Good observation
Here are some data from the Vostok Ice Cores --- Vostok ice data
BP = before present.
" Depth, m - Yr BP - mean age-- Co2, ppmv
3120.61--- 324711 --322827--- 288.4
3123.51 ---325400-- 323485 ---298.7
3129.91--- 327237 --324991--- 285.8 "
Looks to me that the largest CO2 number that I noticed is an average of several hundred years.
The current 370 ppmv CO2 is 24 percent higher than an average of several hundred years --- seems to me that to get an average of 298.7 over several hundred years, some of the data had to be higher, --- and thus, much closer to current data.
Thanks!
Actually, that data is grouped in periods of about 1700 to 2300 years. I'm glad you see my point ;-) We would need to take our average C02 for the last 2000 years to make a comparison that is statistically valid, not the last ten years.