AdvertisementWhile most people are familiar with the regular cycles of lunar phases, which last roughly one month, the Moon’s nodal cycle is a bit more esoteric. During one half of the cycle, this wobbling effect takes the edge off of both tidal extremes by making high tides lower and low tides higher. In the other half of the cycle, the Moon’s precession amplifies both extremes, making high tides higher and low tides lower. “Nodal cycle modulations of tidal amplitude will suppress sea-level-rise-induced increases in high-tide flooding during certain periods and may delay the onset of environmental adaptation triggers,” the team said. “Just as engineers and coastal planners are accustomed to planning for rare, large-amplitude extreme events, adaptation and mitigation strategies focused on high-tide flooding should account for brief periods experiencing an extreme number of high-tide flooding days,” the team concluded.