U.S. coastlines will face increasing flooding in the mid-2030s thanks to a regular lunar cycle that will magnify rising sea levels caused by climate change, according to research led by NASA scientists.
A key factor identified by the scientists is a regular "wobble" in the moon's orbit - first identified in the 18th century - that takes 18.6 years to complete. The moon's gravitational pull helps drive Earth's tides.
The expected flooding will result from the combination of the continuing sea level rise associated with climate change and the arrival of an amplification part of the lunar cycle in the mid-2030s, the researchers said. "This effect from the moon causes the tides to vary, so what we found is that this effect lines up with the underlying sea level rise, and that will cause flooding specifically in that time period from 2030 to 2040," Hamlington said.
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