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| January 22, 2013 |
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Budyko’s Model Forced by Milankovitch Cycles,
Richard McGehee, School of Mathematics |
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Forcing Budyko's model with Milankovitch cycles produces some of the important features found in the climate data. |
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| February 5, 2013 |
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The mid-Pleistocene transition as a Hopf bifurcation,
David Morawski, School of Mathematics |
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| February 12, 2013 |
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Thermal Infrared Radiation and Carbon Dioxide in the Atmosphere,
William Satzer, 3M Corporation |
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| February 26, 2013 |
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Dynamic oscillations in Paleoclimate Theory; insights into Crucifix's 2011 survey paper,
Samantha Oestreicher, School of Mathematics |
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| March 5, 2013 |
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Climate Sensitivity, An Introduction,
K.K. Tung, University of Washington |
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A large part of the controversy about predicted greenhouse global warming lies in the uncertain climate feedback processes. Without various feedback processes, the globe would warm by only 1.2 K at equilibrium in response to a doubling of CO2 concentration in the atmosphere. Current generation of general circulation models predict a range of warming, from 2 K to 4.5 K. The uncertainty range has not been narrowed for over 30 years. In this talk. we first give a mathematical derivation of the climate feedback factors, and discuss why it is difficult to narrow the uncertainty range. We then discuss recent progress in constraining climate sensitivity using observed response to solar variation and using data on relative humidity. A promising approach using transient climate response is also discussed.
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| March 26, 2013 |
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Options for geologic sequestration of carbon in the upper Midwest: mineral carbonation and deep injection,
Harvey Thorleifson, Minnesota Geological Survey |
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Increasing concern about climate change has necessitated assessment of ways to reduce emissions, while increasing our preparedness to adapt. Emissions reductions can be achieved by reducing combustion of fossil fuels, by reducing other activity that generates greenhouse gases, and by increasing carbon storage in vegetation and soils. In addition, the technology to capture CO2 from sources such as electrical generating stations and ethanol plants is available, allowing geologic sequestration through methods such as deep injection or mineral carbonation to return carbon to the geosphere. Options within Minnesota therefore are being assessed, as an alterative to eventual transportation of CO2 by pipeline to a jurisdiction such as North Dakota or Illinois. |
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| April 9, 2013 |
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Triggering a deglaciation through oceanic CO2 release,
Anna Barry, Institute for Mathematics and its Applications |
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| April 23, 2013 |
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Large scale human effects on the planet: When did they start?,
William Satzer, 3M Corporation |
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| May 7, 2013 |
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R. Jaffe et al: Closing a major gap in the global charcoal budget, Max Jodeit, School of Mathematics |
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