give a talk…

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