Post reply

Warning: this topic has not been posted in for at least 120 days.
Unless you're sure you want to reply, please consider starting a new topic.

Note: this post will not display until it's been approved by a moderator.

Name:
Email:
Subject:
Message icon:

shortcuts: hit alt+s to submit/post or alt+p to preview

Please read the rules before you post!


Topic Summary

Posted by: Girlinhat
« on: November 18, 2011, 01:57:23 PM »

My terraforming procedure is rather simple.  A "megaformer" class ship with an OH and 50-100 terraforming modules, towed in by a special tug.  Once there, raise oxygen to acceptable limits (usually ideal for the species, venetian paradise style), then remove any toxic gasses, then add safe greenhouse or anti-greenhouse as needed to adjust temperature.  This is usually done by-hand, adding or removing and watching the temperature ranges from one month to another and tweaking from there.  Very imprecise as far as stellar manipulation goes, but it works.
Posted by: Person012345
« on: November 17, 2011, 03:47:40 PM »

Oxygen is toxic at high pressures, yes, but I wasn't sure that the pressure of CO2 affected it's toxicity particularly. Provided the percentage was acceptable. I could be wrong though.
Posted by: Yonder
« on: November 17, 2011, 01:56:00 PM »

Quote from: Person012345 on November 17, 2011, 01:11:55 PM
Are you sure it's to do with pressure? I thought Carbon Dioxide was deadly in high concentrations (rather than pressures) because it prevents adequate diffusion of oxygen from and carbon dioxide into the blood stream. Deadly at about 4%.
You are totally right about CO2 being poisonous earlier than I thought, after some looking it looks like the difference is about split between what we each thought. Symptoms start setting in at a bit before 3%, and progress in seriousness, at 8% loss of consciousness is imminent.

Pretty much all gases work off of partial pressure as far as their affects on... well, really anything. The 10% to 30% Oxygen thing in this game isn't realistic. The Apollo and Mercury astronauts were perfectly fine with 100% oxygen, because the pressure was low enough that the partial pressures were about right. Likewise I remember that during Apollo 13 the CO2 got to around 13%, which would have killed them at 1 atm, but they were alright at the .5 atm of the Apollo. For a chart showing the acceptable region oxygen percentiles at various pressures, and examples of where different spacecraft/stations fell you can go here:
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20080032549_2008032394.pdf
The picture is on page 4 of the report, which is page 12 of the PDF. Note that that green line denoting "perfect conditions" follows almost exactly along the ".22 atm partial pressure oxygen" line.
Posted by: Person012345
« on: November 17, 2011, 01:11:55 PM »

Quote from: Yonder on November 14, 2011, 01:23:44 PM
:D I'm even more anal. I add Carbon Dioxide up to .1 atms, that's a lot more than we have on Earth, so any plants will be fine, but I don't go up any higher than that because you start getting into the human-lethal range (not in game, in real life) so after putting in .1 atm CO2 I switch over to "Safe Greenhouse Gas" if I still need more heat.
Are you sure it's to do with pressure? I thought Carbon Dioxide was deadly in high concentrations (rather than pressures) because it prevents adequate diffusion of oxygen from and carbon dioxide into the blood stream. Deadly at about 4%.
Posted by: Yonder
« on: November 14, 2011, 01:23:44 PM »

Quote from: TheDeadlyShoe on November 14, 2011, 12:52:22 PM
I like to use Carbon Dioxide instead of the "Safe" gas... xD

A little bit less handwavium, and apparently it doesnt kill people. Oo

:D I'm even more anal. I add Carbon Dioxide up to .1 atms, that's a lot more than we have on Earth, so any plants will be fine, but I don't go up any higher than that because you start getting into the human-lethal range (not in game, in real life) so after putting in .1 atm CO2 I switch over to "Safe Greenhouse Gas" if I still need more heat.
Posted by: zazu
« on: November 14, 2011, 01:08:50 PM »

Woo, there

Finally I can expand this mineral-rich planet! :D

Thanks for all the help guys!
Posted by: TheDeadlyShoe
« on: November 14, 2011, 12:52:22 PM »

I like to use Carbon Dioxide instead of the "Safe" gas... xD

A little bit less handwavium, and apparently it doesnt kill people. Oo
Posted by: blue emu
« on: November 14, 2011, 12:01:17 AM »

Quote from: zazu on November 13, 2011, 11:55:26 PM
Thanks Blue Emu

Think I'm heading into the right direction now.

Btw... do you happen to also be on the Paradox forums? I remember seeing a "Emu" there but it might just be a coincidence :)

That's me, yes... I'm a Moderator on the Paradox board. We play "community" Aurora games in the Off Topic - Forum Games section.

My Ad Astra campaign can be found half-way down this page:

http://forum.paradoxplaza.com/forum/forumdisplay.php?419-OT-Forum-Games
Posted by: zazu
« on: November 13, 2011, 11:55:26 PM »

Thanks Blue Emu

Think I'm heading into the right direction now.

Btw... do you happen to also be on the Paradox forums? I remember seeing a "Emu" there but it might just be a coincidence :)
Posted by: blue emu
« on: November 13, 2011, 10:39:26 PM »

Just add another gas to dilute the Oxygen concentration.

If it's still a bit chilly, add "Safe Greenhouse Gas". If the high Oxygen levels are the only problem, add something harmless like Nitrogen.
Posted by: zazu
« on: November 13, 2011, 10:26:24 PM »

Ah, it says it has no breathable atmosphere

Also, it says something about being above 30% oxygen

But how can I get a breathable atmosphere if I have to lower oxygen levels?
Posted by: blue emu
« on: November 13, 2011, 09:54:07 PM »

Big yellow sun button in the center of the top row on the main window.
Posted by: zazu
« on: November 13, 2011, 09:21:12 PM »

Where can I find System Information?
Posted by: TheDeadlyShoe
« on: November 13, 2011, 06:01:48 PM »

If you look at the planet in the System Information panel, you can see what specific factors are causing a colony cost problem. Oxygen 30% will be noted here, as will the temperature multiplier or the presence of noxious gases or an unbreathable atmosphere.
Posted by: Vanigo
« on: November 13, 2011, 05:18:19 PM »

There's a very badly-explained thing where if the atmosphere is more than 30% oxygen the colony cost is 2.0 as if the air was unbreathable. Is this the case here?