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Essay on arctic climate change
Essay on arctic climate change
Global warming affecting the arctic
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Northern Canada, usually experiencing very low temperatures, are now receiving much warmer temperatures which has started to give rise to many issues. One of the main challenges facing Northern Canada due to the warmer weather is the melting of the Permafrost and the destruction that it is causing to both living and non-living organisms. The word ‘Permafrost’ refers to a ground that remains “at or below the freezing point for at least two consecutive years” (Bone, 52). In Canada, almost 76% of the land is occupied by the Arctic and Subarctic regions, which has a combination of continuous, discontinuous and sporadic permafrost (Bone, 52). Continuous permafrost is mostly seen in the Arctic and almost 80% of it remains frozen. On the other hand, discontinuous permafrost is mostly seen in the subarctic and approximately 30% to 80% of the ground is frozen and finally sporadic permafrost is seen in parts of Canada closer to the south and has less than 30% of the ground permanently frozen (Bone, 53). However, in the past few decades, geographers have noticed that the average temperature of the planet is rising faster than it normally used to, which is a direct consequence of global warming. The permafrost has started to degrade causing negative effects on greenhouse gas emissions, man-made structure, vegetation, wildlife, sea ice and the lifestyle of the Inuit people in the North.
Canada’s population makes up almost 5% of the world population, and astonishingly contribute approximately 2% of the world’s greenhouse gas emissions. This results in permafrost melting, which releases a large amount of greenhouse gases, including CO2 and methane. When energy from the sun reaches the Earth’s surface, it absorbs some energy, while releasing t...
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The Arctic region is home to a variety of valuable animals and plants, including polar bear, seal, and so on. The ecosystem of the Arctic region is fragile because these animals are evolved to live in extreme conditions. With the climate change, many animals are endangered. Ice is the habitat of polar animals because they have to rely on sea ices for resting, food, and reproduction. With the climate change and the decrease of sea ice, the number of polar animals is decreasing and their health is threatened. For example, the average weight of female polar bears in 1980 was about 650 pounds, but the number reduced to about 500 pounds in 2004 (Djoghlaf 15). The earlier breakup and later condensation of sea ice shortens the hunting season of polar bears. Polar bears mainly feed on seals that indwell icy land. The melting ice reduces the number of seals and food intake of polar bears. In addition, polar bears are used to living in ice caves. The rising temperature causes the collapse of ice caves, which can kill baby bears. The climate change is negatively affecting the biodiversity in the region and will definitely harm the ecosystem
The Arctic has a key role in Canada’s history and future, as 40% of Canada’s landmass composes of its three northern territories. Arctic Sovereignty has become a national priority for Canada in the 21st Century due to international interests, such as rapid industrialization, climate change and transportation. Therefore, the geopolitical importance of the Arctic has never been any greater than it is now.
The southern parts of Canada rely on water that rivers such as The Bow, Red Deer, and Northern Saskatchewan provided to many sectors of society. The water budget for these particular rivers are based from mountain headwaters; therefore, runoff and snowmelt are vital with respect to preservation among these rivers (Prowse and Conly, 1998). A study conducted in 1951-1993 Hopkinson and Young (1998) concluded ice erosion, not including snow melt, contributed to 1.8% of emission into the Bow River. These results were based on examining volume fluctuations in an upstream lake. Although this sum seems extraneous the benefaction is indispensable. Due to climatic temperature changes, glacier area has decreased and as a result, the Bow River is not receiving
People are responsible for higher carbon dioxide atmosphere emissions, while the Earth is now into the Little Ice Age, or just behind it. These factors together cause many years discussions of the main sources of climate changes and the temperature increasing as a result of human been or natural changes and its consequences; even if its lead to the global warming, or to the Earth’s cooling. In their articles, “Global Warming Is Eroding Glacial Ice” by Andrew C. Revkin and “Global Warming Is Not a Threat to Polar Ice” by Philip Stott, both authors discuss these two theories (Revkin 340; Stott 344). Revkin is right that global warming is taking place. Significant increase of carbon dioxide in the atmosphere is due to human activities combined with natural factors such as volcanic emissions and solar radiation – all together they lead to climate changes and temperatures rising. At the same time, other factors such as deforestation contribute to environmental changes for some glaciers not less than air pollution. However, during global warming not all regions of the planet are affected in the same way, local warming and cooling are both possible during these changes.
