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dc.contributor.authorMalone, Andrew.
dc.date.accessioned2011-11-15T16:37:56Z
dc.date.available2011-11-15T16:37:56Z
dc.date.copyright2011
dc.date.issued2011-11-15T16:37:56Z
dc.identifier.otherW Thesis 1372
dc.identifier.urihttp://hdl.handle.net/11040/23462
dc.descriptioni, 60 leaves : illustrations (some color), maps.en_US
dc.descriptionBibliography: leaves 59-60.
dc.description.abstractThe Interstellar Dust Hypothesis has been posited as a possible triggering mechanism for a Neoproterozoic Snowball Earth event [Pavlov et al., 2005]. This hypothesis is reevaluated using a zero-dimensional computer energy balance model with a more accurate set of optical assumptions for the dust layer. It is determined that a model with a reflective and absorptive dust layer has about a 20% reduction in the radiative forcing caused by the dust layer as compared to a model with a purely reflective dust layer. This reduction in the radiative forcing suggests that the results obtained by Pavlov et al. [2005] may be an underestimate for the dust cloud densities required to trigger a Snowball Earth event. However, even with the percent reduction in the radiative forcing, both climate models experience a substantial decrease in the incoming solar energy and serious surface temperature reduction, which would likely result in noticeable climate changes.en_US
dc.description.tableofcontentsThe Snowball Earth Hypothesis -- The Interstellar Dust Hypothesis -- Pavlov et al. [2005] methodology and results -- Zero-dimensional energy balance models : Earth's current climate -- Zero-dimensional energy balance models : purely reflective dust layer -- Zero-dimensional energy balance models : reflective and absorptive dust layer -- Two climate states -- Radiative forcing measurements.
dc.language.isoen_USen_US
dc.publisherWheaton College; Norton, Mass.
dc.subjectSnowball Earth (Geology)en_US
dc.subjectGlobal temperature changes.en_US
dc.subjectClimatic changes.en_US
dc.subjectGeomorphology.en_US
dc.subjectClimatology.en_US
dc.subjectCosmic dust.en_US
dc.subjectInterstellar matter -- Optical properties.en_US
dc.subjectEarth -- History.en_US
dc.subjectGeology, Stratigraphic -- Proterozoic.en_US
dc.subjectUndergraduate research.
dc.subjectUndergraduate thesis.
dc.subject.otherInterstellar Dust Hypothesis.
dc.subject.otherNeoproterozoic Snowball Earth event.
dc.subject.otherZero-dimensional computer energy balance model.
dc.subject.otherSnowball Earth event.
dc.subject.otherClimate changes.
dc.titleCould passing through an interstellar dust cloud have triggered a Neoproterozoic Snowball Earth?en_US
dc.title.alternativeCould passing through an interstellar dust cloud have triggered a Snowball Earth?en_US
dc.typeThesisen_US


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