©2026 Biological and Chemical Oceanography Data Management Office.Funded by the U.S. National Science Foundation
©2026 Biological and Chemical Oceanography Data Management Office.This is a monthly gridded oxygen product for a transect across the Labrador Sea from August 2020 to July 2022, which was designed to calculate oxygen transport across this line. This product is created using a random forest regression trained on data from 60 carefully-calibrated oxygen optodes deployed along this line during this period. This algorithm was validated using both ship CTD and BGC-Argo oxygen profiles. The transect follows the OSNAP West line and provides mean monthly oxygen values across the entire water column.
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60 calibrated and drift-corrected optodes deployed on the OSNAP array (for details on calibration see Miller et al., 2025) were used in this study. These optodes sampled every 15 minutes for the length of the 2-year deployment. Mean daily oxygen values from all 60 optodes spanning the 2-year deployment period (summer 2020-summer 2022) were used in this study. The dataset can be accessed here: https://www.bco-dmo.org/dataset/986667.
The oxygen optodes were deployed with co-located CTD sensors (SBE37 microcats) for the duration of the 2-year deployment as a part of OSNAP. These co-located CTD sensors are used to generate daily and monthly, gap-free, gridded temperature and salinity fields across the OSNAP West and East lines (https://doi.org/10.35090/gatech/70342). OSNAP data were collected and made freely available by the OSNAP (Overturning in the Subpolar North Atlantic Program) project and all the national programs that contribute to it (www.o-snap.org).
Instruments
Oxygen:
Sensor: Aanderaa 4330 optodes integrated with RBR loggers
Oxygen optode dataset: https://www.bco-dmo.org/dataset/986667
CTD (co-located with oxygen optodes): Sensor: SBE37 microcats
CTD (from shipboard profiles): Specifications depend on specific cruise and research vessel. Please see relevant cruise reports for specifics.
BGC-Argo oxygen: Floats are equipped with oxygen optodes. The specific model (i.e. Aanderaa vs. SBE) depends on the float type. Data calibration and processing also depends on the float owner. For additional information see: https://archimer.ifremer.fr/doc/00354/46542/.
Winkler-calibrated CTD oxygen profiles from optode deployment and recovery cruises were used to validate the trained random forest.
AR45
Platform: R/V Neil Armstrong
BCO-DMO: https://www.bco-dmo.org/deployment/933794
Data access: https://www.bco-dmo.org/dataset/933743
AR46
Platform: R/V Neil Armstrong
BCO-DMO: https://www.bco-dmo.org/deployment/904871
Data access: https://www.bco-dmo.org/dataset/904721
AR69-01
Platform: R/V Neil Armstrong
BCO-DMO: https://www.bco-dmo.org/deployment/904879
Data access: https://www.bco-dmo.org/dataset/904721
AR69-03
Platform: R/V Neil Armstrong
BCO-DMO: https://www.bco-dmo.org/deployment/933797
Data access: https://www.bco-dmo.org/dataset/933743
MSM94
Platform: R/V Maria S. Merian
BCO-DMO: https://www.bco-dmo.org/deployment/990149
Data access: https://doi.pangaea.de/10.1594/PANGAEA.963675
M184
Platform: R/V Meteor
BCO-DMO: https://www.bco-dmo.org/deployment/990154
Data access: https://doi.pangaea.de/10.1594/PANGAEA.986330
Monthly versions of temperature and salinity fields
Dataset used for validation: cruise AR-46 (n = 18 profiles) and AR69-01 (n = 14 profiles)
Dataset used for validation: cruise AR-45 (n = 150 profiles) and AR69-03 (n = 113 profiles)
Daily and monthly, gap-free, gridded temperature and salinity fields across the OSNAP West and East lines
Bathymetry data obtained from GEBCO.
Park, E., Nicholson, D. P., Miller, U. K., Palter, J. B. (2026). A monthly gridded oxygen product for a Labrador Sea basin transect from August 2020 to July 2022. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-04-06 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/995975 [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.