(WUSA9) -- Scientists with the National Oceanic and Atmospheric Administration say that summer ice in the arctic could be almost gone by the middle of this century.
Researchers examined three difference models that calculate sea loss. They found that the most optimistic model puts Arctic sea ice completely gone by 2060. The worst case scenario is 2020.
Arctic sea ice is considered one of the most visible signs of climate change. Its loss can also impact weather in the northern hemisphere and lead to changes in ecosystems and economies.
Full results of this study were published in the American Geophysical Union publication Geophysical Research Letters.