This data set is the CTD data from a research cruise conducted during the summer of 2022 and focused on measuring single cell non-cyanobacterial diazotroph (NCD) N2 fixation rates from a variety of taxa living in well-lit, oxygen-rich coastal and oligotrophic surface waters in the North Pacific Ocean. Determining if NCD activity is an important missing N source in the global oceans has the potential to fill a critical gap in our understanding of the marine N cycle. The project principal investig...
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The NCD cruise steamed northwest of Oahu until ~35oN, then transited west along ~35oN to ~170oE. We then transited S. to ~11oN, targeting frontal zones between mesoscale features based on sea surface heifht anomalies and enhanced chlorophyll features, before returning to Oahu. We had daily CTD casts where we deployed the CTD (<300 m). The CTD had sensors for measuring conductivity (calculated salinity), temperature, depth, beam transmission, beam attebuation photosynthetically active radiation, and fluorescence.
Turk-Kubo, K., Arrigo, K. R., Mills, M. M. (2025) CTD profile data from NCDC research cruise on the R/V Kilo Moana (KM2206) in the Subtropical North Pacific from June 5th to July 5th, 2022. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-07-25 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/969967 [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.