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Time series of data corresponding to Evans et al. (2022) "Natural variability and expansion of the nitrogen deficit within the Eastern Tropical North Pacific Oxygen Deficient Zone", containing secondary quality controlled data of 8 cruises in the ETNP ODZ, seven of which on the 110 W line, as well as supplemental sediment core data and CalCOFI oxygen data for comparison. Intermediate data products generated by the code used for this paper are also included, and the code to generate these intermediate products as well as the final outputs has been uploaded onto a separate Zenodo repository, "ETNP_ODZ_time_series_code" at https://doi.org/10.5281/zenodo.6519316. More detailed information is available in the README, but should you have any questions, please reach out to Allan Devol or Natalya Evans.

Risk Registers for major subsystems of the StingRAY WEC completed in compliance with the DOE Risk Management Framework developed by NREL.

The samples were concentrated down to 50 cm**3 by slow decantation after storage for 20 days in a cool and dark place. The species identification was done under light microscope OLIMPUS–BS41 connected to a video-interactive image analysis system at magnification of the ocular 10X and objective – 40X. A Sedgwick-Rafter camera (1ml) was used for counting. 400 specimen were counted for each sample, while rare and large species were checked in the whole sample (Manual of phytoplankton, 2005). Species identification was mainly after Carmelo T. (1997) and Fukuyo, Y. (2000).Taxon-specific phytoplankton abundance and biomass were analysed by Moncheva S., B. Parr, 2005. Manual for Phytoplankton Sampling and Analysis in the Black Sea.The cell biovolume was determined based on morpho-metric measurement of phytoplankton units and the corresponding geometric shapes as described in detail in (Edier, 1979).

The data set has been processed and contains quality flags for different kinds for erroneous data. Flag values are the sum of individual error codes. The value of 0 refers to no error. Quality flag, position: The geographic position is flagged +1 if the drift velocity, as derived from the GPS longitude and latitude, exceeds a threshold of 10 deg latitude or 50 deg longitude per time step; +2 if the position exceeds extreme values, such as longitude > 360 deg; +4 if the position is exactly 0.0. Solar radiation over and under sea ice was measured by radiation station 2014R4, an autonomous platform, installed on drifting Multi-Year-Ice (MYI) in the Arctic Ocean during Oden_AO18. Along with the radiation measurements, this autonomous platform consisted of thermistor chain with 208 sensors, measuring tempeature and heating-induced temperature differences.

These data were produced in two lab assays. The first assay was conducted in the period from August 29 to September 10, during which filtration and respiration of 18 mussels transplanted and grown for ca. four months under thermal history levels of + 0 °C and + 4 °C (using Kiel Outdoor Benthocosms, KOBs) were recorded in six temporally replicated (independent) trials using the Fluorometer and Oximeter-equipped Flow-through Setup (FOFS; Vajedsamiei et al., 2021). In each trial, filtration and respiration of three different transplants, randomly selected from the incubated samples were recorded in response to a constant mild temperature condition (20.8 °C) followed by two 24 h thermal fluctuation cycles. In the second assay, we recorded filtration and respiration rates of six batches of 5 or 6 mussels recruited and grown under the same thermal history levels in KOBs (three batches from each thermal history level) in temporally replicated trials of the same FOFS treatment, as explained earlier. The approach for aquiring data, associated measurement corrections and calculations of response variables, and the parameter names, prefices and suffices are described in the method paper: Vajedsamiei et al., 2021 doi:https://doi.org/10.1002/lom3.10414