Ahh so all the climate models that say 2c-2.5c or whatever? We are already 2c above where it should be with orbital forcing taken into account. Early humans did this doubling the methane. Remember too methane turns to co2 in atmospheric process.
These anthropogenic anomalies would produce a radiatively forced warming of about 0.8C globally for a global climatic sensitivity to a CO2 doubling of 2.5C. With positive albedo feedback at high latitudes, the warming should be about 2.5 times larger, or 2C. Based on energy-balance modeling, Williams reported that broad areas of high terrain in northeast Canada were within 1 C to 2 C of the glaciation limit during the Little Ice Age. Without the early anthropogenic warming of 2C, large parts of northeast Canada would have been cold enough for an ice sheet to grow. In summary, human additions of greenhouse gases to the atmosphere since 8000 to 5000 years ago have been large enough to stop a glaciation that would have been produced by natural trends of falling summer insolation and decreasing greenhouse gas concentrations.
https://meteor.geol.iastate.edu/classes/ge515/papers/Ruddiman-QuSciRev.03.pdf
https://bikeshed.party/notice/AZS9amSXdlIaFww9ey
SlicerDicer /
npub14n…gxf7n
2023-09-05 11:59:57
Author Public Key
npub14nhum7zztntjxx6mnzxzh8h9daepak9vwwlx2j6chjq3ltycmavq5gxf7nPublished at
2023-09-05 11:59:57Event JSON
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"content": "Ahh so all the climate models that say 2c-2.5c or whatever? We are already 2c above where it should be with orbital forcing taken into account. Early humans did this doubling the methane. Remember too methane turns to co2 in atmospheric process. \n\nThese anthropogenic anomalies would produce a radiatively forced warming of about 0.8C globally for a global climatic sensitivity to a CO2 doubling of 2.5C. With positive albedo feedback at high latitudes, the warming should be about 2.5 times larger, or 2C. Based on energy-balance modeling, Williams reported that broad areas of high terrain in northeast Canada were within 1 C to 2 C of the glaciation limit during the Little Ice Age. Without the early anthropogenic warming of 2C, large parts of northeast Canada would have been cold enough for an ice sheet to grow. In summary, human additions of greenhouse gases to the atmosphere since 8000 to 5000 years ago have been large enough to stop a glaciation that would have been produced by natural trends of falling summer insolation and decreasing greenhouse gas concentrations. \n\nhttps://meteor.geol.iastate.edu/classes/ge515/papers/Ruddiman-QuSciRev.03.pdf\n\nhttps://bikeshed.party/notice/AZS9amSXdlIaFww9ey",
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