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Negative impacts of climate change
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Climate Change: A Greenland Perspective
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Climate change is the alteration of temperature and precipitation patterns over an extended period of time. Across the globe, scientists are identifying climate change in relation to the greenhouse gas emissions and solar cycles. While most researchers believe that the increase of atmospheric CO2 is effecting global warming, others are endorsing the concerns of another Ice Age, which is likely to occur due to orbital variations of the Earth. In his article, Abrupt Climate Change, Richard Alley titles one section, ?Chilling Warmth,?15 which perfectly describes the angst of many people who foresee a deadly warming trend, and also the paradox of global warming causing another ?Little Ice Age.? These competing discourses are extremely pertinent to the country of Greenland, which is at the forefront of the climatic change debate.
Greenland and other Arctic countries continue to be at the head of the discussion on climate change, whether due to melting ice caps, or advancing glaciers. Our understanding of climate change across the world has been possible due to Greenland?s ice cores; proxy records, such as O18 dating, reveal atmospheric air temperatures at which the sheets of ice were formed.16 Oxygen in the ice cores can also reconstruct the history of precipitation. Greenland remains a critical story teller of cooling and warming trends, since the 1990s, when scientists first started to extract from the gigantic sheets of ice.17
Scientists who view increased CO2 emissions as directly related to a warming climate are radically concerned for the outcomes of warming oceans, rising sea levels, and higher precipitation levels. For example, in an article for Nationa...
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...ric air temperature, but in contrast to Amos? belief that Arctic temperatures in Greenland have decreased by 1.29 degrees Celsius, since 1985, Peter Spotts of The Christian Science Monitor, documents a seven degrees Fahrenheit increase in Alaska, western Canada, and Russia over a fifty year period.33
From the research that I have conducted, I have realized how integral Greenland is in the dialogue on global warming and abrupt cooling; furthermore, I recognize that climate change needs to be of global concern, not only to scientists, but to the government and all citizens; every regional climate change in the Northern Hemisphere directly influences temperature and precipitation in the Southern Hemisphere. We are all connected, and it is imperative that humans intervene and become aware of how their environmental choices may affect biodiversity around the world.
In his essay, “Global Warming is Eroding Glacial Ice,” Revkin is arguing that global warming is constantly changing the ...
First, global warming has an immense impact on Arctic Sovereignty as the rise of greenhouse gases thrive in Canada along with other countries. Within 20 years, the polar ice caps of the Arctic have melted twice as fast compared to before. The loss of Arctic ice can furthermore pose a threat to shipping, as navigating the Arctic becomes increasingly challenging. Finally, climate change threatens the extinction of numerous animal species, namely the polar bear. Hence, global warming poses a major challenge to Arctic Sovereignty and Canada along with other members in the Arctic Council must prevent it.
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.
Climate change is on the international policy agenda primarily because of warnings from scientists. Their forecasts of a potentially dangerous increase in the average global temperature, fortuitously assisted by unusual weather events, have prompted governments to enter into perhaps the most complicated and most significant set of negotiations ever attempted. Key questions - the rapidity of global climate change, its effects on the natural systems on which humans depend, and the options available to lessen or adapt to such change - have energized the scientific and related communities in analyses that are deeply dependent on scientific evidence and research.
The ice sheet extends from about 60° to 83°N over a distance of 2,400 km in the North Atlantic Ocean. The ice sheet covers 1.71 million km2 , or roughly 80% of the surface of Greenland. It consists of a northern dome and a southern dome, with maximum elevations of 3,230 m and 2,850 m, respectively, linked by a long saddle with elevations around 2,500 m. Its total volume is about 2.85 million km3, which, if it were to melt entirely, would raise global sea level by about 7.2 m. The ice sheet has an average thickness of 1,670 m and reaches a maximum of 3,300 m in the center. The bedrock surface below the ice sheet is an extensive flat area near sea level, which would rebound by as much as 1,000 m if the ice sheet were to be removed (Figure 1). Precipitation over Greenland generally decreases from south to north, ranging from about 2,500 mm per year in the southeast to less than 150 mm per year in interior northeastern Greenland. The southern high precipitation zone is largely determined by the Icelandic low and the resulting onshore flow which is forced to ascend the surface of the ice sheet. In contrast to Antarctica, summer temperatures on Greenland are high enough to cause widespread summer melting. This results in an ablation zone with negative mass balance all around its perimeter. Ablation rates are highest over the southwestern part of the ice sheet where...
