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The greenhouse effect and global warming
The greenhouse effect and global warming

... Particularly alarming are the possibilities of indirect effects of global warming that could further accelerate climatic changes. These are known as ‘positive feedbacks’ and so far they have not been adequately accounted for in the climate models. With the warming of the oceans and the surface air a ...
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Beckt_EnviroSci_FinalAssignment - G-Beckt
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... greenhouse gases must cause the Earth to warm in response.  Ice cores drawn from Greenland, Antarctica, and tropical mountain glaciers show that the Earth’s climate responds to changes in solar output, in the Earth’s orbit, and in greenhouse gas levels. They also show that in the past, large change ...
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ESS15 Winter 2016 supplementary study guide by Dianne Sanchez
ESS15 Winter 2016 supplementary study guide by Dianne Sanchez

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3.1 – Intro to Climate Change

... climate = weather conditions that occur in a region, averaged over a long period of time o broader, more encompassing than weather o includes average temperatures, wind speeds, precipitation levels, humidity, etc. o ex: Ottawa’s climate is ……………………., whereas Mexico’s climate is …………………  climate has ...
Slide 1
Slide 1

... Assumes that the most stable molecular shape has the electron pairs surrounding a central atom as far away from one another as possible ...
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Climate change feedback



Climate change feedback is important in the understanding of global warming because feedback processes may amplify or diminish the effect of each climate forcing, and so play an important part in determining the climate sensitivity and future climate state. Feedback in general is the process in which changing one quantity changes a second quantity, and the change in the second quantity in turn changes the first. Positive feedback amplifies the change in the first quantity while negative feedback reduces it.The term ""forcing"" means a change which may ""push"" the climate system in the direction of warming or cooling. An example of a climate forcing is increased atmospheric concentrations of greenhouse gases. By definition, forcings are external to the climate system while feedbacks are internal; in essence, feedbacks represent the internal processes of the system. Some feedbacks may act in relative isolation to the rest of the climate system; others may be tightly coupled; hence it may be difficult to tell just how much a particular process contributes. Forcings, feedbacks and the dynamics of the climate system determine how much and how fast the climate changes. The main positive feedback in global warming is the tendency of warming to increase the amount of water vapor in the atmosphere, which in turn leads to further warming. The main negative feedback comes from the Stefan–Boltzmann law, the amount of heat radiated from the Earth into space changes with the fourth power of the temperature of Earth's surface and atmosphere.Some observed and potential effects of global warming are positive feedbacks, which contribute directly to further global warming. The Intergovernmental Panel on Climate Change's (IPCC) Fourth Assessment Report states that ""Anthropogenic warming could lead to some effects that are abrupt or irreversible, depending upon the rate and magnitude of the climate change.""
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