Arctic Ocean Water Chemistry Profiles from 2017 Research Cruise
Updated 8y ago
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Description
410 nutrient samples and 71 chlorophyll profiles were collected from 141 CTD casts during a 2017 research cruise in the Bering and Chukchi Seas. The dataset, submitted by NOAA's Pacific Marine Environmental Laboratory, includes concentrations of nitrate, nitrite, ammonium, silicate, and phosphate. Sampling occurred from August 26 to September 15, 2017, along standard Distributed Biological Observatory transect lines.
Use Cases
Model phytoplankton biomass by correlating chlorophyll concentrations from surface to 50m depths with nutrient levels like silicate and phosphate.
Analyze spatial gradients in the nitrogen cycle by mapping nitrate, nitrite, and ammonium concentrations across the 141 CTD cast locations.
Calibrate CTD sensor oxygen readings using the 48 discrete dissolved oxygen samples collected for that purpose.
Study benthic-pelagic coupling by examining nutrient sample data collected in support of seafloor studies at all process stations.
Strengths
Substantial sample size with 410 nutrient analyses and 71 chlorophyll depth profiles.
Samples were collected following a standardized protocol at depths of surface, 10m, 20m, 30m, 40m, and 50m.
Data is georeferenced across established ecological transect lines (DBO areas 1, 3, 4, and 5) in the Pacific Arctic.
Limitations
Temporal coverage is limited to a single three-week cruise in late summer 2017.
Sample preservation at -80°C and post-cruise analysis could introduce handling artifacts not documented in the summary.
The dataset is a discrete snapshot; related continuous CTD profile data is stored in a separate repository (WHOI).
Provenance
Source
NOAA Pacific Marine Environmental Laboratory (PMEL), submitted via NCEI.
Collection Method
Discrete water samples collected from 141 Conductivity-Temperature-Depth (CTD) casts, filtered, frozen, and analyzed post-cruise.
Time Range
2017-08-26 to 2017-09-15
Freshness
null
Geography
Bering Sea, Chukchi Sea, and Arctic Ocean along DBO-NCIS transect lines.
Related continuous CTD instrument profile data is available from a different source (WHOI). Data format is CSV with a 1-line header, but specific column names are not provided in the metadata.