For NASA’s Earth Observatory, Lindsey Doermann writes about new research showing that our oceans are turning more green. Caused by growth of phytoplankton, this shift was predicted by climate-change models, although researchers can’t yet pinpoint the specific ecological factors causing the change. Doermann explains how researchers worked with data captured by a NASA satellite to detect the change over a period of only 20 years, using a new method measuring all visible light. Image: Public domain / NASA
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