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This map is the the flight domain of the Northern Royal Albatross Diomedea sanfordi . This green zone is very similar to that one which has been used for creating the list of possible Lifehavens. Because the range of this Albatross is derived from empirical observations of a bird species, it might well demonstrate an understanding of basic natural conditions which were not considered in my armchair peregrinations.

The main difference in these birds travels, from the Life-haven locations, is the inclusion of all of New Zealand, all of Tasmania, and all of the coasts of Chili and Argentina. Because, these birds live in the air, and rarely come down to the surface it means that there is a steady flow of air across the water. They use the resulting wind shear to generate lift, and thus these birds are able to stay in the air almost all the time. Thus this map may be a good one for finding good new Lifehaven sites, and eliminating some other potentially bad ones. The forces that created that wind pattern are probably the same ones which are going to create the winds which will carry the radioactive fallout south after a major atomic war. These world wide wind cell patterns are known as Hadley cells. It is the semi-isolation of the flow of radioactive air from the northern hemisphere atomic bombed targets across these cells to the southern hemisphere that makes the green zone possible. The antarctic zone south of the green zone isn’t really habitable without sustained support from the more temperate regions so I haven’t located many potential Lifehavens there.

Hadley cell cross section.

For example, half way between South Africa and Paraguay there is the island of Gough -40.323 -9.921 which might be okay, but the island of Tristan Da Cunha, -37.113 -12.288 only a little to the north, might not be. There is an Amsterdam Island -37.797 77.572 half way between Australia and Madagascar which is just outside of the green zone on this map which might mean this otherwise seemingly good site might not be such a good one after all. The photos of this island look grassy and bleak, and because of its remoteness, and its lack of military value it shouldn’t be a target, but it might get heavy fallout because of the winds. It is garrisoned by about 50 French people for weather observations or whatever, and some wild cattle. It might be a possible Lifehaven site if it were well dug in. But these particular albatross species which I have been following, in this post, seem to have excluded it for some reason other than fallout.