Deep Ocean CTD Measurements from the Aloha Cabled Observatory 2011-2013

CTD data from a SeaBird SBE-37 Microcat sensor deployed at a depth of 5 kilometers near Station ALOHA, north of Oahu, Hawaii. The dataset contains rapidly sampled measurements of conductivity, temperature, and pressure from 2011 to 2013, collected by the NOAA National Centers for Environmental Information. Sampling rates changed from 1 minute to 1 second and then to 2 seconds during the deployment.

Use Cases

• Analyze temporal trends in deep-ocean temperature and salinity from 2011-2013 to study water mass stability.
• Calibrate oceanographic models using high-frequency pressure and conductivity measurements at a fixed 5km depth location.
• Investigate sensor performance and data consistency across different sampling intervals (1-minute, 1-second, 2-second).

Strengths

• Data collected from a fixed, cabled observatory enabling sustained real-time observations at 5km depth.
• High temporal resolution with sampling rates as frequent as 1 second for detailed time-series analysis.

Limitations

• Limited temporal coverage (2011-2013) with data from later years noted as separate.
• Geographic scope is restricted to a single location near Station ALOHA.
• Specific row counts, file sizes, and complete column details are unknown.

Provenance

Source

NOAA National Centers for Environmental Information (NCEI Accession 0123115).

Collection Method

Measured by a SeaBird SBE-37 Microcat CTD sensor on the Aloha Cabled Observatory seafloor junction box.

Time Range

2011 to 2013.

Freshness

Data collection ended in 2013; the dataset is a historical snapshot.

Geography

Deep ocean near Station ALOHA, approximately 100 km north of Oahu, Hawaii at ~5km depth.