NationStates Jolt Archive


An Analysis of the Atmospheres of Mars and Cytheria

imported_Eniqcir
11-06-2004, 05:04
A Report of the House Naphtaeli Terraformation Commission,
Presented here to the Martian Duma and those nations with interests in the Second Planet, Cytheria.

With Venus finally becoming marginally habitable, and the Martian terraforming project running into previosuly unforeseen political difficulty, it is important that potential colonists and, in the case of Mars especially, climatological engineers and policymakers have a clear understanding of the conditions on these worlds.

Our analysis of Mars will begin with the expected patterns resulting from natural phenomena only, and will not take into account the additional energy provided to specific areas by the Guilder solette or Eniqciri weather modification infrastructure. The relevant information on their effects can be accessed through the Kaseian Office of Climatalogical Engineering.

Mars's rotation is similar to Earth's, and Mars therefore has a similar number of circulation belts. The relatively recent ocean, geologically speaking, has smoothed out much of the altitude difference between hemispheres and raised the average altitude planetwide, but differences still exist. Because of the general downward slope towards the northern hemisphere, the Northern Ferrel Cell and Southern Hadley Cell are slightly decreased in size, generating turbulence at the intertropical convergence zones. Due to the general slope downards towards the east, winds in Lunae Planum are generally mild, as the prevailing ground currents must work uphill. To the north in Tempe Terra, however, prevailing ground currents in the Ferrel Cell flow downhill, generating higher than avergae winds blowing out across Oceanus Borealis and Mare Acidalia.
Rainshadows generate notable desert regions to the west of Yggdrasil, the Tharsis volcanoes, Neriedum and Chastitas Montes, Hellespontus Montes, Elysium Mons, and the artificial Daedalian range. The latter extends across Northern Sirenum into Eastern Cimmeria.
Due to the cold, dry climate to the south, and as the Southern Watershed Project has not yet reached completion, the only potential source of water for all but the very northern edge of Noachia Terra is Mare Hellas. As most of this is blocked by the Hellespontus Montes, however, Noachia is left as a cold desert, although it has occasionally been known to snow in the southeasternmost regions.

Venus's slow rotation make it possible to model the planet as a tidelocked world with only a few minor modifications. Currently, circulation is dominated by two gigantic convection cells nearly entirely contained within the main cloud layers. Hot air rises at the equator and flows north and south to the poles where cold air sinks and flows back to the equator. These Driving Cells power two sets of Secondary Cells, one above and one below the main cloud deck, which counter-rotate, flowing low towards the poles and high back towards the equator. Near the poles, the Lower Secondary Cells and Driving Cells are replaced by a single set of Polar Vortices which also counter-rotate, generating turbulence at the Upper Secondary Cell interface. The gap between Driving Cell and Polar Vortex produces a calm region, currently occupied by the Polar Ring Cloud. The entire upper atmosphere superrotates, shearing the circulation cells into the familiar chevrons.
As the cloud cover reduced and carbon removed from the atmosphere, the planet has been undergoing constant cooling. This release of heat into space has provided a second energy to drive atmospheric circulation recently, resulting in more powerful and turbulent patterns than seen in the past. Once the planet again reaches thermal equilibrium, the winds will reduce in power. Concurrently, the Lower Secondary Cells are expected to be replaced by a single complex supercell. Warm dayside air will flow at ground level over the equatorial terminators at average speeds of approximately 26 kph. These two currents will then cool at the nightside antipode and rotate ninety degrees to carry cold air across the poles to the dayside. The effects of Maxwell Montes as a windblock are still being determined.

