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The Intergovernmental Panel on Climate Change reports that low-lying atolls (ring-shaped islands or island chains made of coral) in the Pacific Ocean are extremely vulnerable to high tide events (“king tides”), storm surge, tsunamis, and sea-level rise. The Republic of the Marshall Islands (RMI) spreads over 29 atolls and has a population of over 50,000 people with homes and communities that may be threatened by these climate change-related events. Policy makers, planners, and others within RMI are faced with decisions about how to prepare for the future and need scientific data and information about the vulnerability of Pacific Islands to potential climate change impacts like sea-level rise. Topographic and bathymetric...
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With an average elevation of just seven feet above sea level, the Republic of the Marshall Islands is acutely vulnerable to inundation from both episodic events such as storm surge and chronic conditions such as sea-level rise. Some projections estimate that future sea-level rise could exceed the average elevation of these islands by 2100. Already, residents are facing extreme high tides and 16 foot swells that flood the islands with saltwater, damaging homes and infrastructure and contaminating the freshwater supply. Land elevation is the primary factor that determines the vulnerability of coastal areas to inundation. This project builds on previous work in which a 1-meter resolution digital elevation model (DEM)...
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The three-dimensional (3D) form of the Earth’s surface results from both abiotic and biotic forces. Major abiotic forces, such as tectonic uplift, erosion, and climate, exert strong influence over land surface morphology. Biotic forces, including, significantly, humans, also shape the landscape, but often at different temporal and spatial scales and magnitudes than geologic forces. Because the processes shaping the land surface, as expressed in its topography, are ongoing, topographic change is ever present and is a factor that must be broadly considered in studies of natural and built environments. Remote sensing data, especially in the form of derived high-resolution measurements of the topography, have been widely...
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In 2010, 39 percent of the U.S.population lived near the coast. This population is expected to increase by 8 percent from 2010 to 2020. Coastal regions are also home to species and habitats that provide critical services to humans, such as wetlands that buffer coasts from storms. Therefore, sea-level rise and the associated changes in coastlines challenge both human communities and ecosystems. Understanding which coastal lands will be vulnerable to sea-level rise is critical for policy makers, land-use planners, and coastal residents. Focusing on the coastal region from Virginia to Maine, researchers examined a range of different possible sea-level rise scenarios, combined with information on features of the coastal...
    map background search result map search result map Evaluating Sea-level Rise Impacts in the Northeastern U.S. Collecting Elevation Data to Understand Climate Change Effects in the Marshall Islands Characterizing Inundation Risk for Majuro Atoll Evaluating Sea-level Rise Impacts in the Northeastern U.S.