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Global Warming Fact or Fiction Essay

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Global Warming: Fact or Fiction Essay Sample

Global warming tends to have a dramatic impression on the weather. What this means is places that normally do not see snow in the winter are now having white Christmases. To have a better understanding first you must understand the definition of global warming. The greenhouse effect is understood by the greenhouse gases in our atmosphere that are leading to a big increase of thermal radiation near our surface. The greenhouse effect too many scientists all have been in agreeance that the rising temperature from global warming.

Another effect from the global warming is the Arctic ice cap. The polar ice cap has melted more than 30, square miles since the last reading which was in The region is currently being affected by the constant changing temperatures which accompany the polar cap melting. There are many skeptics that simply cannot agree on the cause of the relationship of the rapid melting.

Now one thing is for sure that there is a major problem and it does not seem to be ending. Side Effects of Global Warming Global warming is an epidemic in which there are various side effects that may either be changed over time or leave room for no change at all.

There are various side effects in which global warming is contributed too. These changes include the thawing of frozen areas both above and below ground, land changes to include mountainous and seas, temperature, environmental and weather changes. The impact of global warming upon the environment is one in which many changes occur over long periods of time.

The long term effects of global warming have greatly impacted the weather in terms of the unpredictability seen today. The effect which has led to greenhouse gases such as carbon monoxide and methane buildup within the atmosphere and creates higher temperatures by trapping the suns heat Trimarchi, The thawing which is occurring both above and below ground are impacts in which global warming is contributing.

The milder winters in which temperatures have risen over the years has created the inability of regions such as the Artic to maintain the frozen lands as years of the past. The melting which is occurring underground has created changes within land forms.

This is due to how land that normally in the winter is frozen is impacted by the warmer temperature changes. These changes have an effect on crops, plants, and how carbon monoxide is exchanged Britt, The impact of such changes to mountainous areas for example creates changes which may result in landslides. The permafrost resulting from climate warming creates episodes of ice glaciers breaking away.

There are various man made causes which has greatly contributed to the global warming epidemic. For the highly irregular El Nino Mother Nature goes and rampages through the ocean tearing apart its regular temperature trends and killing trillions of aquatic animals.

And this is considered natural, whereas if humans caused the deaths of only a few aquatic animals, we would have our heads next to the gun barrel. With the oceans at a pH level of 8. These things we hear about the oceans becoming more acidic, and the air warmer, and the amount of life fewer. The question is though, how much more acidic, or warmer or fewer? The effects that humans have had on Global Warming are clearly misunderstood.

Some people like Professor John Farley are still arguing though that the Earth is getting warmer since us humans have started to pump more and more Carbon Dioxide into the atmosphere. How can this be if Carbon Dioxide is not even the most deadly greenhouse gas?

Global Warming is not because of us. Life is one thing that separates Earth from other planets. What is happening to this life on Earth though? Many people such as David Perlman argue that life is decreasing because aquatic calcium shelled animals cannot develop their shells. This may be a problem but Harvard-Smithsonian Astrophysicist Sallie Baliunas says that because of increased Carbon Dioxide levels in the atmosphere, plant life and agriculture are booming and becoming more and more abundant.

While the few aquatic shelled creatures may be having a harder time making their shells, plants are taking advantage. Damage we do not. It is interesting that we still think global warming is manmade even when scholars like Dennis T. Avery, director for the Global Center Issues, have made their point very clear about how Global Warming is a natural cycle that has been present on Earth since the beginning of its existence where temperatures rise and then fall over a course of years.

Along with William M. Gray, emeritus professor of Atmospheric Science at Colorado State University, they have been arguing that extreme temperatures both warmer and colder have existed on Earth before. We will perish from worrying so much and wasting economic time on this non-existent issue. So, where is our part? We have been told the changed truth. The most infamous is carbon dioxide, which is emitted through the respiration of humans and animals, the burning of fossil fuel, deforestation, and other changes in land use.

Carbon dioxide is the main focus of many greenhouse gas sanctions, since it is the greenhouse gas that has most been released into the atmosphere. However, some other gases may have a greater effect upon climate than CO2. If one examines research into the possible warming effect of other GHGs relative to CO2, one finds that over a year period, there are gases present in far smaller amounts that have a much more concentrated effect. Methane, a gas produced by livestock flatulence , oil and gas production, coal mining, solid waste, and wet rice agriculture, has 11 times more warming potential per volume than CO2 Science , or 25 times more per molecule Clarkson.

Nitrous oxide, produced mainly in connection with current agricultural practices, has times more warming potential per volume over this period than CO2 Science. Chlorofluorocarbons CFCs , the gases used as refrigerants and in aerosol spray dispensers that were banned some time back due to their ozone depletion potential, have times more warming potential per volume than CO2 Science. And so, as one might infer, studies are showing that additions of GHGs may cause the earth to get warmer than it naturally would.

