skookerasbil
Platinum Member
- Thread starter
- #561
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Did the cave men cause the climate to change and kill it?Is your mastodon as flippant as you are?
I don't know. They certainly hunted and ate them. Did they burn large areas of tundra as part of those hunts? Maybe so and that may have altered the local climate some.Did the cave men cause the climate to change and kill it?
Greg
Where all the CO2 come from, volcanic activity?Where else did the additional atmospheric gas come from during Jurassic??
LOL!!
The science isn't mattering...as I've been saying for 15 years in here...
2. Issues and the 2024 election
There are several types of evidence for glacial cycles, including:Vlostok has Co2 data, and it has isotope data, and calling isotope "temp" data is laughable.
And we know from the satellite and balloon data that Co2 does absolutely nothing...
Have you uneducated slobs upended the global scientific consensus yet?The science isn't mattering...as I've been saying for 15 years in here...
2. Issues and the 2024 election
Link?
There are several types of evidence for glacial cycles, including:
- Geological evidence
Glaciers leave behind geological evidence such as striations, which are scratches or grooves left by glaciers dragging rocks against bedrock. Other geological evidence includes glacial moraines, drumlins, valley cutting, and tillites, which are deposits of poorly sorted sediment that have turned to rock.
- Ice cores
Ice cores from Greenland contain chemicals that indicate the climate when the ice was formed.
- Rock deposits from the ocean floor
Rock deposits from the ocean floor contain chemicals that indicate the climate when the rocks were formed.
- Diatom fossils
The nitrogen isotopes in the silica shells of diatoms, which are floating algae that grow in Antarctic surface waters, vary with the amount of unused nitrogen in the surface water.
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Carbon dioxide in Earth's atmosphere - Wikipedia
en.wikipedia.org
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Jurassic - Wikipedia
en.wikipedia.org
During the Jurassic period, the primary source of carbon dioxide (CO2) in the atmosphere was volcanic activity; large-scale volcanic eruptions released significant amounts of CO2 into the air, contributing to the warmer climate of the Jurassic era compared to today.
Key points about CO2 during the Jurassic:
- High CO2 levels:
The Jurassic period is believed to have had significantly higher atmospheric CO2 concentrations than present, likely several times higher due to volcanic emissions.- Volcanic eruptions:
Massive volcanic eruptions, particularly from mid-ocean ridges and hotspots, were the main source of this CO2 release.- Organic decay:
Decomposition of large amounts of organic matter from plants and animals also contributed to CO2 levels, though volcanic activity is considered the dominant source.