North Pacific Hydrographic Cruise Data from RV Ryofu Maru
Updated 4mo ago
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Description
Hydrographic data from the RV Ryofu Maru cruise RF18-06 in the north Pacific during August-September 2018 includes water temperature, salinity, dissolved oxygen, nutrients, pH, chlorophyll-a, and current profiles. The dataset, managed by NOAA NCEI as part of the World Data Service for Oceanography, contains measurements from CTD casts, Niskin bottle samples, and vessel-mounted ADCP systems. Observations were collected along the 165E meridian and include samples of floating tar balls.
Use Cases
Analyzing vertical profiles of temperature and salinity along 165E to study water mass structure.
Correlating dissolved oxygen and nutrient concentrations from Niskin bottle samples with phytoplankton pigment data.
Mapping ocean current velocity and direction using ADCP measurements from the vessel-mounted system.
Investigating marine pollution by examining the distribution of sampled floating tar balls.
Strengths
Data collection used industry-standard instruments including a Sea-Bird SBE911plus CTD system and a Teledyne RDI 38kHz ADCP.
Multiple measurement types provide a multi-parameter view of the water column, covering physical, chemical, and biological properties.
The dataset is formally registered under NCEI accession 0175298 and World Ocean Database cruise JP044322, ensuring traceability.
Limitations
The primary data format is PDF, which is not machine-readable without extraction, limiting immediate analysis.
Conflicting last update dates exist between sources (2018-08-20 and 2026-03-05), creating uncertainty about metadata maintenance.
Specific row counts, column names, and dataset size are not provided by any source, obscuring the data's scale and structure.
Provenance
Source
NOAA NCEI / World Data Service for Oceanography
Collection Method
Ship-based measurements using CTD, Niskin bottles, ADCP, and Neuston net sampling.
Time Range
2018-08-18 to 2018-09-30
Freshness
2026-03-05 23:07:27.866221
Geography
North Pacific Ocean along 165E meridian
Data is primarily available in PDF format; computer-readable data must be accessed via NCEI accession 0175298 or the World Ocean Database. The dataset is designated as U.S. State Department MSR U2018-008.