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Notes
Notes

... Ethics of Climate Change 1. We know that the creation gases such as CO2, cause climate change. 2. We know climate change puts the livelihoods and lives of the poorest and most vulnerable people in the world at risk. 3. We knowingly and unnecessarily contribute to the creation of gases that cause cl ...
Keeling Curve (Mauna Loa)
Keeling Curve (Mauna Loa)

... surface temperatures down over the past few years may be the sunspot cycle • Solar irradiance is slightly (~0.1%) higher at solar max than at solar min – We’re just emerging from solar minimum conditions, so this cycle may also cause the Earth to warm as we return to solar maximum ...
No Slide Title
No Slide Title

... Global Warming  The direct forcing of surface temperature and the water vapour feedback are sensitive to the specification of surface evaporation  Computer models, on average, under-specify evaporation increase with temperature by a factor of three and erroneously increase the amplification gain  ...
Global Warming
Global Warming

... atmospheric constituents on global climate is less certain than that of the better known greenhouse gases, but models suggest that in some areas they may have already acted to significantly retard greenhouse warming. It is important to note, however, that the global-scale warming predicted in climat ...
Survey on Global Climate Change - MicroBytes
Survey on Global Climate Change - MicroBytes

... perspective. Change is constant for the earth. Just because you take a measurement today in one moment of billions of years of change does not mean we need to keep levels constant. Change will occur so learn to adapt, accept it, or go extinct. The history of the earth is well written in geology, etc ...
Worksheet and answers for Activity 3
Worksheet and answers for Activity 3

... Worksheet and answers for Activity 3 The relationships among human activities and global changes can be assessed by making the appropriate measurements and analyzing the data in a way that shows the connections and their magnitudes. Human population can be closely estimated and the consequences of t ...
Impacts of Climate Change on Forests of the Northern Rocky
Impacts of Climate Change on Forests of the Northern Rocky

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Proof that CO2 is not the Cause of the Current
Proof that CO2 is not the Cause of the Current

... The historical record indicates that CO2 levels have been significantly higher than they are now, being 25 times at 545 Ma, (million years ago) (Veizer. J. et al 2000). The killer proof that CO2 does not drive climate is to be found during the OrdovicianSilurian (450-420 Ma) and the Jurassic-Cretace ...
Document
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Climate Change North America Position Paper
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Leftovers from Presentations
Leftovers from Presentations

... • Most important greenhouse gas (ghg) is water vapour but its concentration is determined by temperature • Important long-lived ghgs are CO2, CH4, N2O • Absorption by ghgs seen in satellite infrared spectra • Absorption proportional to log(concentration), so doubling ghg concentration gives same hea ...
Our Environment: an Uncertain Future
Our Environment: an Uncertain Future

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Increasing severity of the consequences of climate change Human

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report_v2

... dioxide in the atmosphere and the amount of climate change and, in reality, there are numerous feedbacks processes. Observed carbon dioxide concentrations during the 19th and 20th centuries can be simulated using a carbon cycle model such as the Bern carbon cycle model used in the IPCC 2nd and 3rd c ...
When researching back and looking at some of the things we need
When researching back and looking at some of the things we need

... quantity of several heat-trapping gases in the atmosphere over the past few centuries. For example, carbon dioxide concentrations in the Earth’s atmosphere are 34 percent higher today than they were at the onset of the industrial revolution in 1750—higher than at any time in the last 400,000 years. ...
Climate Changes - Council of Fresno County Governments
Climate Changes - Council of Fresno County Governments

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Climate change (doc)
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... The ice caps of the Arctic and Antarctica are melting. Ice shelves break into pieces and the current brings them to warmer waters where they melt swiftly. The permanent ice cover based on land is shrinking very rapidly too. What consequences can it lead to? Antarctic ice cap covers the territory of ...
Greenhouse effects
Greenhouse effects

... global climate, a special case of the greenhouse effect first described in 1896 by Svante Arrhenius, has also been called the Callendar effect. ...
Japan`s efforts to fight global warming have flagged in recent years
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... According to the report, the world’s average temperature rose by 0.85 degree Celsius between 1880 and 2012, and the world’s average sea level rose by 19 cm between 1901 and 2010. Sea levels have likely risen by an average 3.2 millimeters per year between 1993 and 2010. It also warned that concentrat ...
Human Activity and Environmental Stress, Sustainable development
Human Activity and Environmental Stress, Sustainable development

... concentration of carbon dioxide at 550ppm (about twice the pre-industrial level), global emissions would have to peak by about 2025 and fall below current levels by 2040 to 2070. • This would mean that all regions would have to deviate from most “business-as-usual”scenarios within a few decades ...
The Trillion-Ton Cap: Allocating the World`s Carbon Emissions by
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... The Trillion-Ton Cap: Allocating the World's Carbon Emissions by Fred Pearce October 24, 2013 - The U.N. climate panel concluded last month that carbon emissions should be capped at a trillion tons, a total the world is rapidly approaching. Now comes the hard part. How will we decide how the remaini ...
lecture_20
lecture_20

... There are a range of feedbacks in the climate system, including water vapor, changes in ice-albedo (snow and ice cover affect how much the Earth's surface absorbs or reflects incoming sunlight), clouds, and changes in the Earth's carbon cycle (e.g., the release of carbon from soil). The main negativ ...
Climate Change and Conservation
Climate Change and Conservation

... – Coral reefs may drown if sea level rise is faster than coral growth rates – Barrier islands may be changed • Loss of pack ice habitats in Antarctic and Arctic – Declines of pinnipeds/penguins dependent on edge of pack ice • Ocean circulation patterns will change – Upwelling may be reduced – Coasta ...
St. Xavier’s IV “Global Climate Change and Water Disasters” International Conference on
St. Xavier’s IV “Global Climate Change and Water Disasters” International Conference on

... considerable pride, we claim that we have achieved this progress (?) in less than 300 years, beginning 1760 as opposed to the millions of years that God took to enact His grand design of Creation. The 'Rational Scientists', apologists, for those who set the house on fire with their fossil fuel guzzl ...
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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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