Based on scientific evident we know planet earth has experienced periods of global warming and cooling over a period of 4 billion years, give or take a few billion years of earth's existence. However, most of the change in climate/temperature has occurred gradually over ten thousands, one-hundred thousands, or millions of years depending on the frame of reference in which you wish to view the change.
Viewing global warming or cooling from the frame of reference of a human lifetime the change should be so gradual that we would not recognize it. It would be like trying to watch grass grow. Lay down of your lawn this spring and try watching a blade of grass for a couple of hours to see if it grows. The growth would be so gradual that you wouldn't be able to detect it, yet the grass grows enough in a week to need mowing. There have been period in Earth's past, where rapid heating, cooling, and climate change has occurred, but usually a cause like an earthquake, a volcanic eruption, an asteroid hit, etc can be identified as the cause. For some reason rapid change is occurring to earth today. Earth has significantly changed in only a few human generations, yet there has been no disaster to explain the rapid change. It seem scientists should be able to identify the cause of this rapid change, and if it's due to the planet warming, then it seems it would resister on thermometer around the world. There are other changes that are taking Place. Over long periods of time the continents have significantly change positions in relations to each other, due to continental drift. It would be interesting to know how GPS system are adjusted for movement of objects like fence boundaries, for example, as the six tectonic plates side around on the surface of earth. http://www.ucmp.berkeley.edu/geology/anim1.html http://en.wikipedia.org/wiki/Continental_drift Regards, LelandJ On 12/21/2009 10:28 AM, Nicholas Geti wrote: > As I have mentioned in the past you cannot take one isolated spot on the > earth and claim the planet is cooling. Here is my take on the Iceland ice > pack: > > The Labrador current flows north past Greenland than heads East as the ice > blocks any further northerly direction then meanders south on both sides of > Great Britain. Iceland is somewhere in the middle of this eastward flow. As > the Arctic ice melts the Labrador current moves further northward before > heading east and also carries the loose ice with it towards Iceland where it > tends to pile up. You can see the same effect when leaves float downstream > in a river. Small whirlpools develop around clumps of tree roots and other > obstructions and along the river's edges. Leaves can be caught in these > whirlpools for a long time. > > I also claim that taking temperatures on any land mass over a period of time > proves nothing whether the planet is warming or cooling. Land accounts for > only 1/7 or 14% of the total earth's surface. It is the oceans that control > all weather and planet temperatures. By total volume, the oceans account for > 80% of the planet total volume, leaving the core to account for most of the > remainder. The volume of the land mass is only about 3 or 4% and cannot > affect the planet's temperature by any significant amount. The Sun's heat > does not penetrate the land mass to any great extent probably no more than > five feet which is why the soil at that depth remains pretty much at 55 > degrees F. all year long. > > The specific heat of water is 1.00 while granite that composes most of the > land mass is 0.19 which means the oceans can absorb many times the number of > BTU that the earth's crust can absorb. Moreover, water circulates both > horizontally and vertically which the land mass does not. In fact the land > mass absorbs a small amount of heat when the sun is shining and gives it > back at night, whereas the oceans can absorb/emit the heat and then > circulate is somewhere else rather than lose/gain it immediately. > > Since there are very few ocean monitoring stations in place around the world > we do not know the history of ocean temperature. However, we do know that > corral beds around the world are dying, e.g. Australia's Barrier Reef, from > warmer water and the Northwest passage is opening more every year. > > ----- Original Message ----- > From: "Publius Maximus"<[email protected]> > To: "ProFox Email List"<[email protected]> > Sent: Friday, December 18, 2009 8:47 PM > Subject: [OT] Science: Another Ice Age? > > > http://bit.ly/63Zn3I > > - - - > As they review the bizarre and unpredictable weather pattern of the > past several years, a growing number of scientists are beginning to > suspect that many seemingly contradictory meteorological fluctuations > are actually part of a global climatic upheaval. However widely the > weather varies from place to place and time to time, when > meteorologists take an average of temperatures around the globe they > find that the atmosphere has been growing gradually cooler for the > past three decades. The trend shows no indication of reversing. > Climatological Cassandras are becoming increasingly apprehensive, for > the weather aberrations they are studying may be the harbinger of > another ice age. > > Telltale signs are everywhere —from the unexpected persistence and > thickness of pack ice in the waters around Iceland to the southward > migration of a warmth-loving creature like the armadillo from the > Midwest.Since the 1940s the mean global temperature has dropped about > 2.7° F. > - - - > > Every time I reread this Time magazine blast from the past, I get a > warm-fuzzy feeling about scientific consensus, not unlike what I > experience when downing two or three glasses of single-malt Scotch > whiskey. > > Ahhh! > > Damn, it's going down to near freezing Sunday night here in Tampa. > Better stock up! > > - Publius > _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[email protected] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. 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