Buoy NH-10: Near-Bottom Ocean Chemistry Time Series

Buoy NH-10 off Newport, Oregon, collected a four-year time series of near-bottom ocean chemistry. Measurements include partial pressure of carbon dioxide, pH, dissolved oxygen, temperature, and salinity, targeting ocean acidification research. The data originates from NOAA's Ocean Acidification Program and is archived in the Ocean Carbon and Acidification Data System.

Use Cases

• Tracking coastal ocean acidification trends based on pCO2 and pH time series
• Studying the relationship between dissolved oxygen and carbon dioxide in near-bottom waters
• Validating biogeochemical models using in-situ sensor data from a fixed buoy location
• Assessing seasonal and interannual variability in coastal carbonate chemistry

Strengths

• Provides a continuous four-year time series from 2011-08-16 to 2015-08-25
• Includes multiple co-located chemical and physical parameters (pCO2, pH, O2, temperature, salinity)
• Archived by NOAA NCEI and accessible via NASA Earthdata and Data.gov, indicating high curation standards

Limitations

• Column names and data structure are not detailed in any source description
• Conflicting last-update timestamps (2015 vs. 2026) suggest metadata inconsistencies across platforms
• Limited spatial coverage to a single buoy location (~80m depth at NH-10)

Provenance

Source

NOAA National Centers for Environmental Information (NCEI)

Collection Method

Time series observations from SAMI-CO2 and SAMI-pH instruments deployed on Buoy NH-10

Time Range

2011-08-16 to 2015-08-25

Freshness

2026-03-05 23:34:37.411481 (most recent update, though data collection ended in 2015)

Geography

Buoy NH-10 off the coast of Newport, Oregon, United States, at near-bottom depth (~80 meters)