Last Glacial Maximum

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Each response was affected differently by the orbital variations, and similarly by greenhouse gas levels. Orbital variations had little affect on annual planetary albedo, while the addition of altered greenhouse gases recreated the albedo pattern found during the LGM more accurately. Changes in both greenhouse gases and orbital variations least effected the annual precipitation. Because the response of precipitation was most similar between the Control Experiment and Primary Experiment 3 it is likely that precipitation is not as heavily influenced by the conditions of the Last Glacial Maximum as the other factors. Annual snow and ice cover patterns could be recreated by altering present day levels of orbital variation and greenhouse gases to…show more content…
Orbital variations had some effect, but not enough to be considered a major factor. While we now know how the patterns came to be, we remain uncertain how the strength in climate changes during the Last Glacial Maximum came to be. What the significance in the forcings’ influence on the response of the intensity of ice sheet growth, low temperatures, and high albedo during the Last Glacial Maximum are still unclear, although, we are certain greenhouse gas levels are important…show more content…
Bouttes et al (2011). We compared maps presenting our main factors (planetary albedo, precipitation, snow and ice cover, surface air temperature) with doubled levels of carbon dioxide alone, or doubled levels of carbon dioxide and methane together. Each and every comparison revealed what little impact methane has compared to carbon dioxide. Globally, surface air temperature average lowered 0.07 degrees C, snow and ice coverage average increased 0.7%, precipitation did not change at all, and average planetary albedo increased 0.02%. These minute changes were nothing compared to the vast changes caused by doubled carbon dioxide, which models we ran to compare the see the effect of extreme variations in greenhouse gas levels. Our research led us to discover that greenhouse gases had a strong impact on the Last Glacial Maximum, and carbon dioxide was the greenhouse gas that specifically caused most of this impact in both warming and, more importantly, in
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