"The combination of the moon's gravitational pull, rising sea levels and climate change will continue to exacerbate coastal flooding on our coastlines and across the world." Coastal cities have already started to act, but dramatic flooding is coming faster than many once thought "Low-lying areas near sea level are increasingly at risk and suffering due to the increased flooding, and it will only get worse," NASA Administrator Bill Nelson said. Floods, the study predicts, could also start occurring in "clusters" that last a month or longer, depending on how the sun, moon and Earth are positioned, according to NASA. But the study shows that high tides will exceed flooding thresholds more often. The National Oceanic and Atmospheric Administration reported continued record-setting high tide, or sunny day, flooding in 2019. High tides already exceed known flooding thresholds around the United States. "The same variability in the past that didn't cause flooding is now going to cause flooding." "We're getting closer and closer to the flooding thresholds or tipping point in these coastal locations," he said. Half of the moon's 18.6-year cycle creates lower high tides and higher low tides the other creates higher high tides and even lower low tides.īut NASA says global sea level rise will likely push those high tides higher, and one of the study's co-authors, NASA Sea Level Change Team leader Ben Hamlington, said that because waters will be higher, this moon cycle could have a much more dramatic effect. The moon's orbit is due for its regular "wobble." That is entirely natural, NASA says, and it has been recorded as far back as 1728. Two factors could converge to worsen flooding at high tide, the study says: rising sea levels fueled by climate change - and the moon. Flooding at high tide, often called nuisance flooding, already occurs with regularity in many coastal communities as water routinely sloshes into streets, yards and businesses. Led by members of the NASA Sea Level Change Team from the University of Hawaii, the study says that high tide flooding could happen more frequently on several U.S.
coastal regions - and it could stay that way for an entire decade. A new study predicts that high tide flooding in coastal areas could increase in frequency because of climate change and the lunar cycle in the mid-2030s.Ī new study on high tide flooding predicts that the mid-2030s could be catastrophically wet in U.S. A woman drives through floodwater during heavy rainfall in Miami.
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