Browsing articles tagged with "Antarctica Archives - DirtyAmmo"
Aug 12, 2013
Zaid

Alps, Antarctica and Changes

Climate and global warming have now started to go hand in hand or is it the other way around> In any way, the debate remains the same. Recent changes in the climate and the latitudinal shifts have caused rise in temperatures in some areas which could possibly lead to global warming. Well, the ozone is more important than oxygen in this case. We need oxygen to suffice on earth, but if the ozone layer gets depleted, we would not even still live anyway.

The ozone layer is a protective layer built around the globe in order to save the earth either from the harsh rays of the Sun. Since this is all very basic here, let us discuss some basic changes that came across within the last ten years in the history of climate and unkempt global warming.

ALPS:

The European Alps have been lucky to have a dignity of their own in the face of the Alpine trees. However, recently, general warming has caused a shift of about 1-4 meters as reported to occur every decade due to the possibility.

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ANTARCTICA: 

Also, Antarctica has been experiencing distributional changes on the large scale due to the settling of liquid water and increased temperatures. Antarctica is considered to be the only continent where the floating of tonnes of icebergs is supposed to be quite apart from abnormality. However, as recent studies pose tough problems, one could see the icy continent possessing little liquid water which also supports the part that temperatures have been way far from the original.

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May 17, 2012
Julia

Global Warming Threatens the King Penguin

The long-term survival of the king penguins in Antarctica is in danger. The reason? Global warming, rising water temperatures and the amount of prey that these penguins feed. This actually comes from a study of Hubert Curien, a Multidisciplinary Institute in France that is part of the French National Center for Scientific Research.

The species, second in size after the emperor penguins, have their habitat on the islands of the northern limits of the Antarctic. It is estimated that currently, there are around two million breeding pairs.

The food of these penguins are small fish and squid, which has begun to erode as a result of global warming. This is due to the high temperatures of the sea prevent these mammals inhabit the area.

The researchers suggest that every rise of 0.26 ° C in sea surface will lead to a 9% decrease in adult penguin population, which places the species at high risk. This is because the average temperature increase expected for the next two decades is 0.2 ° C.

May 14, 2012
Julia

What is Global Warming?

The term Global Warming refers to the gradual increase in temperature of the atmosphere and oceans on the Earth. Global warming has been detected at present, in addition to its continued growth which is projected in the future.

A review of the plot of land surface temperatures of the past 100 years, was an increase of about 0.8 ° C, and most of this increase has been in the past 30 years.

Still, most of the scientific community says there are more than 90% certainty that the increase is due to increased concentrations of greenhouse gases from human activities, including deforestation and the burning of fossil fuels like oil and coal. These conclusions are supported by the science academies of most industrialized countries.

The projections from climate models were summarized in the Fourth Report of the IPCC (Intergovernmental Panel on Climate Change) in 2007. They indicated that global temperatures will likely continue to rise during the twenty-first century. The increase would be between 1.1 and 2.9 ° C in the lower emissions scenario, and between 2.4 and 6.4 º C in higher emissions.

An increase in global temperatures will result in changes as already being observed worldwide. These changes are:

  • Rising sea levels
  • Changes in the pattern and amount of precipitation
  • Expansion of subtropical deserts

The temperature increase is expected to be greater at the poles, especially in the Arctic and will see a retreat of glaciers, permafrost and ice in the seas.

Other effects include more frequent extreme weather, including droughts, heat waves and heavy precipitation. Extinctions are expected due to temperature changes and variations in the crop yield.

Experts hypothesize that if the increase in global average temperature is higher at 4° C compared to preindustrial temperatures in many parts of the world, the natural systems can not adapt and therefore can not support their surrounding populations. In short, there will be no natural resources to sustain human life.

May 7, 2012
Julia

An increase of carbon dioxide in the atmosphere preceding the last defrost

London, England – The increased concentration of carbon dioxide in the atmosphere of the Earth may be a cause of rising temperatures that led to last thaw. An international team of scientists, led by American, Jeremy Shakun, has reached this conclusion after analyzing the causes of melting, which began 15,000 years ago and ended 12,000 years.

Previously, the data obtained of ice cores from Antarctica had hinted the relationship between carbon dioxide and temperature rise, but left no clear involvement of CO2 in the evolution of glacial cycles. Experts differed if carbon dioxide had a role in the last thaw, and if their influence was secondary or even if it was a result of melting rather than its cause.

This latter hypothesis is the fact that the Antarctic thermal growth began two thousand five hundred years before it began to concentrate carbon dioxide in the atmosphere. According to the study authors, led by scientist at the University of Harvard, Jeremy Shakun, this variation is due to fluctuations in temperature between the two hemispheres and questions the role of carbon dioxide at the end of the last ice age.

An analysis of 80 planktonic microorganisms on the planet who still have thermal data at the time, concluded that although there were other factors that favored regional Earth warming, the only thing that affected the entire land area was the increase in CO2.

Among the causes that helped also included solar radiation warming, rising sea levels or decrease in the ice sheet that covered the Earth. These researchers say that each of the two phases of thermal growth that occurred in the last thaw, the first 17,000 years ago and the second 12 thousand years ago, were preceded by a remarkable growth of carbon dioxide.