[QUOTE=brazil84]
You seemed to be hypothesizing that we are in some kind of feedback loop which involves a lowering of the Earth’s albedo because of a loss of ice, which, according to you, is already happening.
[/QUOTE]
There´s an ongoing trend of loss of ice mass in the planet. Plain, simple, verifable, hard, concise and undeniable fact.
Snow and ice have a higher albedo than, well, practically anything else on the Earth´s surface. A reduction on ice area will decrease the planet´s albedo. Lower albedo, more heat absortion equals more warming. If that´s not a feedback loop I don´t know what may be.
At present, as far as I know the albedo reduction is too small to have any relevant impact, but if trends in melting continue and ever more ice covered areas turn into open ocean or land the albedo will further decrease and it´s effect on thermal balance will become more evident.
In other news, 2+2 found to be 4.
[QUOTE=brazil84]
Well, it doesn’t seem to be happening in Antartica. Moreover, the other graph you link to shows sea ice coverage to be at essentially the same level it was 28 years ago.
[/QUOTE]
Essentially the same? excuse me but there´s an obvious, downward trend in that graph all through most of the measured period.
You know, it´s pointless to argue with you if you simply refuse to see what you have in front of your own eyes.
[QUOTE=brazil84]
In any event, you again did not answer my earlier question:
What if there is a (relatively) low level of Antarctic sea ice for the next few years? In your opinion, would that undermine your position?
And here’s another:
What if global sea ice levels continue to increase over the next few years? In your opinion, would that undermine your position?
[/QUOTE]
What if my grandma had wheels?, then she´d be a bicycle…
My position is, in this case, that data shows an average trend of diminishing ice surface (increasing CO2 levels, glacier melting, temperature increase, sea acidity, sea levels, etc, etc, etc…). Scratch that, is not a position, it´s a statement of fact. If subsequently the data shows that the ice area increases I will stubornly stick to my preconcived ideas and refuse to change my understanding of the matter… oh no, wait. If the trend is reversed I´d say somethings, “oh, look, the ice area keeps getting bigger and bigger, interesting, how does this fit in the overal climate picture?”
When you, OK, at least me, make a decision I work with known facts and reasonable, logical expectations to arrive at the best choice. Basing decisions on the onging problem of global warming on the hypothetical that the current trends will stop or reverse for some unknown reason is simply irresponsible. Like I said is taking a bet that ignorance of the facts and processes of nature will save the day in the end.