XPost: alt.global-warming, can.politics   
   From: kymhorsell@gmail.com   
      
   In alt.global-warming citizen winston smith  wrote:   
   > On 9/16/2024 2:08 PM, R Kym Horsell wrote:   
   >> citizen winston smith  wrote:   
   >>> On 9/16/2024 9:46 AM, N_Cook wrote:   
   >>>> Jan 2022 output was 515.25   
   >>> CO2 PPM during our most fecund geologic epochs was over 3,000 PPM,   
   >>> clownshow.   
   >> Just no mammals, right?   
   > Dead wrong!   
   ...   
   > We estimate CO2 concentrations of more than 2,000 p.p.m. for the late   
      
   ...   
      
   2000 is not 3000 clownshow.   
      
      
   --   
   Age (mn y)              atm CO2      ext rate      model-est   
                           (rel now)    %genera       ext rate   
   -10                       1.17933      2.06767      1.16133   
   -15                       1.30199      2.29323      2.00115   
   -27                       1.46844      5.58271      3.14078   
   -35                       1.75146      8.35734      5.07853   
   -47                       1.92988      7.98761      6.30012   
   -110                      2.04695      3.54135      7.10166   
   -94                       2.19502      8.88502      8.11545   
   -119                      2.39967      10.4165      9.51662   
   -150                      2.63641      9.79616      11.1375   
   -159                      2.81913      9.28572      12.3885   
   -162                      3.04563      4.82972      13.9393*   
   -166                      3.27991      5.91923      15.5434*   
   -249                      3.48535      16.5902      16.9499   
   -253                      3.64985      28.3083      18.0762*   
   -254                      3.77971      25.5551      18.9653*   
      
   y = 6.84669*x + -6.91318   
   beta in 6.84669 +- 2.93244  90% CI   
   P(beta>0.000000) = 0.999413   
   r2 = 0.568059   
   calculated Spearman corr = 0.742857   
   Critical Spearman = 0.623000 2-sided at 1%; reject H0:not_related   
      
      
   I.e. for each 280 ppmv extinction rate goes up 6.8+-2.9 pct points.   
   Changes in level of atm CO2 in paleo record explains 57% of ext rate   
   variations.   
      
   Extinction rates:   
   https://en.wikipedia.org/wiki/File:Extinction_intensity.svg   
      
   Atm CO2:   
   Atmospheric carbon dioxide levels for the last 500 million years   
   Daniel H. Rothman   
   PNAS April 2, 2002 99 (7) 4167-4171; https://doi.org/10.1073/pnas.022055499   
   Fig 4.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)