First 660 words of the document:
John Reardon 12 at
Why is global warming a particular problem in the arctic?
Global warming is a natural process, increased by human activities , global warming effects
the whole world increasing temperatures which in turn have a knock on effect, one of the
most effected location is that of the arctic is situated in the north (artic circle 66.5 degrees)
covered in an ice sheet that is melting away, many ecosystems and cultural actives depend
on the ice sheet to provide with a stable platform on which they can hunt for food including
155 000 natives, whom mostly eat seal
Animals including the polar bear and seal, which in turn affect the entire food web.
Artic cod and many artic fish such as halibut and the crustaceans lobster and crab and other
species of the type that live and thrive in the arctic and loin mane jelly fish
These effects are having an increased rate on the artic than any were else on the planet so it
is of concern. Due to the positive ice albedo feed back this is why the arctic is so susceptible
to a rise in temperature and has been a particular problem in the artic. Where less solar
radiation is reflected away as it normal would so this increasing temperature increasing the
rate of melting of the caps resulting in more radiation to be absorbed. if the polar bears are
unable to hunt there offspring in the spring season due to thinning of ice or no ice are unable
to eat so gradually the is a decline in the numbers of polar bear which will then have a
negative effect on the marine food web this suggest that the whole of the arctic independent
on a constant temperature not that of a high one caused by global warming.
Animals because of the ice melting trawlers are able to get to parts of the marine ecosystems
that were once inaccessible are now accessible so they fish for artic cod and halibut whom
have been natives. Rising temperatures has lead to the quantity of marine based plants
(phytoplankton, plankton) to die of therefore altering the food chain so smaller fish species
are unable to live and reproduce. Like that of the ever shrinking population of the seals
therefore decreasing food availability this has a negative multiplier effect.
Social impacts of global warming for the Inuit because there food supply to be ever
decreasing with the added danger of there homes being flooded. They used to be protect
against storms and ocean waves from the sea ice but are now forced to move more inland
due to these factors. Declining stocks of marine life have a negative impact on the working
Inuit this causing greater pressure on them and caribou (wild mousse type mammal).due to
this decrease in numbers Inuit family are unable to provide a nutrient full meal therefore
causing a range of defishentseas throughout.
Environmental impacts can cause catastrophic disasters due to a range of factors such as
permantly frozen ground know as permafrost is thawing out due to the ever increasing
temperatures this could cause more fresh water to be released.
Whole ecosystem can be wiped out such as a tundra ecosystem in which withstand extreme
cold these ecosystems have unnaturally melted(thawed out) away causing other plants and
species to take over.
More area of forest are experiencing forest fires causing wide spread damage in artic Russia
there have unexecepted forest fire in the coniferous and as these forest are so large and
accountable, this can have a dramatic effect on the whole planet as they are carbon
sinks(something in which takes in carbon from the surrounding) which are no longer there.