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Introduction The National Science Foundation Ocean Observatories Initiative (OOI) collects continuous in-situ measurements of dissolved oxygen (DO) on the Endurance Array moorings in the inner shelf region of the Oregon and Washington coasts. Aanderaa Optode 4831 oxygen sensors were deployed at 7 meters depth on the near surface instrument frame (NSIF) and on the collocated coastal surface piercing profiler (CSPP) moorings. The sensors suffer from calibration drift due to biofouling, which can cause a dramatic increase in DO during daylight hours and corresponding decrease at night compared to the conditions in the water column (Palevsky et al., 2023). This enhanced diel signal, when present, is much more pronounced on fixed-depth sensors and usually begins to occur 1-2 months after a mooring is deployed. After this biofouling issue was identified, OOI began deploying UV lamps adjacent to the oxygen sensor in spring 2018, after which there was substantial improvement in DO data quality. Each file in this dataset contains the measured near surface DO and the corrected near surface DO at the Oregon and Washington inner shelf surface moorings (ISSM) with gaps from periods of biofouling replaced with the DO measured by the CSPP. Methods OOI oxygen data Dissolved oxygen sensors on OOI CSPPs and at fixed-depths on moorings are named “DOSTA”, a contraction of DO Stable Response. The DOSTA data are downloaded on a deployment-by-deployment basis for all available data streams (telemetered and recovered for fixed-depth moorings; recovered only for CSPPs) from the OOI Gold Copy THREDDs catalog. Each deployment file additionally contains the practical salinity, seawater temperature, and pressure measured by the collocated CTD. The telemetered and recovered data streams are combined and interpolated to a common timebase with one-minute resolution. Evaluate fixed-depth oxygen data The NSIF DO data are quality-controlled using both automated and manual methods to create flags that follow the Quality Assurance of Real-Time Oceanographic Data (QARTOD) standards. Endurance array team members perform a visual inspection of oxygen and ancillary data from each deployment to determine instrument failure from biofouling or other issues. Annotations from human-in-the-loop analyses of failed or suspect data generate the QARTOD flags. Merge profiler oxygen data QARTOD flags are applied to the CSPP data to omit failed data points. CSPP DO data are averaged from 2-7 meters depth then interpolated to the one-minute timebase. The resulting CSPP time series shows good agreement with the NSIF during data overlaps. Finally, the NSIF DO data is replaced with the CSPP DO data during periods of biofouling or instrument failure, flags are generated for the hybrid DO dataset, and separate netCDF files are created for the Oregon and Washington locations. Files Filename: CE01ISSM-NSIF-DOSTA.nc Description Oregon Coastal Endurance Site CE01, Inner Shelf Surface Mooring, Near Surface Instrument Frame, Dissolved Oxygen Stable Response Geographic Range Latitude: 44.6598 to 44.6598 Longitude: -124.095 to -124.095 Time Range Start: 2014-10-10, 18:00:00 UTC End: 2025-06-24, 20:00:00 UTC Variables: "time", ”depth”, "sea_water_practical_salinity", "sea_water_practical_salinity_qartod_results", "sea_water_temperature", "sea_water_temperature_qartod_results", "measured_dissolved_oxygen", "measured_dissolved_oxygen_qartod_results", "corrected_dissolved_oxygen", "corrected_dissolved_oxygen_qartod_results" Filename: CE06ISSM-NSIF-DOSTA.nc Description Washington Coastal Endurance Site CE06, Inner Shelf Surface Mooring, Near Surface Instrument Frame, Dissolved Oxygen Stable Response Geographic Range Latitude: 47.1336 to 47.1336 Longitude: -124.272 to -124.272 Time Range Start: 2015-04-10, 05:00:00 UTC End: 2025-06-24, 20:00:00 UTC Variables: "time", ”depth”, "sea_water_practical_salinity", "sea_water_practical_salinity_qartod_results", "sea_water_temperature", "sea_water_temperature_qartod_results", "measured_dissolved_oxygen", "measured_dissolved_oxygen_qartod_results", "corrected_dissolved_oxygen", "corrected_dissolved_oxygen_qartod_results"
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Gridded hydrography and bulk air-sea interactions observed by the Ocean Observatory Initiative (OOI) Coastal Pioneer New England Shelf Mooring Array (2015-2022)
The Ocean Observatories Initiative (OOI) Coastal Pioneer Mooring Array recorded hydrographic, meteorological, and bulk air-sea flux variables at a variety of moorings across the Southern New England shelfbreak front between late 2014 and November 2022. Here, we provide low-level quality-controlled one- to two-dimensional time series datasets from all OOI Coastal Pioneer Moorings on a uniform spatio-temporal grid, covering the timeframe 2015-01-01 to 2022-06-01. Hydrography data (temperature T, salinity S, pressure P, and potential density (p=0)) is either provided as i) one-dimensional time series or ii) two-dimensional pressure-time data series: i) The static surface buoys, near-surface instrument frames (NSIF), and multi-function bottom nodes (MFBN) of all three surface moorings cover the surface and bottom boundary layer, respectively, and lead to one-dimensional time series at roughly constant pressure levels. ii) The mid-range water column is covered by the Array’s profiler moorings leading to interpolated two-dimensional data varying across pressure and time. Meteorological variables (wind at 3m height, sea level pressure, sea surface humidity, shortwave and longwave radiation, and precipitation) are measured by the three surface buoys. Remaining air-sea buoyancy fluxes are inferred from bulk formulae using COARE3.5 (Edson et al., 2013). The input data is published on the OOI Data Explorer ERDDAP server (erddap.dataexplorer.oceanobservatories.org) and publicly available for download. The Ocean Observatory Initiative (OOI) is a major facility fully funded by the National Science Foundation (NSF) under Cooperative Agreement No. 1743430 and comes with its own conditions for data usage (https://oceanobservatories.org/wp-content/uploads/2022/12/1102-00020_Data_User_Terms_Conditions_OOI_2019-01-02_Ver_2-00.pdf; May 13, 2022).
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- Award ID(s):
- 2244833
- PAR ID:
- 10627724
- Publisher / Repository:
- Woods Hole Oceanographic Institution
- Date Published:
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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