by dissident » Sat 03 Feb 2018, 13:19:21
$this->bbcode_second_pass_quote('AdamB', 'B')ased on the age of this thread, I was surprised to see that this pole reversal thing has been going on more than a decade, and the Happy McDoomsters haven't latched onto it as their next great Rapture trigger?
Pole reversals don't have to happen in less than 10 years to be fast enough to damage human infrastructure. You are a one-note-Johnny Pollyanna on some sort of crusade to prove the doomers wrong. This makes you a similar waste of space.
In the above posts concerns have been raised about the Earth's atmosphere being stripped during pole reversals. This is sheer nonsense. The Earth has been subjected to these reversals on an going basis for billions of years. Given the size of the Earth, it is very difficult for CO2, CO (upper atmosphere breakdown product of CO2), O2 and N2 to be thermally ejected out of the gravitational well. The solar wind is not all that fast and the associated electrons and protons do not have large amounts of energy unless they are ejected by CME's and directly aimed at the Earth. In fact, the relativistic electrons that precipitate in the auroral belt zone of the magnetic polar caps are the result of resonance processes within the distorted magnetic field of the Earth.
We have experience with CME induced solar proton events and they result in ionization typically down to 30 km above the surface. Due to the presence of a magnetic field we get a concentration of these high energy protons in 60 degree caps centered on the magnetic poles. Without a magnetic field the ionization would be distributed pole to pole but burrowing down to 50 km above the surface. In both cases some lighter fraction of gases above 100 km get stripped away. There is nothing special about the presence of a magnetic field since it does not stop the penetration of these high energy protons. The background solar wind is just too weak do strip our atmosphere when the CME associated events fail to do so.
Mars is a different case since it has only 1/3 the gravity at the surface. This means that Mars can and did lose most of its atmosphere (CO2) via thermal ejection from its gravitational potential well. By the same token the solar wind can strip the outer atmosphere of Mars much more effectively than the Earth's atmosphere.
In terms of infrastructure damage, we do not need pole reversals to see CME impacts. The 1989 event was anomalous and saw ionization penetrate to 10 km above the surface at high latitudes. This induced enough magnetic force to bring down the Quebec electricity grid (due to massive over current conditions). Under weak magnetic field conditions such events can occur at lower latitudes. However, there is a large element of luck. If over the span of a few decades and centuries there are no outlier CME events (or perfectly aimed cases) then the Quebec style events will not happen. However, when it comes to satellites, pole reversal conditions will terminate all existing satellites. A whole new, shielded design approach will be required. This will make satellites much heavier and more expensive to launch. Considering how BAU is the most sacred thing for humanity, expect all satellites to be disabled before anything is done to address the problem.