Dataset: Niskin bottle water samples and associated CTD measurements from the Hawaii Ocean Time-Series cruises from 1988-2023

ValidatedFinal with updates expectedDOI: 10.26008/1912/bco-dmo.3773.3Version 3 (2025-04-22)Dataset Type:Cruise Results

Principal Investigator: Angelicque E. White (University of Hawaiʻi at Mānoa)

Co-Principal Investigator: David M. Karl (University of Hawaiʻi at Mānoa)

Contact, Data Manager: Lance A Fujieki (University of Hawaiʻi at Mānoa)

BCO-DMO Data Manager: Dana Stuart Gerlach (Woods Hole Oceanographic Institution)

Program: Ocean Carbon and Biogeochemistry (OCB)

Program: U.S. Joint Global Ocean Flux Study (U.S. JGOFS)

Program: Ocean Time-series Sites (Ocean Time-series)

Project: [Current] Hawaii Ocean Time-series (HOT): 2023-2028; [Previous] Hawaii Ocean Time-series (HOT): Sustaining ocean ecosystem and climate observations in the North Pacific Subtropical Gyre (HOT)

Abstract

Monthly measurements of the thermohaline structure, water column chemistry, and primary production were collected at station ALOHA as part of the Hawaii Ocean Time-series (HOT) program. This dataset presents biogoeochemical data from water samples collected on cruises HOT-001 through HOT-348 from October 1988 through December 2023.

Cite Dataset

Water samples for a variety of chemical and biological measurements are routinely collected from the surface to within 10 meters of the seafloor. To the extent possible, we collect samples for complementary biogeochemical measurements from the same or from contiguous casts to minimize aliasing caused by time-dependent changes in the density field. This approach is especially important for samples collected in the upper 350 m of the water column. 

Furthermore, we attempt to sample from common depths and specific density horizons each month to facilitate comparisons between cruises. Water samples for salinity determinations are collected from every water bottle to identify sampling errors. Approximately 20% of the water samples are collected and analyzed in duplicate or triplicate to assess and track our precision in sample analyses.

 

Related Datasets

IsSourceOf
Dataset: Synthesis Product for Ocean Time Series (SPOTS)
Relationship Description: HOT Station ALOHA data was used in the compilation for the time-series data synthesis product
Lange, N., Fiedler, B., Álvarez, M., Benoit-Cattin, A., Benway, H., Buttigieg, P. L., Coppola, L., Currie, K. I., Flecha, S., Gerlach, D. S., Honda, M. C., Huertas, E. I., Kinkade, D., Muller-Karger, F., Lauvset, S. K., Körtzinger, A., O'Brien, K. M., Ólafsdóttir, S., Pacheco, F. C., Rueda-Roa, D., Skjelvan, I., Wakita, M., White, A. E., Tanhua, T. (2024) Synthesis Product for Ocean Time Series (SPOTS). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2) Version Date 2024-02-22 doi:10.26008/1912/bco-dmo.896862.2

Related Publications

Methods
Campbell, L., Nolla, H. A., & Vaulot, D. (1994). The importance of Prochlorococcus to community structure in the central North Pacific Ocean. Limnology and Oceanography, 39(4), 954–961. doi:10.4319/lo.1994.39.4.0954
Methods
Clayton, T. D., & Byrne, R. H. (1993). Spectrophotometric seawater pH measurements: total hydrogen ion concentration scale calibration of m-cresol purple and at-sea results. Deep Sea Research Part I: Oceanographic Research Papers, 40(10), 2115–2129. doi:10.1016/0967-0637(93)90048-8
Methods
DelValls, T. A., & Dickson, A. G. (1998). The pH of buffers based on 2-amino-2-hydroxymethyl-1,3-propanediol (‘tris’) in synthetic sea water. Deep Sea Research Part I: Oceanographic Research Papers, 45(9), 1541–1554. https://doi.org/10.1016/s0967-0637(98)00019-3
Methods
HOT: Analytical Methods and Protocols. Hawaii Ocean Time-series (HOT). Accessed 22-April-2025
Methods
HOT: Sensor Correction & Calibration. https://hahana.soest.hawaii.edu/hot/methods/sensors.html. Accessed 24 Mar. 2025.

White, A. E., Karl, D. M., Fujieki, L. A. (2025) Niskin bottle water samples and associated CTD measurements from the Hawaii Ocean Time-Series cruises from 1988-2023. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 3) Version Date 2025-04-22 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.3773.3 [access date]

Terms of Use

This dataset is licensed under Creative Commons Attribution 4.0.


If you wish to use this dataset, it is highly recommended that you contact the original principal investigators (PI). Should the relevant PI be unavailable, please contact BCO-DMO (info@bco-dmo.org) for additional guidance. For general guidance please see the BCO-DMO Terms of Use document.

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Funded by the U.S. National Science Foundation