Vertical Land Motion - Tutuila and Aunuu, American Samoa

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.

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Metadata Date

2024-08-06

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Distributor NASA Goddard Space Flight Center (GSFC)
Point of Contact Stacey A. Huang
NASA Goddard Space Flight Center (GSFC)
stacey.a.huang@nasa.gov
Online Resource
Originator Stacey A. Huang
NASA Goddard Space Flight Center (GSFC)
stacey.a.huang@nasa.gov
Online Resource
Originator Jeanne M. Sauber
NASA Goddard Space Flight Center (GSFC)
jeanne.m.sauber-rosenberg@nasa.gov
Online Resource
Originator Richard Ray
NASA Goddard Space Flight Center (GSFC)
richard.d.ray@nasa.gov
Online Resource
Publisher Pacific Islands Ocean Observing System (PacIOOS)
info@pacioos.org
Online Resource
Dataset Point of Contact Pacific Islands Ocean Observing System (PacIOOS)
info@pacioos.org
General Documentation
Associated Documentation Pacific Islands Ocean Observing System (PacIOOS)
Date(s) creation: 2022-11-23
issued: 2022-11-23
revision: 2022-11-23
creation: 2022-11-23
issued: 2022-11-23
revision: 2022-11-23
creation: 2022-11-23
issued: 2022-11-23
revision: 2022-11-23
creation: 2022-11-23
issued: 2022-11-23
revision: 2022-11-23
Purpose 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.
Use Limitations 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.
Spatial Bounding Box Coordinates N: -14.23069444785° S: -14.37347222677° E: -170.55930555543° W: -170.84736111329°
Theme keywords 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
Data Center keywords GCMD Data Center Keywords
  • PacIOOS > Pacific Islands Ocean Observing System
Place keywords GCMD Location Keywords
  • Ocean > Pacific Ocean > South Pacific Ocean > Polynesia > American Samoa > Aunuu
  • Ocean > Pacific Ocean > South Pacific Ocean > Polynesia > American Samoa > Tutuila
Project keywords GCMD Project Keywords
  • PacIOOS > Pacific Islands Ocean Observing System
Use Constraints 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.
Lineage Statement 2022-11-23T00:00:00Z Data first published as part of Geophysical Research Letters publication https://doi.org/10.1029/2022GL101363. 2023-11-27T00:00:00Z Data published in PacIOOS GeoServer for use by the American Samoa Sea Level Rise Viewer.
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