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  1. A composite image of blooming phytoplankton and swirling currents along the coast of California and western Mexico. (Credit: Norman Kuring / NASA)

    Ocean acidification prediction now possible years in advance

    A team of researchers has developed a method that could enable scientists to accurately forecast ocean acidity up to five years in advance. This would enable fisheries and communities that depend on seafood negatively affected by ocean acidification to adapt to changing conditions in real time, improving economic and food security in the next few decades. 

    • Climate

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  2. Simulation of past climate shows recent models may be too sensitive to carbon dioxide

    A climate model simulation of the Early Eocene period roughly 50 million years ago returned temperatures that were too high compared to evidence in the geologic record, suggesting that the model may also project unrealistically high temperatures for the future.

    • Climate

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  3. Arctic sea ice

    Arctic Ocean likely to become ice-free in the summer for first time before 2050

    The Arctic Ocean is likely to have its first ice-free summer before 2050, according to an analysis of simulations from more than 40 different climate models. How frequently the sea ice vanishes in the summer depends on the rate of greenhouse gas emissions in the future.

    • Climate

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  4. South Asian residents face increasing threat of extreme heat combined with extreme air pollution

    As temperatures warm across much of the globe, how often will people be threatened by extreme heat and extreme air pollution happening at the same time?

    • Air Quality,
    • Climate

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  5. The Polarstern frozen in Arctic sea ice.

    Arctic research expedition likely faces extreme conditions in fast-changing Arctic

    Scientists at the National Center for Atmospheric Research (NCAR) have used an ensemble of multiple climate model runs to simulate conditions along potential routes for the MOSAiC polar expedition, using today’s conditions in the “new Arctic.” The results suggest that thinner sea ice may carry the ship farther than would be expected compared to historical conditions and the sea ice around the ship may melt earlier than the 12-month goal. Of the 30 model runs analyzed in the new study, five (17%) showed melt-out in less than a year.

    • Climate

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