However, in a global sense, the magnitude of the observed changes in waves and storm surge over the last 30 years appears too small to have a measurable impact. “Changes in mean sea level due to global warming are expected to result in recession of our coastlines, in many places threatening homes, infrastructure and ecosystems. Ms Ganavati said it is commonly inferred that climate change-induced increases in wind speeds and the ocean waves are impacting global shorelines. However, we saw no evidence in the last 30 years or so of data that the long-term changes in waves and storm surge are directly causing long-term recession of coastlines.” said Professor Young. “Although many shorelines around the world are dynamic, responding to wave and storm surge events, these changes tend to be short to medium term. These changes in shoreline position were compared to changes in wave and storm surge properties along the same coastlines. The compounding effect of climate change driven variations in waves, storm surge and sea level rise is projected to lead to shoreline position change along most of the world’s sandy coasts.Ī team of researchers, led by University of Melbourne PhD candidate Mandana Ganavati and Professor Ian Young, together with colleagues from IHE Delft Institute for Water Education and Deltares of the Netherlands, looked at the changes in shoreline position over the past 30 years globally. Published today in Nature Scientific Reports, the study draws on data from 30 years of global satellite and model studies to investigate whether changes in ocean wave conditions will have an impact on the stability of coastal environments. A new study has assessed whether long-term global changes in waves and storm surges have impacted global coastlines.Ĭhanges in ocean wave and storm conditions have not caused long-term impacts on sandy coastlines in the past 30 years, a new study has found.
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