GENERAL DATA

If the water rises to 50 meters, this will happen: (pictures of William Haxby)
Before the advent of the industrial age, the concentration of CO2 in the atmosphere was 280 ppm (parts per million).

– Today the level is 400 ppm. This represents an increase of about 42% in less than 100 years.

For earth, that is a rate of change unprecedented, about 10,000 years compressed change in 100 years. Today there is more CO2 in the air than there was during the entire period of human evolution. The land is used to slow changes, not quick. Slow changes allow time for the biosphere and species to adapt. Rapid changes can cause biological chaos and disrupt agricultural production. Carbon dioxide is critical in controlling the balance of the temperature of the earth because it absorbs infrared radiation (IR), which is basically heat.

By interrupting a huge ocean current, melting Arctic sea ice can trigger a severe drop in temperatures in Europe and North America.

Global warming could plunge North America and Western Europe into a deep freeze, possibly within only a few decades.

This is a theory that is gaining credence among many scientists who study climate. The thawing of sea ice covering the Arctic could disturb or even halt large currents in the Atlantic Ocean. Without the vast heat that these ocean currents deliver – comparable to the energy output of a million nuclear power plants – the European average temperature could drop 5 to 10 degrees Celsius (9-18 degrees Fahrenheit), and parts of North America would be chilled only a little less. This change in temperature would be similar to global average temperatures toward the end of the last ice age, about 20,000 years ago.

Some scientists believe this shift in ocean currents can arise suddenly in an unexpected way – in a period as short as 20 years time – according to Robert Gagosian, president and director of the Woods Hole Oceanographic Institution.

The second factor is the thermal expansion of ocean water. As the temperature of ocean water increases and the seas become less dense, they will spread, occupying a larger surface of the planet. A temperature increase will accelerate the rate of increase in sea level.

During the past 50 years, sea level has risen 0.18 centimeters a year, but during the past 12 years, the ratio is 0.3 centimeters per year. This increase in sea levels is a direct consequence of global warming melting the polar ice caps.

Along relatively flat as the Atlantic coast, or along coastlines bordering fertile river deltas and densely populated, a rise of 1 mm in sea level causes a shoreline retreat of 1.5 meters.

The Earth’s temperature increases to levels that no one predicted, and the human being would be responsible for almost all of that increase.

Since 1860 there was an increase of between 0.3 and 0.6 degrees centigrade.

Now, it is between 0.4 and 0.8 degrees. The observed change is significantly higher.

This is higher because recent years have been very hot, the last decade was the warmest in the last thousand years.

The Earth’s climate is warming so rapidly that many animal and plant species can not survive under the new conditions and disappear.

The loss of species could rise to 20 percent in some particularly sensitive ecosystems such as northern Canada, the Tibetan plateau and southeast Australia, the report issued by the World Wildlife Fund (WWF) and the David Suzuki Foundation , from Canada.

Animals and plants face the same choice at the end of the last Ice Age -emigrar or die-but many will not survive because the rate of warming is much faster, says the report.

Some plants that need colder climates will have to migrate 100 times faster than when the Ice Age ended.

“Very few plant species can move at speeds greater than one kilometer per year, and yet what will be needed in many parts of the world,” the report’s authors wrote.

“The pace of warming may be much higher than even 13,000 years ago, when the tigers with fangs like sabers and woolly mammoths still roamed the Earth. We simply can not continue to sit and accepting this devastating loss, “said David Suzuki, a researcher at the University of Toronto.

If things do not change, it is expected to increase in temperature of between 0.2 and 0.6 degrees Celsius every 10 years; an increase in rainfall of 3% to 10% by 2050; decreased range of diurnal temperatures; raising the level of the oceans of 4-10 centimeters every 10 years.

