RE: [Precolumbian_Inscriptions] Re: Oxygen level over 30% ?
Hi Luis, hi everybody,
Yes you are right, there are lifeforms living at an ambient pressure of over 500 bar = 5000 metres under the sea, and when the latest news are correct then we cam find lifeforms even in Mariana Trench at over 1000bar.
However, the lifeforms look very peculiar to us and there is little known about their evolutionary state. I expect that the new Mars Mission findings of water and life forms will bring a little more light into this issue – provided that the findings are not “tailored”, just to please some institution or politician.
Well I don’t know the exact depths – or simulated depths in a pressure chamber – which have been reached so far. We were at 225 metres = 22.5bar under a mixed atmosphere of oxygen (0.22bar), nitrogen (0.44bar) and Helium (21.84bar) for over one hour, back in 1974 in an experimental chamber. ( It took us almost a week to get out from this chamber, by careful decompression. Not a nice experience at all!
In offshore business divers are living under condition of saturation (of nitrogen and helium) over 200metres = 20 bar for almost a month, but since it is confined within pressure chambers, which they only leave in pressurized diving bells (chambers), it is a very hard job.
Anyway, I presume that after a certain time of acclimatisation humans could live under these conditions, provided the oxygen level (partial pressure) of around 0.2bar is maintained.
671 24 68, 665 2683, 760 72 80 cell
From: luis_browne [mailto:luis_browne@...]
Sent: Monday, February 28, 2005 3:40 PM
Subject: [Precolumbian_Inscriptions] Re: Oxygen level over 30% ?
I see your point now. Thanks for the clarification. CO2, SO2 and O2
can all be displaced from the atmosphere and "fixed" in rock and
But don't many lifeforms in the ocean withstand a far greater
difference in ambient pressure?
How many atmospheres of pressure can humans accomdate without difficulty?
--- In Precolumbian_Inscriptions@yahoogroups.com , "Shankar's Auction
Service" <auction@r...> wrote:
> Hi Luis, hi everyone,
> Yes correct, it is quite unrealistic to assume that the nitrogen
> changed remarkably after the Proto-atmosphere has formed. The nitrogen
> balance is very stable, and nitrogen is not newly formed by any natural
> growing process on Earth, it is only circulating in various forms,
> total volume is stable and balanced.
> And yes, the extra oxygen would have created a higher atmospheric
> - But I do not know, what would have been the overall consequences
> on Earth.
> I do not even know for what we would have to search in order to find
> evidence, but if so, it must be there! What is it?
> Best regards
> Claus Oldag
> 671 24 68, 665 2683, 760 72 80 cell
> From: luis_browne [mailto:luis_browne@y...]
> Sent: Monday, February 28, 2005 2:54 PM
> To: Precolumbian_Inscriptions@yahoogroups.com
> Subject: [Precolumbian_Inscriptions] Re: Oxygen level over 30% ?
> --- In Precolumbian_Inscriptions@yahoogroups.com , "Shankar's Auction
> Service" <auction@r...> wrote:
> > existing situation and its consequences for research, if you agree!
> > If for instance the oxygen level was really 0.3 bar, then the
> > pressure was most probably not one bar, if however the atmospheric
> > was always around one bar, then the oxygen level cannot have been
> over 0.2
> > bar.
> Am I correct that you are saying that you believe the quantity of
> atmospheric nitrogen has not changed? Therefore, the "extra" oxygen
> would then have caused a total atmospheric presssure of greater than 1
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