The impacts of climate change and sea-level rise around the Pacific and Arctic Oceans can vary tremendously. Thus far the vast majority of national and international impact assessments and models of coastal climate change have focused on low-relief coastlines that are not near seismically active zones. Furthermore, the degree to which extreme waves and wind will add further stress to coastal systems has also been largely disregarded. By working to refine this area of research, USGS aims to help coastal managers and inhabitants understand how their coasts will change.
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The Arctic region is warming faster than anywhere else in the nation. Understanding the rates and causes of coastal change in Alaska is needed to identify and mitigate hazards that might affect people and animals that call Alaska home.
Sea level is rising faster than projected in the western Pacific, so understanding how wave-driven coastal flooding will affect inhabited, low-lying islands—most notably, the familiar ring-shaped atolls—as well as the low-elevation areas of high islands in the Pacific Ocean, is critical for decision-makers in protecting infrastructure or relocating resources and people.
The west coast of the United States is extremely complex and changeable because of tectonic activity, mountain building, and land subsidence. These active environments pose a major challenge for accurately assessing climate change impacts, since models were historically developed for more passive sandy coasts.
Essential habitat for wild salmon and other wildlife borders river deltas and estuaries in the Pacific Northwest. These estuaries also support industry, agriculture, and a large human population that’s expected to double by the year 2060, but each could suffer from more severe river floods, higher sea level, and storm surges caused by climate change.
For a beach town like Santa Cruz, preserving beaches by mitigating coastal erosion is vital. Surveys conducted now and regularly in the future will help scientists understand the short- and long-term impacts of climate change, El Niño years, and sea-level rise on a populated and vulnerable coastline.
Coastal flooding will double in decades due to sea-level rise -
PCMSC News, May 2017
Study forecasting erosion of southern California beaches draws widespread media attention -
PCMSC News, April 2017
Disappearing Beaches: Modeling Shoreline Change in Southern California -
USGS Newsroom, March 2017
Doubling of coastal flooding frequency within decades due to sea-level rise
Scientific Reports v. 7
Land-use change and managed aquifer recharge effects on the hydrogeochemistry of two contrasting atoll island aquifers, Roi-Namur Island, Republic of the Marshall Islands -
Applied Geochemistry v.80
Can beaches survive climate change? -
Journal of Geophysical Research: Earth Surface v.122
A model integrating longshore and cross-shore processes for predicting long-term shoreline response to climate change - Journal of Geophysical Research: Earth Surface v.122
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