According the
article, global warming is causing the Earth to reshape and shift in land mass.
In very cold areas prone to subzero temperatures such as the arctic and the
tundra, there is a frozen layer of the Earth that scientists refer to as
permafrost. Permafrost is found across the top of the Northern Hemisphere,
especially in Alaska, Arctic Canada and Siberia in Russia. Scientists have traveled over much of those regions and measured temperatures and observed the
effects of melting permafrost. Permafrost is what its name implies, permanently
frozen ground. Permafrost is usually
several feet deep and according to scientists has remained frozen for several
hundred years. The article states that this
thick subsurface layer of soil that remains frozen throughout the years,
occurring only in chiefly Polar Regions, is beginning to melt away.
In a nutshell this
article expressing how scientist are tracking the Earth’s temperatures and keeping
a record of how they are rising as time goes on. One reason for the rising
temperatures and the melting of glaciers and permafrost is due to greenhouse gasses
that are trapped in the Earth’s atmosphere. According to the article, scientists have estimated
that there is twice as much carbon in the permafrost layers as in the
atmosphere now, so we are looking at tripling the carbon dioxide. And that basically
means more warming. It's a very dangerous cycle that deserves immediate attention
before something drastic occurs hear on Earth.
What is
interesting about this article is scientist have built simulations of the earth’s
permafrost layer in underground tunnels to study the effects of prolonged
exposure to carbon dioxide. The findings were that eventually the surface would
wear down and fall off. This means that possibly, in reality, if something is
not done about global warming the Earth’s frozen layers will begin to melt and
break away, reshaping the Earth today as we know it.
http://www.aljazeera.com/indepth/features/2014/03/climate-change-shifts-earth-alaska-2014327667287787.html
No comments:
Post a Comment