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Unlike in the Arctic, where models tend to agree that sea ice is decreasing, models of sea Man Brown Cheap TOMS Classics Canvas Shoes ice in the Antarctic tend to vary more widely, said Stroeve, who compared satellite imagery to model results to pick the models that could most closely simulate historic ice conditions.
In the end, the researchers chose to use five models for the study. When they ran those models forward to get an idea of what sea ice would look like by the end of the century, the results also varied, said NCAR researcher Marika Holland, a co-author of the study. But all the models showed some decline in the area used by the penguins, known as Terre Adelie.
"The reason we chose five instead of one is it gives us a way to quantify some of the uncertainties in the models themselves," Holland said. "They do all produce a different sort of future."
The collaboration between biologists and climate scientists for the study is somewhat of a rarity in the scientific toms shoes wholesale world, said Holland, though she noted it's becoming more common.
"Biologists and climatologists -- we kind of speak different languages," Holland said. "We sometimes use different terms for the same things."