Aua Reef Water Chemistry and Nutrient Data from 18 Sites in American Samoa, September 2022

Five seawater samples were collected at each of 18 sites across a known water quality gradient on Aua Reef in American Samoa from September 8-29, 2022. The samples were analyzed for chlorophyll-a, dissolved nitrogen compounds, dissolved phosphorus compounds, silicate, total suspended solids, and pH. This data was collected by NOAA divers and processed by the University of Hawaii at Manoa's SOEST S-Lab as part of a NOAA CRCP-funded mission.

Use Cases

• Modeling water quality gradients based on nutrient concentrations mentioned in the description
• Analyzing relationships between chlorophyll-a levels and other water chemistry parameters
• Assessing nutrient pollution impacts on coral reef ecosystems
• Calibrating remote sensing models for coastal water quality using in-situ chemistry data

Strengths

• Data was collected across 18 sites along a known environmental gradient, providing spatial context
• Analysis includes multiple key nutrient parameters (e.g., nitrogen, phosphorus, silicate) and chlorophyll-a
• Samples were processed by a specialized laboratory (SOEST S-Lab), suggesting standardized methods

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment for large-scale modeling
• Data may reflect geographic and temporal bias inherent to a single, short-term mission

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Field collection of seawater samples by NOAA divers, with laboratory analysis at the University of Hawaii at Manoa's SOEST S-Lab.

Time Range

2022-09-08 to 2022-09-29

Freshness

Last updated 2026-03-14 23:00:10.526859; freshness should be verified

Geography

Aua Reef, American Samoa, Central Pacific Ocean