PARIS, France – Global warming could drive a much more dramatic increase in sea levels than current projections suggest, scientists say, citing a rise of 10 meters during Earth's last warming interlude more than 100,000 years ago.
Over the last million years, Earth has alternated between roughly 100,000-year-long cold periods -- ice ages -- and shorter, temperate spells such as the last 11,500 years, known as the Holocene. "Greenhouse gas emissions over the past 200 years have caused climate changes that are faster and more extreme than experienced during the last interglacial," the scientists noted."This means past rates of sea level rise provide only low-end predictions of what might happen in the future."
Current estimates project sea levels will rise 70-100 centimeters by 2100, depending on greenhouse gas emission rates over the next several decades. "Temperatures during the last interglacial were similar to those projected in the near future which means melting polar ice sheets will likely affect future sea levels far more dramatically than anticipated to date."
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