Contribution Of Aero Engines In Global Warming

3018 words - 13 pages

CONTRIBUTION OF AERO ENGINES IN GLOBAL WARMING


CONTENTS
Page No

Introduction 3
What is Global Warming? 3
Aviation's Contribution 4
Global Emissions 4
Environmental Effect ...view middle of the document...

Aircraft engines produce emissions that are similar to other emissions resulting from fossil fuel combustion. However, aircraft emissions are unusual in that a significant proportion is emitted at altitude. These emissions give rise to important environmental concerns regarding their global impact and their effect on local air quality at ground level.Aviation is a relatively small contributor to climate change. Aviation is responsible for 2% of manmade CO2 emissions worldwide.This is according to The United Nations Intergovernmental Panel on Climate Change (IPCC).However, with predicted industry growth, that amount is set to slowly rise.This is small compared to the principal sources of CO2 emissions, such as power generation and road transport, but this does not mean that the aviation industry is ignoring its commitment to combating climate change proactively.
What Is Global Warming?
2. In its most commonly used sense, “global warming” refers to the gradual warming of global-average temperatures due to the slowly increasing concentrations of man-made atmospheric greenhouse gases, primarily carbon dioxide.But global warming can alternatively refer to simply the observation of warming,without implying the cause(s) of that warming.

3. The burning of fossil fuels, mainly petroleum and coal, produces carbon dioxide as one of the by-products. As of 2010, the concentration of carbon dioxide is about 50% higher than it was before the start of the industrial revolution in the late 1800's. The potential warming effect of the extra CO2 is through its ability to absorb and emit infrared radiation, which is the type of radiation the Earth continually loses to outer space in response to heating by sunlight. This makes carbon dioxide a greenhouse gas, albeit a weaker one in the atmosphere than water vapour.

4. The net effect of greehouse gases on is to keep the lower layers of the atmosphere warmer that they otherwise would be without those gases. Therefore, it has seemed reasonable to assume that an increase in greenhouse gases would lead to warming.

Aviation's Contribution

5. Air travel is one of the world's fastest growing source of greenhouse gases (computing an IT is another) like carbon dioxide, which cause climate change. Globally the world's 16,000 commercial jet aircraft generate more than 700 million tonnes of carbon dioxide (CO2), the world's major greenhouse gas, per year. Indeed aviation generates nearly as much CO2 annually as that from all human activities in Africa. One person flying a return trip between London and New York generates between 1.5 and 2 tonnes of CO2.

6. CO2 emissions are the principal cause of global warming and the United Nation’s Intergovernmental Panel on Climate Change (IPCC), the foremost global authority on the issue, has confirmed that aviation contributes 2% of the world’s CO2 emissions.Despite growth in passenger numbers at an average of 5% each year, aviation has...

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