as_nasa_tutma_vlm Stacey A. Huang Jeanne M. Sauber Richard Ray 20221123 Land subsidence rates across Tutuila and Aunuu are drawn from recent work by Huang et al. (2022) showing that the average rate of subsidence on these islands is spatially variable and ranges from 6 to 9 mm/yr. The study analyzed all available radar data from the European Space Agency (ESA) Sentinel-1 satellite, which covers Tutuila and Aunuu only, and derived an average subsidence rate for the 6-year period between September 2015 to December 2022. Data are available over areas where radar data was successfully used to retrieve unambiguous measurements. Vertical land motion (VLM) measurements are provided by this data layer in millimeters per year (mm/yr), with negative values indicating land subsidence. PacIOOS provides timely, reliable, and accurate ocean information to support a safe, clean, productive ocean and resilient coastal zone in the U.S. Pacific Islands region. -170.84736111329 -170.55930555543 -14.23069444785 -14.37347222677 http://pacioos.org/metadata/browse/as_nasa_tutma_vlm.png Sample image. PNG GCMD Science Keywords Earth Science > Human Dimensions > Natural Hazards > Land Subsidence Earth Science > Land Surface > Geomorphic Landforms/Processes > Coastal Processes > Subsidence Earth Science > Solid Earth > Geomorphic Landforms/Processes > Coastal Processes > Subsidence GCMD Location Keywords Ocean > Pacific Ocean > South Pacific Ocean > Polynesia > American Samoa > Aunuu Ocean > Pacific Ocean > South Pacific Ocean > Polynesia > American Samoa > Tutuila None Use Limitation: The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information. NASA Goddard Space Flight Center (GSFC) Stacey A. Huang physical and mailing

Unknown stacey.a.huang@nasa.gov The Pacific Islands Ocean Observing System (PacIOOS) is funded through the National Oceanic and Atmospheric Administration (NOAA) as a Regional Association within the U.S. Integrated Ocean Observing System (IOOS). PacIOOS is coordinated by the University of Hawaii School of Ocean and Earth Science and Technology (SOEST). Pacific Islands Ocean Observing System (PacIOOS) physical and mailing

Unknown info@pacioos.org Unknown Open Geospatial Consortium Web Feature Service (WFS) https://geo.pacioos.hawaii.edu/geoserver/PACIOOS/as_nasa_tutma_vlm/ows?service=WFS&version=1.0.0&request=GetCapabilities Open Geospatial Consortium Web Map Service (WMS) https://geo.pacioos.hawaii.edu/geoserver/PACIOOS/as_nasa_tutma_vlm/ows?service=WMS&version=1.3.0&request=GetCapabilities GeoServer This URL provides access to this dataset via GeoServer, which offers multiple output formats and an OpenLayers viewer. https://geo.pacioos.hawaii.edu/geoserver/ PacIOOS: American Samoa Sea Level Rise Viewer This URL provides a viewer and/or data access for this dataset. http://pacioos.org/shoreline/slr-amsam/ None specified 20260601 Stacey A. Huang NASA Goddard Space Flight Center (GSFC) mailing and physical Unknown stacey.a.huang@nasa.gov Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata FGDC-STD-012-2002