Scientists have, for the first time, quantified a direct link between greenhouse gas (GHG) emissions and polar bear survival. The report “Unlock the Endangered Species Act to address GHG emissions” provides a template for estimating the demographic impact of proposed GHG-emitting actions on polar bears overcoming a loophole in the Endangered Species Act (ESA) that has historically blocked climate considerations. The approach outlined in the paper connects the dots between greenhouse gas emissions, the number of ice-free days caused by specific amounts of emissions, and polar bear survival rates. The implications of this study go far beyond polar bears and sea ice, with the methodology applicable to other species and policy frameworks.
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By Hannah Hickey
Dec 21, 2020
Today’s weather forecasts come from some of the most powerful computers on Earth. The huge machines churn through millions of calculations to solve equations to predict temperature, wind, rainfall, and other weather events. A forecast’s combined need for speed and accuracy taxes even the most modern computers.
The newly developed global weather model bases its predictions on the past 40 years of weather data, rather than on detailed physics calculations.
The simple, data-based AI model can simulate a year’s weather around the globe much more quickly and almost as well as traditional weather models, by taking similar repeated steps from one forecast to the next, according to a paper in the