Planetary Albedo Lab Report

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In this section, we will look at how each factor was affected by the forcing boundary conditions set in the six experiments we ran. The results section will be organized in sections by factor.
Annual Planetary Albedo
First we will address results about how annual planetary albedo was affected by altering the forcings in the simulations. Overall, when comparing Control Experiment (Modern Specified SST) to Primary Experiment 3 (Ice Age 21kya run), we observed a relatively higher planetary albedo during the Last Glacial Maximum, with an average of 2.37% increase. In areas with known ice sheets, such as the Laurentide Ice Sheet over the upper section of North America or the Scandinavian Ice Sheet over Northern Europe, there was a much more drastic
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These maps, Figures 4 and 5, more consistently show a very slight albedo increase between the modern era and the other comparative eras than the previous maps have. But it is apparent that the albedo increase is much higher regionally in the simulation that mimics both the greenhouse gas levels and the orbital values of the LGM (Figure 5) than in the simulation that mimics only the orbital values of the LGM (Figure 4). Again the average changes in planetary albedo are 0.14% and 0.02%, respectively, but the overall intensity of focus of the albedo changes is less than in the SST simulations. These mixed oceans back up the discovery that albedo is affected much more by greenhouse gas levels than orbital values, but does not reveal much on the effects of SST and mixed ocean simulations on the globe as a whole, aside from the smoother layout of the mixed ocean. Finally, Figures 6 and 7 represent how annual planetary albedo would be change if worldwide CO2 and/or CH4 levels were doubled. These maps show the lowest levels of planetary albedo to be in low latitudes, and the highest to be in highest latitudes. There is nearly no change between Figure 6, which only accounts for CO2, and Figure 7, which accounts for both. This reveals that methane gas does not have much of an impact on planetary albedo, and carbon dioxide has a much stronger

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