|
Title: What were the concentrations of atmospheric gases a few million years ago and today and maybe the future? Post by: JuliaH on Nov 1, 2012 I wanted to do some research on how plants act in different atmospheric conditions and wanted to try out the three different things which I thought would be a good basis. I wanted to do atmospheric conditions during the age of the dinosaurs (CO2 percentage, O2 percentage etc.) and the same for today and possible what it would be in the future. Can anyone tell me atmospheric conditions and gas percentages in the three time periods (I suppose past, present, and possibly future) please?
Title: What were the concentrations of atmospheric gases a few million years ago and today and maybe the future? Post by: tonya_c1977 on Nov 1, 2012 Nasa and NOAA would have that information
ancient atmosphere can be determined by sep ice cores to a few hundred thousand years and earth rock cores for millions of years atomic studies of tiny tiny amounts of trapped atoms can be counted and related to conditions at the time any to the Global warming studies have that information the charts are presented as CO2 concentrations O2 isotopes and estimated temperatures matched to geological ice age evidence |