Canada’s arctic has evidently suffered from substantial climate change, resulting in devastating impacts on all systems in the north. Many climate models indicate that these significant changes will only progress in the future. The monitoring of temperatures in the Arctic have demonstrated that, over roughly the past 50 years, there has been a warming of about 2 to 3°C as of 2009. The average temperature in the arctic has increased almost twice as fast than the rest of the world. In 2020, the projected increase is up to 4°C as well as 8°C by 2050. A numbers of studies have shown that, based on previous climate records, there has been issues of rising sea levels, alterations in sea-ice dynamics, and permafrost degradation. Though there have been multiple strategies posed and adopted, the government of Canada needs to develop an arctic strategy that is more proactive and systemic than previous actions. This strategy needs to be global in its goals for mitigation while still monitoring social, cultural, and economic aspects
As the world becomes continually warmer, the effect of climate change in the arctic regions becomes more intense. Within the past 50 years, arctic regions in Canada have experienced warming of 2 to 3 degrees Celsius (Fergal & Prowse, 2007). One of the most important areas in the Canadian arctic is the Cryosphere (Appendix A), which is the area consisting of season snow cover, permafrost glaciers, and sea ice (Fergal & Prowse, 2007). This area is significant because it has provided a stabilized surface for building pipelines, as well as provides access to northern communities (Fergal & Prowse, 2007).
The Web. 04 Feb. 2014 -. The Effects of Global Warming. National Geographic. N.p., n.d. Web.
Furthermore, this analysis must take place amidst serious gaps in the existing research and technology concerning the developing climatic conditions. For these reasons, global warming stands as one of the most daunting policy issues facing our world today. This is compounded by the debate over the very existence of climate change. While countless sources of empirical evidence testify to the very real presence of climate change the world over, considerable denial of the phenomenon still exists. The argument has been made that evidence of climate change is a gross overstatement, or in some cases, a complete fabrication.
Chasing Ice covers the long debated topic of global warming and whether or not human activity is currently causing global temperatures to rise. Evidence suggests that increased carbon dioxide emissions over the past couple hundred years are responsible for the warming of the Earth’s surface, and thus increasing the levels of the ocean due to an accelerated rate of ice melting. We discussed this same topic in class and how humans are contributing to the greenhouse effect which plays a large role in trapping these unnatural amounts of gases such as carbon dioxide in the Earth’s atmosphere and causing a rise in the number of natural disasters around the world.
There is no longer any question that our world climate has changed (King, 2004). Over the last 100 years, "temperatures have risen by about 0.6 degrees Celsius and global sea level has risen by about 20cm" (K...
It is an unquestioned fact that the climate is changing. There is abundant evidence that the world is becoming warmer and warmer. The temperature of the global land average temperature has increased by about 8.5 degrees centigrade from 1880 to 2012 (Karr, et al 406). The one or two degrees increase in temperature can cause dramatic and serious consequences to the earth as well as humans. More extreme weather occurs, such as heat waves and droughts. The Arctic Region is especially sensitive to global climate change. According to the data in recent decades, the temperature in the Arctic has increased by more than 2 degrees centigrade in the recent half century (Przybylak 316). Climate change has led to a series of environmental and ecological negative
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.
Global warming and climate change have been frequent topics of discussion over the past several years. Although people tend to focus on the politics, it is time to look past the media aspects of it and into the cold hard facts of what our Earth is currently experiencing, and what caused it in the first place. The cause of climate change includes natural causes, but human causes are what is generating such a rapid global change. It’s time that the ways in which humanity affects the Earth’s climate, how scientists record and measure the climate change, and what can be done in everyday life to slow it down and/or stop global warming, are recognized.
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...