posted on Dec, 4 2017 @ 01:46 PM
a reply to: ChesterJohn
Interesting idea, but seriously, to even get close to some kind of answer, you would need to consider the total surface area of this planet and its
albedo rates in all regions (and they vary widely), then obtain data on each and every satellite (as "space junk" items are also satellites, though I
fully understand what you mean by differentiating them; I'm just being picky picky picky).
You would need to know their altitude and surface area and even the shape and reflectivity rates of their surfaces to determine potential amounts of
reflection (albedo) or absorption of solar energy, spin rate (if any) to determine how much time they spend potentially deflecting sunlight away from
Earth versus the time they might be reflecting energy back towards Earth or its atmosphere. Then you'd need to factor in their relative orbital
altitudes and have algorithms to work out how much of the sun's energy they might be blocking (or how much energy from Earth they might be reflecting
back), both relative to absolute position above the planet and also in some cases if some are passing above/under others and negating their own
You could do all that, or you could just accept the fact that their total surface area is such a tiny fraction of our planet's total area, that the
overall effect they might have on global warming or cooling would probably be way less than what we get from eg semi-random densities of cloud cover.
I would suspect their combined effects would probably akin to or less than (say) the amount of speed reduction caused to a million-ton supertanker if
a flock of seagulls lands on its decks to rest a spell.
Put it this way: Contextually, in terms of the overall picture of what is now called "climate change", it might amount to a couple of millionths of a
degree per annum. Plus or minus.
Truly. I really believe all the satellites/space junk orbiting this planet have such a minimal effect on our overall climate that it would be almost
impossible to accurately calculate it, let alone measure it.
Even when our planet is totally eclipsed by the Moon, whose surface area and sun-obliterative effects are magnitudes greater than all the junk we have
buzzing around up there, the effects tend to be short-term and localized to its "path" across the earth's surface (as I have personally observed
once). But overall, even the effects of such a relatively massive body are minor.
edit on 4/12/17 by JustMike because: I fixed a bunch of typos.