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The Deep Sea

neal.fun

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Re: The Deep Sea

#32

Post by Waterluvian »

I’m impressed by how the depth indicator remains accurate across devices. I have always struggled to get consistency out of CSS. Perhaps my own fault.

I’m amazed that anything biological can live 10km deep. What’s the trick to not having anything meaningfully organic get squished into a paste?

I’m also unsurprised by how “weird” stuff gets the deeper you go. But I’m very surprised by how there’s a few “normal” looking sharks super deep.

Re: The Deep Sea

#33

Post by holoduke »

gradys wrote: post #4

The most surprising thing to me was how deep mammals and even birds manage to get! The diving depths of emperor penguins, elephant seals, and narwhals are astonding.

I was surprised by the mentioning of the megamouth shark at 4200 meters. I thought they were at max 400m. Cannot find a proper source. But I find it hard to believe.

Re: The Deep Sea

#36

Post by coolspot »

Waterluvian wrote: post #32

I’m impressed by how the depth indicator remains accurate across devices. I have always struggled to get consistency out of CSS. Perhaps my own fault. I’m amazed that anything biological can live 10km deep. What’s the trick to not having anything meaningfully organic get squished into a paste? I’m also unsurprised by how “weird” stuff gets the deeper you go. But I’m very surprised by how there’s a few “normal” lookin…

> What’s the trick to not having anything meaningfully organic get squished into a paste?

Inner cell pressure == outer cell pressure

Re: The Deep Sea

#37

Post by sbierwagen »

>At 332 meters, this is the deepest any human has ever scuba dived. Set by Ahmed Gabr in 2014.

Yes. It took him 12 minutes to descend to depth... and 15 hours to ascend.

But if you take a look at the wikipedia article for deep diving you'll note there's a record for a "simulated" dive that's much deeper, 701 meters, done in 1992. Simulated how? Why was it never repeated? Well...

https://web.archive.org/web/20180127104927/http://gtuem.prae...

>Hydra 10 was performed in the Comex hydrogen hyperbaric facilities in Marseilles by three professional divers.

>The dive protocol included: 4 weeks of pre-dive period, 2 day of confinement at 10 msw, 13 days of compression to 675 msw, 3 days of bottom stage between 650 and 675 msw with an excursion dive at 701 msw, 24 days of decompression with 8 working dives in wet chamber.

How were the accommodations?

>A 35 m^3 cylinderical chamber (internal diameter: 2.3 m - length: 9.35 m) with living area and sleeping quarters and sanitaires.

Cozy. Spending 42 days in a steel can pooping a foot away from two new best friends must have been interesting. Did they have fun, at least?

>At 650 msw (6.6 MPa) and deeper, we particularly observed:

>- An increasing HPNS with: slight tremor, myoclonia, mysmetria which induced psychometric and intellectual performance decrease.

>- A dyskinesia associated to proprioception troubles with muscular weakness.

>- A decrease in appetites which required a change in the divers nutrition.

>- Sleep disturbance with decrease of deep sleep phases.

Re: The Deep Sea

#38

Post by blunte »

Nicely done, and very fascinating! Good thing the sea is not infinitely deep, or I’m not sure I could stop scrolling. “Just a couple more scrolls, what’s below this?”

Re: The Deep Sea

#39

Post by deanCommie »

sandworm101 wrote: post #30
ethbr0 wrote: post #20

The scrolling mechanic was great for communicating scale! The coolest thought this gave me, that I'd never really considered before: How little life must have changed in the past 3000 years in the deep ocean? Have we even been adjusting the atmosphere for long enough for the circulation currents to take pH changes that deep? We've essentially remade the surface of the planet, the lower atmosphere, and the top of the…

>> How little life must have changed in the past 3000 years in the deep ocean? Plastics. There are plastics down there, mostly fishing nets, that are making huge changes. And whales. There are far fewer whales alive today, and fewer dead whales sinking to the depths, which radically changes the amount of nutrients arriving on the bottom.

re: Whales: found this an incredibly illuminating read recently: The Enormous Hole That Whaling Left Behind from The Atlantic: https://www.theatlantic.com/science/archive/2021/11/whaling-...
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