Posted on 11/13/2004 4:51:17 PM PST by Coleus
Those who can't forecast the weekend's weather are saying that polar ice is melting, the seas are rising and the sky is falling. Haven't we seen this movie?
Some 300 scientists this month produced an Arctic Climate Impact Assessment report that warned of an accelerating melt-off of the Arctic polar ice cap and the Greenland ice sheet.
They pleaded with industrial nations to reduce their emissions of so-called "greenhouse" gases, directly contradicting other scientific and historical evidence that the warming and cooling of the Earth is a natural cycle in which man's impact has been minimal.
Their report reads like the script of the movie "The Day After Tomorrow." Released in May, the film is based on the theory that the melting of polar ice would shut down the Gulf Stream, leading to a frozen New York, tornadoes in Los Angeles and snow in India.
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In April, a team from Harvard concluded the most comprehensive study of global temperature over the last 1,000 years. It found that the world was much warmer during the Middle Ages than it is today. Vineyards flourished in England.
Humanity not only survived, it flourished. When Eric the Red brought settlers to Greenland in 986, the climate supported a Viking way of life based upon cattle, hay, grain and herring for about the next 300 years.
Was it man-made pollution that allowed three centuries of Nordic settlement in Greenland? Don't think so.
(Excerpt) Read more at investors.com ...
Since dozens of periods of extreme warming and cooling have occured during the last million years of geologic history, without an industrial "straw man" to blame, it is impossible for an educated and rational person to give these socialist morons with an agenda any credibility whatsoever.
To repeat the obvious, the computer models that these controlling twits use, when fed weather data that actually occured for 10 prior years, uniformly fail to predict the weather that already occured accurately for the following day, week, month year or decade.
Yet they would have us rely on their failed science to "prove" that following their social agenda will beneficially affect the next extreme swing of mother nature.
How delusional and arrogant can they be?
WHAT?! THATS INCREDIBLE! Are you tellin me that the weather gets WARMER in the summer and COOLER in the winter? You're crazy.
Check your facts. None of what you said is true.
It was totally stupid -- but a really cool eye-popping summertime special effects extravaganza.
I thoroughly enjoyed it, notwithstanding the idiotic plot and the ridiculous characterizations.
"Propaganda that took millions of the loony left to the cleaners."
Even better, took millions of loony left dollars and flushed them!
You should disprove the facts he stated...that is the way debate works.....it seems logical to me.
Actually, water expands when it is warmed because it becomes less dense. When water is cooled it contracts. Potholes in roads, for example, are caused by water entering a crack in the surface, freezing and then expanding as it cools.
It is foolish to say that when I leave a Beer in the freezer it does not expand until it explodes...
Water expands when it freezes--like Imperialist noted, pop cans explode if left in the freezer. Just thought I'd clear that up. However, it doesn't expand 10 times!
Put water in ice cube tray and freeze. It will expand some, but nowhere near 10 times.
You got your decimal misplaced -- The ratio is approximately 1.1 to 1.
Ice specific gravity is 0.91 ( Condensed Chemical Dictionary ). Therefore ice is .91 as heavy as water or 1/.91 = 1.099 more volume per pound ( or approx 10 percent more volume )>.
Ice has a density ~ 9% less than that of water. Lets say its 10% less for ease of calculation, and do an experiment.
We have a beaker filled with 1000 cc of water. We lower the temperature, and form (say) a 100cc ice cube. This 100 cc icecube is made from 90 cc of liq. water, so the rest of the beaker contains 910 cc of water.
The mass of this ice cube =90 grams. It is floating in the water. If it is floating it is displacing enough water to support its weight. The displacement volume = m/d , where m is the mass of the ice cube, and d is the density of water. The volume displaced is therefore 90cc of water (1cc of water=1 g)
Note that the ice cube volume is 100cc not 90 cc. The extra 10 cc is above the water line, where it is not displacing any water. The waterline is therefore at the point for 910 cc of liq water + 90 cc of displacement, or 1000 cc. The sams as it was before we lowered the temperature.
We increase the temperature, and the ice melts. The 100 cc "iceberg" becomes 90 cc of water, so we have no displacement and 90 + 910 cc of liq water, or 1000 cc again.
Note - the water level doesn't move.
so if the NORTH Polar Ice cap were suddenly to melt, sea height would not change by a single mm, as the volume displaced would cancel out.
However if the SOUTH Polar cap melted, we'd be underwater. Why?
While water does expand when it freezes, ratio is not 10:1 but more like 1.11 to 1. Just look at an ice cube floating in the water. About 1/10 is above the water. That means that the volume of the other 9/10s is the same as that of the original water, because the water it displaces weighs the same as the whole ice cube. Thus the total volume of the ice is 10/9 or 1.111 times the original volume of water.
Another way to see that the 10:1 is not correct is to think about making ice cubes in a tray. If you fill up the tray, the ice produced doesn't take up 1/2 the freezer section of the refrigerator, it just sticks up a little above the fill line.
Huh? Water does not expand when it cools. Cracks in the surface are caused by expaning ice when water cools and then shrinking when it warms up. If water didn't expand when cooled our lakes and ponds would fill with ice in the winter and kill all the fish in them. The way to prove this is to freeze a pond and watch. If water contracted when cooled the ice would sink to the bottom of the of the pond or ocean, instead it expands and therefore stays on top of the water. This is a scientific fact and cannot be disputed even by anyone. Freeze your engine in the winter and watch in split from the pressure.
I can't see it so much in the graph, perhaps because of the scale, but I do remember reading that CO2 levels typically rise FOLLOWING a rise in temperature. Thus, the whole global warming hypothesis (I won't dignify it by calling it a theory) is based on the premise that the effect precedes the cause.
It has been known for over 20 years that Co2 is the culprit.
When, in the past, the south polar cap melted the ocean level rose quite a bit. Conversely, in colder times the ocean level receded.
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