| Identifier | 2020-620-FA | ||||||||||||||
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| Alternate names | Ofu USGS-NPS Study | ||||||||||||||
| Purpose | Investigate geophysical controls on algal outbreaks over NPS coral reefs | ||||||||||||||
| Location | Ofu, American Samoa | ||||||||||||||
| Summary | USGS Thermal Tower Reef Camera Timestack, Papaloloa, Ofu, American Samoa | ||||||||||||||
| Info derived | Investigate geophysical controls on algal outbreaks over NPS coral reefs | ||||||||||||||
| Comments | Entries for this field activity are based on entries from Field Activity 2020-601-FA Data available at doi:10.5066/P19NRBZS | ||||||||||||||
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| Vehicles | None |
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| Itinerary |
Activity events
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| Bounds |
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| Marine operations | Yes | ||||||||||||||
| Scuba operations | Yes |
| Organization |
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
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| Principal investigators | Ferdinand K Oberle | ||||
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| Affiliate principal | Eric Brown (NPS) |
| Data category: | Sampling, Electro-Magnetic, Environmental Data, Imagery |
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| Data type: | Chemistry, Resistivity, Radon, Temperature, Tide, Wave, Other Imagery |
| Equipment | Usage description | Data types | Datasets |
|---|---|---|---|
| sampling equipment | Biology, Chemistry, Geology, Experiments (biological), Sediment Properties | 1 | |
| Supersting R8 | Resistivity | 1 | |
| CT sensor | Conductivity, Temperature | (no data reported) | |
| radonmonitor | Radon | 1 | |
| FLIR thermal camera | Other Imagery | (no data reported) |
| Dataset name | Equipment | Description | Dataset contact |
|---|---|---|---|
| Nearshore Electrical Resistivity Tomography (ERT) profile data, Ofu, American Samoa, February 2020 | Supersting R8 | Along-shore surface-based 2D electrical resistivity tomography (ERT) surveys were collected in the nearshore region of Ofu, American Samoa. | Ferdinand K Oberle |
| Nearshore seawater-column measurements of coastal groundwater discharge, Ofu, American Samoa, February 2020 | radonmonitor | In-situ nearshore seawater measurements of dissolved radon and water level were used to determine the advection rate of groundwater onto the fringing reef off Ofu, American Samoa. | Ferdinand K Oberle |
| Dataset name | Equipment | Description | Dataset contact |
|---|---|---|---|
| Water and algal chemistry measurements collected from the National Park Service's National Park of American Samoa (NPS-NPSA) Ofu Island unit | sampling equipment | Geochemical analysis of coastal springs and possible source waters were conducted in the National Park Service's National Park of American Samoa (NPS-NPSA) Ofu Island unit. Water samples were analyzed for dissolved nutrients, nitrate isotopes (delta-18-O and delta-15-N). Algae samples were collected and analyzed for delta-15-N and delta-13-C values. | Nancy G Prouty |
