23-01-2023, 12:39 PM
Nothing new but the extent to which it is changing is very concerning. We now have atmospheric CO2 level at their highest level in over 800,000 years. From this study: https://royalsociety.org/topics-policy/p...uestion-7/
"For earlier geological times, CO2 concentrations and temperatures have been inferred from less direct methods. Those suggest that the concentration of CO2 last approached 400 ppm about 3 to 5 million years ago, a period when global average surface temperature is estimated to have been about 2 to 3.5°C higher than in the pre-industrial period. At 50 million years ago, CO2 may have reached 1000 ppm, and global average temperature was probably about 10°C warmer than today. Under those conditions, Earth had little ice, and sea level was at least 60 metres higher than current levels."
Also the correlation between CO2 levels and Antarctic temperature data sets it is worth noting that the temperature rise lags behind CO2 levels so we've probably got plenty of temerature increase already preloaded already, which of course equates to sea level rise still to occur.
"For earlier geological times, CO2 concentrations and temperatures have been inferred from less direct methods. Those suggest that the concentration of CO2 last approached 400 ppm about 3 to 5 million years ago, a period when global average surface temperature is estimated to have been about 2 to 3.5°C higher than in the pre-industrial period. At 50 million years ago, CO2 may have reached 1000 ppm, and global average temperature was probably about 10°C warmer than today. Under those conditions, Earth had little ice, and sea level was at least 60 metres higher than current levels."
Also the correlation between CO2 levels and Antarctic temperature data sets it is worth noting that the temperature rise lags behind CO2 levels so we've probably got plenty of temerature increase already preloaded already, which of course equates to sea level rise still to occur.