~Lord Naphtaeli
Sunset
11-06-2004, 05:41
Very interesting - would a climate profile of the Vallis Marineris region be avaliable?
imported_Eniqcir
12-06-2004, 03:03
Climate Profile of Valles Marineras:
Humid subtropical by Earth standards. Within the Martian tropical region.
Average temperatures between 283K and 296K. Deep water stabilizes temperature through the day/night cycle, creating north/south winds away from the main channel during the day and towards the main channel during the night. Evaporation from the Valles and from the Gulf of Chryse contribute to the regions relatively high humidity. Rainfall is roughly evenly distributed year-round, with an average of approximately 150 centimeters of precipitation per year.
(More details to come as I have more time to think on and research this.)
Muktar
12-06-2004, 03:06
OOC: Did you consider the fact that Mars is much smaller than Terra, and it's gravity cannot hold down oxygen? Unless you launched a massive project to bombard Mars with a good chunk of the asteroid belt, it ain't happening. Once you do that, oxygen will begin to build up, creating an ozone layer, holding in Earth levels of heat. Of course, after the bombardment, it wouldn't be a red planet, now would it?
Sunset
12-06-2004, 03:14
OOC: Mars has been in the terraforming process since around January, 2003. More than 500 years have passed in the Sunset timeline since that point.
imported_Eniqcir
12-06-2004, 03:17
OOC: Did you consider the fact that Mars is much smaller than Terra, and it's gravity cannot hold down oxygen? Unless you launched a massive project to bombard Mars with a good chunk of the asteroid belt, it ain't happening. Once you do that, oxygen will begin to build up, creating an ozone layer, holding in Earth levels of heat. Of course, after the bombardment, it wouldn't be a red planet, now would it?Also OOC:
First off, the ozone layer doesn't significantly contribute to the greenhouse effect.
Second, Mars's gravity is perfectly sufficient for holding down oxygen- just not as much as Earth does at equal temperature. Keep it cold, and you might be able to push all the way up to a bar. But that's not gonna happen. It'll either be temperate and thin, but still breathable, or warm and thick with CO2.
Eniqcir
14-07-2004, 16:32
*Bump*
Menelmacar
14-07-2004, 23:15
I'm fairly sure you're basing this off the odd and quite ridiculous idea of moving atmosphere from one planet to the other, so regrettably (since you clearly put a fair bit of work into it) it's gotta be ignored on my part.
Eniqcir
15-07-2004, 20:51
Fortunately, you're dead wrong. The first half of the Venus paragraph is based on real-life observational data, and the rest is based on models that only care about instantaneous conditions, not how they got that way. No matter the method used, whether gas is carted away or locked up in carbonates or something completely different, if you remove the cloud cover from Venus, that's what'll happen. The same goes for Mars- heat it & thicken the atmosphere, and you'll get what's described, no matter how you do it.

Still, I have yet to see any convincing argument as to why transfer of atmosphere is "ridiculous". It'll just take an insanely long time.
Eniqcir
15-07-2004, 22:34
YARG! Where be edit button?
That should say "reduce temperature and cloud cover on" rather than simply "remove cloud cover from", as one would want to retain some cloud cover to assist in said reduction of temperature.
Crimmond
16-07-2004, 11:07
I'm fairly sure you're basing this off the odd and quite ridiculous idea of moving atmosphere from one planet to the otherOOC: Woah woah woah...

Wasn't that your idea? Or at least had your backing?

I'll admit I've pretty much left the solar system alone while I deal with subjegating Europe, but I know I saw quotes from you saying that Menelmacari ships were hauling gas from Venus to Mars.
Tsaraine
16-07-2004, 12:02
OOC: I don't see any reason why atmosphere transfer would be impossible. It would, however, be ludicrously unfeasible, unless you used wormholes or some such. But then Eniqcir has never seemed particularly deterred by feasibility. *cough*movingMars*cough*
Eniqcir
16-07-2004, 14:23
OOC: I don't see any reason why atmosphere transfer would be impossible. It would, however, be ludicrously unfeasible, unless you used wormholes or some such. But then Eniqcir has never seemed particularly deterred by feasibility. *cough*movingMars*cough*Correction: Eniqcir has never been deterred by mere mortals petty opinions of feasibility. On a long enough time-scale, every Eniqciri project is perfectly feasible. How do I know this? Because Math Lies Not!