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An Earth w/o magnetosphere, w/o moon is simply a much larger Mars.
Give or take a thousand years, and we're either toast and/or we're becoming Mars like. We're deep into achieving our point of no return, of the ongoing GW thawing process of losing our surface ice caps, while all of that nifty Mars sequestered ice isn't going anywhere without a good enough moon for keeping that planetology core and of a surface of interactive tidal forced environment(s) alive and kicking, as is very much the case for mother Earth. Pat Flannery: "Subject: Very wet Mars?" As in thirty-plus feet deep water over its entire surface if melted? http://www.spaceflightnow.com/news/n0703/15marsice/ Mars polar aquafur/aquifer ice is certainly worth our knowing about, as it represents the grim remainder of what obviously used to be a geothermally active and only somewhat atmospheric protected planet before having lost it's essential magnetosphere. Even if we're talking 1% Earth wet, Mars is missing most of its salt. All the water upon Earth and within it's wet atmosphere might represent as much as 9,000'(2.743 km) as covering a smooth orb. Thus 30+'(9.15 m) in depth of covering such a wussy little orb as Mars is hardly worth a good spit. At that near vacuum, what would the rate of evaporation be? Would there be any salty remainders? Perhaps Mars was a mostly a swamp and/or of some other geothermally forced muck like fresh water planet, whereas otherwise the necessary quantity of Mars salt simply doesn't seem to coexist, as though it had been nearly entirely missed upon getting its fair share of salt to begin with, or perhaps as having subsequently been strip-mined or somehow otherwise having its salt extracted. Is there yet an unknown atmospheric process of having extracted salt from such a cold and dry environment? (I don't think so) If whatever deposited such massive amounts of rock salt and ocean volumes of salty water upon Earth (roughly 1.5e19 kg of Na) should have happened at roughly the same time for the benefit of Mars, as then perhaps our Mars probes should have been operating fairly deep within the remainders of such Mars salt, of having at least 1.5e17 kg of whatever Na to deal with. Have those salty types of minerals and percentage or PPM worth of whatever's Martian rock salt been established from those robotic samples taken and processed thus far? Is salt too complicated of an element as to detect, much less quantify? Are there per chance any signs of Martian diatoms to behold? Other than going by way of various observational derived speculations, as to our having interpreted upon what sort of looks as though it's of a Mars salt like substance, it seems as though our very own reactive moon with its argon and sodium atmosphere has offered more solids of salt to behold than Mars. What gives? As I've said before, there's little argument from myself that Mars once upon a geothermally forced time had surface water, and that it still does have a wee bit of local or deposited salt, though as of thus far it's simply not indicating as having near enough (Na) volume or bulk as to hardly matter, especially if such salt(s) had been once upon a time made wet enough as for sustaining other significant life (meaning intelligent, as to being of something more worthy than mere microbes and/or diatom like spores). If Mars once offered as little as 1% the surface volumes of water as Earth, whereas such there should have been those remainders of its global salt (say at least 1% of our 1.5e19 kg = 1.5e17 kg), and thereby even that scant 1% worth of our terrestrial salt is what actually represents quite a great deal of salt to have kept hidden on Mars. What I'm otherwise driving at, is simply pondering the research based notions, that Mars is much older than Earth, and that Earth is much older than Venus, and that our somewhat recent moon (as having arrived since the last ice age) that's so much bigger and nearby than most seems a whole lot more salty than Mars, almost as though this solar system was assembled over a great period of time, as we've been dragged along by the likes of the Sirius star/solar system, and of likely having received a few items from its vast Oort cloud of icy moons and planet sized debris. At least our somewhat salty moon, as being so massive and nearby, is what's more than making up for the ongoing loss of Earth's core energy that's supposedly somewhere in the range of shedding 78 mw/m2, whereas our moon's gravity of tidal forced influence has been so much so helping that it has become by far our primary GW consideration like none other. Obviously adding our global dimming soot into the ongoing GW demise of our frail environment that's also losing its portective magnetosphere at the daunting rate of -.05%/year isn't exactly helping, at least not any more so than our artificial methods of having been evaporating water that's only adding to our atmospheric cache of having to hold said water vapor, which currently ranges anywhere from 13e12 tonnes to as much as 150e12 tonnes, depending entirely upon whichever hocus-pocus or conditional physics driven science you'd care to take to the bank. It's as though we don't hardly know of or much less appreciate our very own Earth, yet having spent countless billions upon billions, while having essentially invested decades of our very best talents and resources upon going after whatever's further away than Venus seems almost sadistic, if not insane. - Brad Guth |
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