Long Island Sound CTD Profiles for Hypoxia Study

Moored CTD profilers collected high-frequency physical profile data at two sites in Long Island Sound. The dataset comprises five deployments across Central and Eastern sites from April 2002 to September 2003. It was produced by the National Oceanic and Atmospheric Administration using Brooke Ocean Technology Seahorse profilers with Seabird CTD and oxygen sensors.

Use Cases

• Analyzing temporal patterns of temperature, salinity, and dissolved oxygen to study hypoxia events.
• Calibrating and validating regional hydrodynamic or water quality models using high-frequency profile data.
• Investigating the vertical structure of the water column and its seasonal variability at fixed mooring sites.
• Assessing the performance of wave-driven CTD profiler technology for autonomous coastal monitoring.

Strengths

• Data was collected at a high sampling frequency of 4Hz during ascents, providing detailed vertical resolution.
• Includes five distinct deployments over multiple seasons (Spring and Fall) across two geographic sites, allowing for spatiotemporal analysis.
• Sensor specifications are well-documented, using a Seabird pumped CTD system (911 plus) and a Model 43 oxygen sensor.

Limitations

• The exact row count, file size, and specific column names are not provided by any source, limiting precise data assessment.
• Sources conflict on the 'last updated' date, with one platform listing 2003-09-06 and another listing a future date of 2026-04-01, creating uncertainty about metadata currency.
• Deployment durations were relatively short, ranging from about 2 to 10 weeks, which may limit analysis of long-term trends.

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Data collected via moored Brooke Ocean Technology Seahorse wave-driven profilers with Seabird CTD and oxygen sensors, performing free ascents nominally once per hour.

Time Range

18 April 2002 to 6 September 2003

Freshness

2003-09-06 00:00:00

Geography

Central and Eastern Long Island Sound