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Every coast in the U.S. is facing rapidly increasing high tide floods thanks to a "wobble" in the moon's orbit working in tandem with climate change-fueled rising sea levels.
A new study from NASA and the University of Hawaii, published recently in the journal Nature Climate Change, warns that upcoming changes in the moon's orbit could lead to record flooding on Earth in the next decade.
Through mapping the National Oceanic and Atmospheric Administration's (NOAA) sea-level rise scenarios, flooding thresholds and astronomical cycles, researchers found flooding in American coastal cities could be several multiples worse in the 2030s, when the next moon "wobble" is expected to begin. They expect the flooding to significantly damage infrastructure and displace communities.
While the study highlights the dire situation facing coastal cities, the lunar wobble is actually a natural occurrence, first reported in 1728. The moon's orbit is responsible for periods of both higher and lower tides about every 18.6 years, and they aren't dangerous in their own right.
"In half of the Moon's 18.6-year cycle, Earth's regular daily tides are suppressed: High tides are lower than normal, and low tides are higher than normal," NASA explains. "In the other half of the cycle, tides are amplified: High tides get higher, and low tides get lower. Global sea-level rise pushes high tides in only one direction – higher. So half of the 18.6-year lunar cycle counteracts the effect of sea-level rise on high tides, and the other half increases the effect."
But this time around, scientists are more concerned. With sea-level rise due to climate change, the next high tide floods are expected to be more intense and more frequent than ever before, exacerbating already grim predictions.
www.cbsnews.com
A new study from NASA and the University of Hawaii, published recently in the journal Nature Climate Change, warns that upcoming changes in the moon's orbit could lead to record flooding on Earth in the next decade.
Through mapping the National Oceanic and Atmospheric Administration's (NOAA) sea-level rise scenarios, flooding thresholds and astronomical cycles, researchers found flooding in American coastal cities could be several multiples worse in the 2030s, when the next moon "wobble" is expected to begin. They expect the flooding to significantly damage infrastructure and displace communities.
While the study highlights the dire situation facing coastal cities, the lunar wobble is actually a natural occurrence, first reported in 1728. The moon's orbit is responsible for periods of both higher and lower tides about every 18.6 years, and they aren't dangerous in their own right.
"In half of the Moon's 18.6-year cycle, Earth's regular daily tides are suppressed: High tides are lower than normal, and low tides are higher than normal," NASA explains. "In the other half of the cycle, tides are amplified: High tides get higher, and low tides get lower. Global sea-level rise pushes high tides in only one direction – higher. So half of the 18.6-year lunar cycle counteracts the effect of sea-level rise on high tides, and the other half increases the effect."
But this time around, scientists are more concerned. With sea-level rise due to climate change, the next high tide floods are expected to be more intense and more frequent than ever before, exacerbating already grim predictions.
NASA: Moon "wobble" in orbit may lead to record flooding on Earth
A wobble in the moon's orbit will raise high tides even higher, exacerbating the devastating effects of sea-level rise.
www.cbsnews.com
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