USGS - science for a changing world

USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2020-601-FA

View new CMGDS report form

AKA: Ofu USGS-NPS Study

Other ID: none

Status: Completed

Organization(s): USGS, Pacific Coastal and Marine Science Center

Funding Program(s): Past, Present and Future Coral Reefs (ZP00FRV)

Principal Investigator(s): Ferdinand Oberle

Affiliate Investigator(s): Eric Brown (NPS)

Information Specialist(s): Joshua Logan

Data Type(s): Electro-Magnetic: Resistivity, Environmental Data: Conductivity, Environmental Data: Current, Environmental Data: Radon, Environmental Data: Temperature, Environmental Data: Tide, Environmental Data: Wave, Imagery: Other Imagery, Time Series: Mooring (physical oceanography)

Scientific Purpose/Goals: Investigate geophysical controls on algal outbreaks over NPS coral reefs

Vehicle(s): None

Start Port/Location: Ofu, American Samoa

End Port/Location: Ofu, American Samoa

Start Date: 2020-01-27

End Date: 2020-02-13

Equipment Used: Supersting R8, CT sensor, radonmonitor, current meter, wavegauge, wave/tide gauge, FLIR thermal camera, instrumentmooring

Information to be Derived: Investigate geophysical controls on algal outbreaks over NPS coral reefs

Summary of Activity and Data Gathered: Bottom-mounted oceanographic instrumentation was deployed to monitor tides, waves, current, salinity, and water temperature. Kayak-based CTD tows were performed to map surface salinity and temperature. Water samples were collected for nutrients. Time-series thermal camera towers were deployed to monitor sea-surface temperatures. UAS-based time-series thermal mapping was conducted to map sea-surface temperatures. Electrical resistivity surveys were performed to map groundwater.

Staff: Cordell Johnson, Rachel Marcuson

Affiliate Staff:

Notes:

Location:

Ofu, American Samoa

Boundaries
North: -14.2 South: -14.1 West: 169.6 East: 169.7

Platform(s):


Other

Publications

Rosenberger, K.J., Cheriton, O.M., and Storlazzi, C.D., 2024, Cross-reef wave and water level data from coral reef environments (ver. 3.0, January 2024): U.S. Geological Survey data release, https://doi.org/10.5066/P9RYN5NH.

Portals/Viewers

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
Supersting R8 --- Resistivity
CT sensor --- Conductivity
Temperature
radonmonitor --- Radon
current meter --- Current
wavegauge --- Wave
Rincon, Puerto Rico, wave and water level data, 2020 (Time series data of wave height and water surface elevation were acquired for 135 days at six locations off of the west coast of Rincon, Puerto Rico)
wave/tide gauge --- Tide
Wave
FLIR thermal camera --- Other Imagery
instrumentmooring --- Mooring (physical oceanography)

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
Questions or Comments? Contact CMGDS Team
https://cmgds.marine.usgs.gov