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“The sea level rise that the [U.S. Geological Survey] has predicted is about 260 feet, or 80 meters. And so any of the maps made will be at that level or lower”
The coldest continent, Antarctica, became that way by progressively cooling over the past 37 million years, scientists have found.
Antarctica was once significantly warmer than today. Just prior to 40 million years ago, past studies found, the continent was home to diverse vegetation and experienced average temperatures between 30 and 51 degrees Fahrenheit (minus 1 and 10 degrees Celsius).
It is hotly debated as to why Antarctica then grew colder.
Drilling down
To help solve the mystery, scientists collected seismic data and drilled out tubes of sediment up to more than 100 feet (30 meters) long during two cruises in the northernmost Antarctic Peninsula area. The task wasn't always easy.
"You spend a lot of time lowering drill pipe to the seafloor only to have an iceberg approach and force you to pull pipe and move to another location," said researcher John Anderson, a marine geologist at Rice University. "As you can imagine, this was frustrating, but expected."
The researchers next reconstructed the region's climate and vegetation history by analyzing fossilized spores and pollen, marine organism remains, and sand and pebbles. Materials deposited in sediment are laid down in layers, and therefore can be pinned down to general points in time if these layers were not later disturbed.
They found that 37 million to 34 million years ago, reduced concentrations of atmospheric carbon dioxide coincided with increased mountain glacier formation. From 34 million to 23 million years ago, vegetation primarily consisted of woodlands and tundra dominated by conifers and southern beech. Limited pockets of this tundra were still present until 12.8 million years ago, with this long transition from a temperate alpine region to one of cold and ice continuing until nearly the present day.
www.livescience.com...
There is absolutely NOTHING we can do to stop the melting of the cold regions on our planet.
originally posted by: Fallingdown
a reply to: StoutBroux
There is absolutely NOTHING we can do to stop the melting of the cold regions on our planet.
Maybe evolution will give us gills by 2200 ? 🤔
originally posted by: Fallingdown
a reply to: Lumenari
If we give these people half of our paycheck then it won't happen at all.
That’s cheaper than the Democrats they want 60% .