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Originally posted by lockheed
"According to the New York Times, The Earth's magnetic field began to shift 150 years ago and the world is beginning to undergo major changes. A pole shift could cause major damage on a worldwide scale."
Originally posted by Outland
Much like the topic of "global warming", hype and scare mongering sells and the NYT is a pro at it. Historically, they have a poor record for science reports. Back in 1929, they ridiculed a scientist for saying that a rocket could fly in the vacuum of space. Years later, that scientist's work launched the Apollo missions. Robert Goddard was that scientist.
When baby loggerhead turtles embark on an 8,000-mile trek around the Atlantic, they use invisible magnetic clues to check their bearings. So do salmon and whales, honeybees and homing pigeons, frogs and Zambian mole rats, scientists have found.
Originally posted by Netchicken
Personally I am glad that there is someone out there rooting for the Zambian mole rats. They must be protected at all costs!!
Originally posted by Outland
Climate has and always will change. Anomalies and extremes have happened and always will. That's the nature of anomalies and extremes.
Perhaps what has really changed is man's perception of current extremes. Mass media and rapid global communications make anything that happens anywhere into an instaneous world event. All of the earth's records show that climate has had drastic changes, both slow and sudden. It seems that when something happens in our own lifetime, it's somehow worse than ever before and unexpected.
"Yes, climate does change, but how will it impact us now that we are so overpopulated?
Muaddib pondered again:
"How will it affects us when these changes hits us in full, worse than what is happening now, and catch us unprepared with no real long term plans in case the worse happens?"
"It is not only perception, the weather is worsening and is slowly hitting areas where populations have concentrated. --- We are already being hit with freak climate, i don't think even you can't deny that. --- But what happens when things get worse as they seem to be getting every year? --- Does it hurt anyone to acknowledge what is happening? or to make preparations for the worse?"
Originally posted by Outland
In an inverse perspective, why aren't we mentioning that Australia, New Zealand and the Antarctic are having a fairly normal Winter right now? Why aren't we mentioning that the Arctic ice is growing and has actually thickened over the past few years? Of course, it will be Summer there in a few months and then we can scream that the ice is melting.
Tuesday, May 25, 2004 Posted: 11:22 PM EDT (0322 GMT)
"There is dramatic climate change happening in the Arctic right now ... about 2 to 3 times the pace of the whole globe," said Robert Corell, chairman of the Arctic Climate Impact Assessment, an 1,800-page report to be handed to ministers in Iceland in November.
The melting is destabilizing buildings on permafrost and threatening an oil pipeline laid across Alaska.
Sept. 23, 2003 — Arctic scientists have reported that the largest remaining ice shelf in the north polar waters has succumbed to a rapidly warming climate.
Quebec City - Sep 24, 2003
The largest ice shelf in the Arctic has broken, and scientists who have studied it closely say it is evidence of ongoing and accelerated climate change in the north polar region. The Ward Hunt Ice Shelf is located on the north coast of Ellesmere Island in Canada's Nunavut territory and its northernmost national park.
INTERNATIONAL GLACIOLOGICAL SOCIETY
INTERNATIONAL SYMPOSIUM ON ARCTIC GLACIOLOGY
Approximately two-thirds of the Earth's small glaciers and ice caps are located in the Arctic, in addition to the 1.7 million km2 Greenland Ice Sheet. The enhanced climate warming predicted for the Arctic is likely to have important consequences for the mass-balance and dynamics of Arctic ice masses; accelerating melting has been observed in some parts of the Arctic already, providing a significant contribution to observed global sea-level rise.
There is variability in temperatures from year to year, and also from decade to decade superimposed on the longer upward trend (see Global Temperature graph). The range of natural variability in global temperature seems to be about plus or minus 0.2° C, so that it is only after the late 1970s that global mean temperatures emerge from the noise of natural variability (Trenberth 1997). The northern high latitudes have experienced greater warming than the mid-latitudes or the southern high latitudes. This is apparent in the Temperature Change for Three Latitude Bands graph. In some northern regions, extreme warming has been detected. Locations in Alaska and northern Eurasia, for example, have warmed by nearly 6.0° C in the winter months over the past 30 years (Serreze et al. 2000). The warming is not universal, some cooling has occurred in the North Atlantic and central North Pacific and is known to be a consequence of changes in the atmospheric circulation.