This is what is referred to as anthropogenic human-caused global warming. Many times, the terms global warming and climate change are used interchangeably. But, this is not correct and the concepts are different. Climate change includes precipitation, wind patterns, and temperature. It also refers to the whole climate, not just weather conditions of one place.

Global warming is an indication of climate change. Earth has experienced much warming and much cooling throughout its history. There is a great deal of debate as to whether or not the earth is experiencing a globally warming climate change and, if it is, whether the underlying causes are man-made or natural.

Different research has given different results. A period from 5, to 3, BC when civilization began is called the Climatic Optimum and another period from — AD is called the Little Climatic Optimum or the Medieval Climatic Optimum, both so named for their unusually warm temperatures. Likewise, a period from to is known as the Little Ice Age for its unusually cold temperatures Pidwirny. At this time, glaciers in southern Norway reached their greatest extent in years Keigwin.

With such large variations possible, it is difficult to know where the next natural fluctuation could take us. Perhaps those who find that global climate is warming are simply measuring a natural fluctuation.

Or perhaps a natural fluctuation is masking the real effect of GHGs on the globe. Big Questions, Big Research As mentioned previously, there is a great debate over whether or not humans are causing global warming. As mentioned previously, we have attempted to cut away the personal attacks between the opposing sides, search for the kernel of truth or logic, where truth cannot be discerned , and get down to the heart of the matter. In order to properly read any of the reports or research on global climate change, one must keep in mind that nothing or almost nothing is certain.

Everything has a certain degree of uncertainty, a certain flavor of the unknown. There really is no conclusive evidence of global warming, and many scientists in favor of the global warming hypothesis say that it will be a decade or more before it is possible to develop any substantial evidence. Global climate is by nature always fluctuating, and that only adds to the confusion about anthropogenic global warming.

Compounding that confusion is natural variability, which is always working to confuse researchers just as they come close to attributing a perceived change in average temperature to some external factor, such as atmospheric composition GHGs or solar variation. It is estimated to take several hundred years for water to circulate from the deepest portions of the oceans back to the surface.

This means that if, for example, a pool of extra cold water is singled out and stored in the depths by some freak mechanism, it could stay there a century or two before resurfacing and producing a local, cool climate change Clarkson, North, and Schmandt.

Since no one can create another Earth let alone one that behaves exactly like ours and perform atmosphere-altering experiments on it, we are left with the alternative of theorizing based on observations. In other words, the only way we can purport to know anything about what might be changing in our climate is by playing with data, such as records of temperature, borehole measurements, etc.

Most of the body of global warming theory is based on computerized climate models called global circulation models or GCMs, for they are almost the only tools global warming researchers have.

GCMs are difficult to make as making them properly involves a deep-rooted understanding of the way the atmosphere works and how its actions are interconnected with other planetary bodies, such as the oceans or the terrestrial biosphere. But our understanding of the inner workings of the atmosphere and the ways it relates to other planetary bodies is not very good.

Renowned NASA climate modeler James Hansen, the man whose summer congressional testimony kicked off the climate change debate, states in the Proceedings of the National Academy of Sciences: They certainly are unable to form a mathematical description based on the kind of interconnections, or feedbacks, that the butterfly effect would suggest.

Because GCMs are so hard to make, often they account for the same processes differently; two models may have two different mathematical descriptions of what effect clouds have on warming, for example. Processes with a resolution smaller than a few hundred kilometers cannot be represented directly in the models, but instead must be parameterized, or expressed in terms of the larger scale motions, since the models do not have the resolution necessary to properly represent the actions of important weather systems such as tropical and extratropical cyclones.

To offset this downfall, a few parameterizations such as horizontal eddy viscosity, large-scale precipitation cumulus convection, gravity wave drag, etc. These factors keep the models from floating off into nowhere. Lately, a model has been designed and tested at the National Center for Atmospheric Research to eliminate the flux corrections. This model better incorporates the effects of ocean eddies, not by shrinking the scale, but by parameterization, passing the effects of these invisible eddies onto larger model scales using a more realistic means of mixing hear through the ocean that any earlier model did.

This model gives a 2oC rise in temperature due to a CO2 doubling. Some of the more popular GCMs assume that the concentration of CO2 will double in 70 years or quadruple in years and use the assumption to try to predict what the climate will be like in decades or even centuries based on that doubling or quadrupling.

GCMs are very sensitive to the representations of the effects of clouds and oceans, as their effects are complex and not understood well. While some GCMs are being specially made to simulate water behavior in clouds, limited vertical resolution i.

