Hawaii Ocean Time-series Program at Station ALOHA

Scientists have conducted monthly oceanographic cruises to Station ALOHA, 100 km north of Oahu, Hawaii, since October 1988. The Hawaii Ocean Time-series (HOT) program collects measurements of thermohaline structure, water chemistry, currents, optical properties, primary production, plankton community structure, and particle export rates. This long-term dataset is managed by the OB_DAAC and is designed to characterize the North Pacific subtropical gyre.

Use Cases

• Analyzing long-term trends in ocean temperature and salinity (thermohaline structure) at a fixed location.
• Studying the relationship between primary production, plankton community structure, and nutrient chemistry over decades.
• Investigating seasonal and interannual variability in particle export fluxes and optical water properties.
• Modeling carbon cycling and ecosystem responses in an oligotrophic (nutrient-poor) ocean habitat.

Strengths

• Provides over 35 years of consistent monthly observations since October 1988, offering a rare long-term perspective.
• Measures a multi-disciplinary suite of variables including physics (currents), chemistry, and biology on each cruise.
• Focuses on a well-defined and representative site (Station ALOHA) in the North Pacific subtropical gyre.

Limitations

• Specific row counts, file sizes, and a complete column list are unavailable from the provided sources.
• License information conflicts between sources, listed as 'other-license-specified' on some platforms and 'None' on others.

Provenance

Source

OB_DAAC (Ocean Biology Distributed Active Archive Center)

Collection Method

Monthly research cruises with direct instrument measurements and sample collection.

Time Range

1988-10 to present

Freshness

2026-03-13 01:43:12.177506

Geography

Station ALOHA (22.75°N, 158°W), North Pacific Ocean, 100 km north of Oahu, Hawaii.