Originally posted by Muaddib
You mean something like this?.....
The Antarctic ice sheet stores 90 percent of Earth’s frozen freshwater. Its freezing and melting dynamics have many implications for climate change. Now, scientists Eric Rignot from NASA’s Jet Propulsion Laboratory and Stanley Jacobs from Columbia University’s Lamont-Doherty Earth Observatory reveal in the June 14 issue of Science that the bottoms of Antarctic ice shelves are melting more rapidly at their grounding lines — where ice detaches from the seafloor and begins to float — than previously thought.
US scientists say the floating fringes of the Antarctic ice sheet are melting faster than previous studies had suggested.
They say the rate of melting is linked to the temperature of the surrounding seawater.
NASA Instrument Captures Early Antarctic Ice Shelf Melting
January 13, 2003
An international research team using data from NASA's SeaWinds instrument aboard the Quick Scatterometer spacecraft has detected the earliest yet recorded pre-summer melting event in a section of Antarctica's Larsen Ice Shelf. This huge, nearly 200 meter (656 foot) thick plate of glacier-fed floating ice, which in the late 1980s was about as large as Indiana, experienced dramatic disintegration events beginning in 1995 that have reduced its area by nearly 10 percent, or more than two trillion tons of ice.
Recent Moderate Resolution Imaging Spectroradiometer (MODIS) satellite imagery analyzed at the University of Colorado's National Snow and Ice Data Center revealed that the northern section of the Larsen B ice shelf, a large floating ice mass on the eastern side of the Antarctic Peninsula, has shattered and separated from the continent. The shattered ice formed a plume of thousands of icebergs adrift in the Weddell Sea. A total of about 3,250 km2 of shelf area disintegrated in a 35-day period beginning on 31 January 2002. Over the last five years, the shelf has lost a total of 5,700 km2, and is now about 40 percent the size of its previous minimum stable extent.
Friday October 31, 2003
A giant ice shelf the size of Scotland is melting rapidly in the Antarctic, scientists have warned today.
Two sections of the Larsen ice shelf collapsed in 1995 and 2002. Now satellite measurements have confirmed that it has thinned by as much as 18 metres more than usual in the past decade, because of a warmer ocean.
The report comes a day after a University College London report in the journal Nature confirmed a 40% thinning of the ice in the Arctic Ocean in the past 30 years.
Updated April 26, 2004
Most scientists agree that global warming presents the greatest threat to the environment.
There is little doubt that the Earth is heating up. In the last century the average temperature has climbed about 0.6 degrees Celsius (about 1 degree Fahrenheit) around the world.
From the melting of the ice cap on Mount Kilimanjaro, Africa's tallest peak, to the loss of coral reefs as oceans become warmer, the effects of global warming are often clear.
However, the biggest danger, many experts warn, is that global warming will cause sea levels to rise dramatically. Thermal expansion has already raised the oceans 4 to 8 inches (10 to 20 centimeters). But that's nothing compared to what would happen if, for example, Greenland's massive ice sheet were to melt.
Last Update: Saturday, March 6, 2004.
Glacier melt indicates global warming changes
On the north-east coast of the island, glaciologists were disturbed to find Brown Glacier is melting at a faster rate than before.
In the 50 years to 2000, the glacier consistently lost half-a-metre of ice each year.
Australian Antarctic Division Glaciologist Dr Doug Thost says in the years since then it has been melting at almost four times that rate.
"The surface has been lowering just on average about two, just over two metres every year," Dr Thost said.
"It's a four-fold increase in that lowering rate."
Dr Thost says it is an early warning sign of global warming changes that scientists can expect further south.
Originally posted by cmwig
Quote source news.bbc.co.uk...
Scientists have discovered a potent new greenhouse gas in the Earth's atmosphere.
The UK, German and US researchers stumbled across the molecules while they were studying other greenhouse gases.
Trifluoromethyl sulfur pentafluoride is said to be 18,000 times better at trapping heat than the main human contribution to the greenhouse effect, carbon dioxide.