Bryant, T., Raphael, D., Schrecker, T., & Labonte, R. (2011). Canada: A land of missed
This artic tundra is mainly formed by permafrost, “a layer of permanently frozen subsoil in the ground”. Putting frozen ground and flat landscape stops the drainage of water. As the water is being held up on the surface, it makes ponds and bogs that give moisture to the plants, or countering the low precipitation. “The periodic freezing and thawing of the soil forms cracks in the ground in regularly patterned polygons”. Some areas are not drained very well, causing irregular landforms.
Earth has experienced many episodes of dramatic climate changes with different periods in earth history. There have been periods during which the entire planet has been covered in ice and at another time it has been scorchingly hot and dry. In this regards, earth has experienced at least three major periods of long- term frigid climate and ice ages interspersed with periods of warm climate. The last glacial period which current glaciers are the result of it, occurring during the last years of Pleistocene, from approximately 110,000 to 10,000 years age (Clayton, 1997). Indeed, glaciers present sensitive indicators of climate change and global warming and by estimating and monitoring the dynamic evolution of these ice masses, several aspect of climate change impact on environmental phenomena can be revealed.
The topic of climate change and global warming has always been one of great debate and controversy; however, it’s clear to see that Canadians should take precautions to avoid the problems their country faces. The Canadian government should do everyth...
Freedman, B. (2010). Environmental Science: A Canadian Perspective – Fifth Edition. Pearson Prentice Hall. Toronto, Ontario, Canada.
The book by David Archer (2009) includes details that will make the readers understand the future of climate change as well as past events that have changed the present climate, as we know it. David Archer is a professor of geophysical sciences at the University of Chicago and has done many public presentations on the earth’s climate change before releasing his book, the long Thaw.
2009: 10+. CPI.Q (Canadian Periodicals) -. Web. The Web. The Web.
Meehl, Gerald A. "Solar and Greenhouse Gas Forcing and Climate Response in the TwentiethCentury." 2012. Web 13 May 2015
Global heating and cooling has occurred on a cycle for millennia, however in the past thirty years the increased use of energy and fuels by humans has drastically changed this natural occurrence (Juerg, 2007). The largest cause of this warming is the release of carbon dioxide from the burning of fossil fuels. Carbon dioxide levels are twenty-five percent higher than they were in 1957 (UCS, 2013). This seemingly insignificant change has caused a myriad of negative effects. The endangerment of species, rising sea levels, and increased natural disasters are just a few examples of change brought about by global warming (Juerg, 2007).
The earth is a complex system, which continues to evolve and change. Climate change and global warming are currently popular in the political agenda. But what does “climate” really mean? The difference between weather and climate can be conveyed in a single sentence: “Climate is what you expect; weather is what you get.” Based on research of the geologic record, we know that climate change has happened throughout Earth's history and at present, ever-increasing evidence points to the roles that humans play in altering Earth systems. The Earth and its atmosphere receive heat energy from the sun; the atmospheric heat budget of the Earth depends on the balance between incoming solar radiation and outgoing radiation from the planet; which has been constant over the last few thousand years. However present evidence seems to suggest that the recent increase in temperature has been brought about by pollution of the atmosphere, in particular the release of huge amounts of carbon dioxide, mostly through Anthropogenic Forcing (human activity) and other various internal and external factors. I...
Global warming is an increase in the earth's temperature due to fossil fuels, industry, and agricultural processes caused by human, natural, and other gas emissions. This results in an increased evacuation of greenhouse gases. “Short-wave solar radiation sinks into the Earth's atmosphere and warms its surface while long-wave infrared radiation emitted by earth's surface is absorbed, and then re-emitted by trace gases.” (2)