New Study Finds CO2 Reached 1980s-2000s Levels About 4,000 Years Ago In Japan
By Kenneth Richard on 23. November 2020
CO2 reached 1980s (352 ppm, average) to 2000s (380 ppm, max) levels 2500-5500 years ago in Japan per stomata records.
Scientists (Wang et al., 2020) have determined stomatal evidence can uncover large short-term CO2 fluxes of 50-100 ppm within a century or less.
Measurements from a forest near Mt. Kurikoma, Japan, reveal minimum to maximum CO2 values ranged between 288 ppm (minimum) to 383 ppm (maximum) between 3,903 to 3,795 cal. yr BP. The region’s sea surface temperatures were 1-2°C warmer (23-24°C) than today (22°C) from about 4,000 to 5,500 years ago.
https://notrickszone.com/2020/11/23/new-study-finds-co2-reached-1980s-2000s-levels-about-4000-years-ago-in-japan/
