Actually a newer “version” by the same chemist who's text was just copy pasted by that Ing. (i.e. Engineer) guy (who names that copy-pasting “A small Tribute”)
That (the newer one, from your link) was published by: “Chemical innovation 30 (12), 50-55, 2000”
Compare with the peer reviewed, not confirming "many times higher pressure" claim:
"We show from the analysis of nitrogen and argon isotopes in fluid inclusions trapped in 3.0- to 3.5-billion-year-old hydrothermal quartz that the partial pressure of N2 of the Archean atmosphere was lower than 1.1 bar, possibly as low as 0.5 bar, and had a nitrogen isotopic composition comparable to the present-day one. These results imply that dinitrogen did not play a significant role in the thermal budget of the ancient Earth and that the Archean partial pressure of CO2 was probably lower than 0.7 bar."
There is sure possibility that the pressure changed through the times, but not alk “proofs” are real proofs.
That (the newer one, from your link) was published by: “Chemical innovation 30 (12), 50-55, 2000”
Compare with the peer reviewed, not confirming "many times higher pressure" claim:
http://science.sciencemag.org/content/342/6154/101
"We show from the analysis of nitrogen and argon isotopes in fluid inclusions trapped in 3.0- to 3.5-billion-year-old hydrothermal quartz that the partial pressure of N2 of the Archean atmosphere was lower than 1.1 bar, possibly as low as 0.5 bar, and had a nitrogen isotopic composition comparable to the present-day one. These results imply that dinitrogen did not play a significant role in the thermal budget of the ancient Earth and that the Archean partial pressure of CO2 was probably lower than 0.7 bar."
There is sure possibility that the pressure changed through the times, but not alk “proofs” are real proofs.