Problems in cloud feedback are seen as the Achilles heel of GCMs. Likewise, ocean representations were initially crude; in some early models, a swamp stagnant, heat-absorbing, heat and water vapor-releasing body of water was used as the oceanic model. Later models had a 50 meter thick slab of ocean that allowed summertime heat storage and wintertime heat release.

While not including ocean currents caused by the movement of heat to colder areas of ocean , these models attempted to represent seasonal responses to temperature in the upper ocean, but the lack of currents resulted in tropical oceans being too hot and polar regions too cold.

The main means of testing these mathematical models of the climate involves taking climate data from previous years, running the programs, and seeing if the computer results are close to the actual present climatic data. The problem there is that the data are not exactly accurate. When the predicted global warming ranges from. Satellite data view some is called insubstantial by some researchers for the short length of its records, but Phil Jones states that the shortness even of global-scale surface temperature records about years aids the uncertainty in the field.

Interestingly enough, current surface temperature measurements have shown a. Satellite trends in temperature vary smoothly, while in some surface data, one region will appear to be warming while those regions around it appear to cool. However, even after a careful readjustment the trend is still 0. Even while the satellites may need adjustments in their data for changes in orbit, this data is still more accurate than surface data. Satellites do not have anything in their surroundings to skew the data.

On the other hand, many sources of error exist here on Earth. Things as seemingly minuscule as variation in the color and type of paint used for the instrument shelters can skew data slightly, for different types and colors of paint absorb small but differing amounts of solar radiation. As another example, the urban heat island effect is known to make cities warmer at night and milder during the day.

The growth of urban areas during this century has resulted in a 0. Thomas Karl, climatologist at the National Oceanic and Atmospheric Administration NOAA , demonstrated in a paper that, if surface temperatures are corrected for the urban heat island effect, the years around emerge as the warmest, with readings since then showing a downward trend Crandall. If this bias exists in the global climate data set, its use to represent a wider geographic record for climate change studies will be misleading.

Another largely-ignored factor affecting temperature data is solar variation, or periodic changes in the brightness of the sun based on sunspots and the like. Some climate modelers say that the Sun only varies with an year cycle, and this period is too fast for the climate system to respond to. Hoyt points out that explosive volcanic eruptions have a one to two year long radiative forcing which does appear to affect climate, and so solar variance should have a substantial impact on climate.

But other, poorly measured, anthropogenic forcings, especally changes of atmospheric aerosols, clouds, and other land-use patterns, cause a negative forcing that tends to offset greenhouse warming. They studied North Pacific sea surface temperatures for the past 50 years and noticed that their pattern looked remarkably like that of satellite records of solar irradiance Kerr — New. Based on this, it would seem logical to include these effects in GCMs, but few researchers do.

Moreover, any calculated warming would be reduced by this cooling effect of volcanoes. Even though we cannot predict the occurrence of a volcanic eruption, we have sufficient statistical information about past eruptions to estimate their average cooling effect; yet this is one of several factors not specifically considered by the IPCC Singer — Scientific and many other models. If these models are wrong in their assumptions about climate, then everything that is thought to be known because of them is wrong.

If, however, their assumptions are right, but essential factors or effects within the global system are being omitted from study, then GCMs thought to be wrong may actually need only an enlightened tweaking. Unfortunately, enlightenment is difficult to come by in this field. Many, many things are still unknown. The possible effects of global warming have been played out in the media:

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It is interesting that we still think global warming is manmade even when scholars like Dennis T. Avery, director for the Global Center Issues, have made their point very clear about how Global Warming is a natural cycle that has been present on Earth since the beginning of its existence where temperatures rise and then fall over a course of years.

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Jun 26,  · Essay on GLOBAL WARMING – Fact or Fiction Introduction to Global Warming: Greenhouse warming has existed for quite some time, arguably since Earth was first formed.

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Global Warming Essay: Facts about Global Warming Spread Environmental Awareness and Encourage Fight against Global Warming Through Your Global Warming Essay The definition of Global warming is, “The observed and projected increase in the average temperature of Earth’s atmosphere and oceans”. Human actions, primarily the release of green. What is global warming? Global warming is the common scientific belief which states that man is producing greater and greater amounts of "Green House Gasses" such as carbon dioxide and methane, which trap the suns heat inside our atmosphere, heating up the planet to dangerous levels/5(5).

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Global Warming: Fact Vs. Fiction Essay Words | 7 Pages. Global Warming: Fact Vs. Fiction Global Warming -- the gradual increase in planet-wide temperatures -- seems to be accepted by many scientists and people now as fact. Global warming developed through the increased emissions of the noxious greenhouse gases resulting in an increase on the temperature of the earth’s surface (SciDev. Net). Global warming renders a variety of changes that affects the environment and the quality of life.