General Category > Climate/Environment
Sea Level Rise Hoax Exposed: The Disappearing Islands That Refuse To Disappear
Smokin Joe:
--- Quote from: Free Vulcan on October 07, 2025, 12:17:53 pm ---The more geology and tectonic knowledgeable here can educate me, but the whole 'sea level rise' claim is a two way street that can either be due to actual rising water, or sinking land masses.
Like most material substances, heating or cooling can cause expansion or contraction of that substance, so it would seem on a planetary scale the same thing would apply. Less solar energy, the Earth contracts, more and it expands.
Maybe that's bull doody because it's too simple, but if true you notice they never even try to conceive it, because everything must be steered to global warming.
--- End quote ---
In a way, warming has created what seems to be expansion. Think of the continents as lighter rock floating on the highly viscous Mantle. When the Laurentide Glaciation ice sheets melted off, a tremendous weight was removed from the Continents, which went into Isostatic Rebound--that is they floated higher on the mantle, like a barge would after its cargo had been removed. Sea level rose faster, because of the tremendous amount of ice that melted.
No small amount of fracturing of crystalline (deep igneous rock like granite) rock has occurred in areas that were under the ice sheet (like the Canadian Shield).
On the other hand, rocks like granite are pretty stable dimensionally, at least at temperatures we would consider survivable for life.
Free Vulcan:
--- Quote from: Smokin Joe on October 07, 2025, 12:30:09 pm ---In a way, warming has created what seems to be expansion. Think of the continents as lighter rock floating on the highly viscous Mantle. When the Laurentide Glaciation ice sheets melted off, a tremendous weight was removed from the Continents, which went into Isostatic Rebound--that is they floated higher on the mantle, like a barge would after its cargo had been removed. Sea level rose faster, because of the tremendous amount of ice that melted.
No small amount of fracturing of crystalline (deep igneous rock like granite) rock has occurred in areas that were under the ice sheet (like the Canadian Shield).
On the other hand, rocks like granite are pretty stable dimensionally, at least at temperatures we would consider survivable for life.
--- End quote ---
I wonder if they've even tried to measure it. Probably not because they can sensationalize it for the agenda.
With such large land masses a contraction or expansion due to natural heating or cooling of the Earth might mean significant water rising or lowering might have big effects coastal areas but be really small in the big picture.
Smokin Joe:
--- Quote from: Free Vulcan on October 07, 2025, 12:42:00 pm ---I wonder if they've even tried to measure it. Probably not because they can sensationalize it for the agenda.
With such large land masses a contraction or expansion due to natural heating or cooling of the Earth might mean significant water rising or lowering might have big effects coastal areas but be really small in the big picture.
--- End quote ---
Isostatic rebound is ongoing, and varies, depending on the thickness of the continental plate at any given location, and the amount of ice that was on it. The Central Canadian Shield, for instance had some 4 kilometers (about 2 1/2 miles thick) of ice piled on top of it. and has risen some 5,000 ft. in places (It's still rising). Areas near the edges of the continental plate have risen less, because the rock is thinner (so it 'floats' lower on the mantle) and the ice sheets were thinner there or partly supported by floating on the ocean. Lots of variables.
Free Vulcan:
--- Quote from: Smokin Joe on October 07, 2025, 12:48:24 pm ---Isostatic rebound is ongoing, and varies, depending on the thickness of the continental plate at any given location, and the amount of ice that was on it. The Central Canadian Shield, for instance had some 4 kilometers (about 2 1/2 miles thick) of ice piled on top of it. and has risen some 5,000 ft. in places (It's still rising). Areas near the edges of the continental plate have risen less, because the rock is thinner (so it 'floats' lower on the mantle) and the ice sheets were thinner there or partly supported by floating on the ocean. Lots of variables.
--- End quote ---
Would natural heating and cooling of the Sun have an effect on expansion and contraction of land masses? Enough to be measured at least.
Smokin Joe:
--- Quote from: Free Vulcan on October 07, 2025, 12:52:53 pm ---Would natural heating and cooling of the Sun have an effect on expansion and contraction of land masses? Enough to be measured at least.
--- End quote ---
I can't answer that one. Too many variables, including foliage, surface sediments which would shift independently of underlying rock and provide insulation, reflection from and cooling by evaporation of bodies of water, and the albedo (reflectivity) of the surface.
That said, it is likely there would be some expansion, but considering granite (for instance) would expand by a factor of 0.000043 to 0.000065 per degree celsius, it would be fairly small. A one thousand mile (5,280,000 ft.) block of granite, evenly heated one degree C would expand between 227 and 342 feet, depending on the mineral content.
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