Field Activity 2020-601-FA

Identifier 2020-601-FA
Also known as Ofu USGS-NPS Study
Purpose Investigate geophysical controls on algal outbreaks over NPS coral reefs
Location Ofu, American Samoa
Summary 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.
Info derived Investigate geophysical controls on algal outbreaks over NPS coral reefs
Start Ofu, American Samoa 2020-01-27
End Ofu, American Samoa 2020-02-13
Days in the field 15
West 169.6
East 169.7
North -14.2
South -14.1
Marine operations Yes
Scuba operations Yes


2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Ferdinand K Oberle
Crew members
Cordell Johnson
Scientist, Staff
Rachel K Marcuson
Scientist, Staff
Information specialist(s)
Joshua Logan
Specialist, Information
Affiliate principal Eric Brown (NPS)

Data types and categories

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

Equipment used

Equipment Usage description Data types Datasets
Supersting R8 Resistivity (no data reported)
CT sensor Conductivity, Temperature (no data reported)
radonmonitor Radon (no data reported)
current meter Current (no data reported)
wavegauge Wave 1
wave/tide gauge Tide, Wave (no data reported)
FLIR thermal camera Other Imagery (no data reported)
instrumentmooring Mooring (physical oceanography) (no data reported)


Datasets produced in this activity

Dataset name Equipment Description Dataset contact
Rincon, Puerto Rico, wave and water level data, 2020 wavegauge 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 Kurt Rosenberger


Samples collected during this field activity