The average temperature of the Earth will, in the 2020-2030 decade between 0.3 and 1.3 degrees higher than the 1990-2000 average, according to research conducted in the UK by Peter Stott of the Met Office in Bracknell and Jaime Kettleborough Rutherford Appleton Laboratory. In its conclusions both stress the fact that their models of future climate simulations give similar temperature increase when they make different projections for the future with different scenarios of the evolution of emissions of greenhouse gases.

A secret Pentagon report, but that has not been publicized by the government of George W. Bush, made a catastrophic projection of what the world will look in 20 years, as a result of climate changes that are occurring on the planet. The document, which was seen by the British Sunday newspaper The Observer, argues that the Earth in 2020 could be the victim of mega droughts, mass migrations and wars.

The controversial report was commissioned by the Pentagon adviser Andrew Marshall, a living legend in the Department of Defense whose influence on US military thinking has been noticeable in the last three decades. The authors of the paper are Peter Schwartz, CIA consultant and former head of planning Shell and Doug Randall of Global Business Network of California.

“National security problem”

The report is a call to stop climate change “to be a scientific debate to become an issue of American national security.” An imminent scenario of catastrophic climate change is “very likely and would challenge the United States national security in ways that should be analyzed immediately,” he says. In fact, he warns that “the unrest and conflict will be endemic features of life”.

Randall explained, “it is a very particular threat to national security because there is no enemy to point the guns and we have no control over the threat,” adding that perhaps it is too late to prevent catastrophe occurs. “We know exactly where we are in the process.

The Pentagon noted. Andrew Marshall, a senior planner of the Ministry of Defense, recently released an unclassified report detailing how a shift in ocean currents in the near future could compromise the security of the United States.

According to a 1992 report, Josefino Comiso, a climate scientist at NASA’s Goddard Space Flight Center of NASA, the Arctic ice has been declining since the beginning of satellite observations in 1978 to an average of 9% per decade. Studies based on more recent figures put the rate at 14% per decade, suggesting that the disappearance of Arctic sea ice is accelerating.

As this will cause a decline of between 5 and 10 degrees Celsius in temperatures in the region he said.

It will also severe flooding in countries like Norway, Finland, Sweden, Britain, etc.

It is estimated that Britain will become small islands:

Rising sea levels due to climate change could drown London and other coastal cities such as Edinburgh and Bristol, according to a study.

The UK could become a series of islands because of that phenomenon, the report of the Benfield Hazard Research Centre at University College, London.

The warming of the polar ice caps may cause melting of the ice caps and raising sea levels, which would have disastrous economic and social consequences for rich and poor countries.

The low-rise island nations in the Pacific will be flooded or drinking water aquifers invaded by salt water in just a few years.

This will affect many countries, and many will disappear in a few decades.

Today, countries such as the Pacific islands of Indonesia, Oceania, northern Canada and Alaska are already seeing the consequences, to the point that Alaskans have already begun to evacuate, and the White House has criticized reports:

Living proof of the devastating effects of global warming is the Eskimo village of Shishmaref. It has lost much ground in recent years has become the most famous case of the consequences of climate change study. The few more than 600 Inuit (Eskimos in the area) who still live there, have literally seen how water has swallowed much of the beaches that once surrounded the town, and some of the houses and igloos have fallen into the sea.

To that it joins the temperatures in Alaska have risen an average of 4.4 ° C over the last 30 years, which has contributed largely to thaw in many areas and has raised the sea level.

But Shishmaref is not the only danger. According to a government report of Alaska, 184 other people are at risk from the effects of erosion or flooding. Four of them already have approved relocation plans.

During the past 50 years, sea level has risen 0.18 centimeters a year, but during the past 12 years, the ratio is 0.3 centimeters per year. This increase in sea levels is a direct consequence of global warming melting the polar ice caps.

Along relatively flat as the Atlantic coast, or along coastlines bordering fertile river deltas and densely populated, a rise of 1 mm in sea level causes a shoreline retreat of 1.5 meters.

Then a year now Atlantic coasts decreased by more than 4 meters


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