/* DATA DESCRIPTION: Citation: Adenaya, Adenike; Haack, Michaela; Stolle, Christian; Wurl, Oliver; Ribas-Ribas, Mariana (2021): Oxygen microprofiles in de-ionised water (after 30 min) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.937758, In: Adenaya, A et al. (2021): Oxygen microprofiles in de-ionised water and natural seawater [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.937780 Abstract: Oxygen microprofiles of de-ionised water and natural seawater were measured in a laboratory experiment in the marine interface lab at the Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, in Wilhelmshaven, Germany, between November 2017 and November 2019. With the de-ionised water experiment, we added Oleyl achohol and Triton-X-100 and with the seawater, we measured filtered and unfiltered seawater and we added natural sea surface microlayer. For all the experiments we did three replicates of 30, 60 and 120 minutes waiting time. The oxygen concentrations were measured using a Clark-type OX-50 microsensor (Unisense, Denmark) connected to a picoammeter (Unisense Microsensor Multimeter, Denmark). The seawater samples were collected between November 2017 and November 2019 in the Jade Bay from the harbour close to the ICBM (Alter Vorhafen 53° 30' 49.4634" N 8° 8' 43.764" E). The different microprofiles were collected to calculate the diffusive boundary layer and how the articial and natural surfactants affect it. Sea surface microlayer samples were collected with the glass plate method. The glass plate (30 x 40 cm) was immersed vertically down into the underlying water and then withdrawn with approximately 5 cm per second up to allow the SML adhere to the glass plate based on capillary forces. The attached SML sample was then transferred into a sterile brown bottle from the glass plate with a squeegee. The glass plate was cleaned with 70 % ethanol before use and the process was repeated until required volume (100 mL) was obtained. Keyword(s): diffusive boundary layer; Oxygen outflux; Sea surface microlayers; Surface tension; Surfactants Related to: Adenaya, Adenike; Haack, Michaela; Stolle, Christian; Wurl, Oliver; Ribas-Ribas, Mariana (2021): Effects of Natural and Artificial Surfactants on Diffusive Boundary Dynamics and Oxygen Exchanges across the Air–Water Interface. Oceans, 2(4), 752-771, https://doi.org/10.3390/oceans2040043 Project(s): Parameterization of the Sea-Surface Microlayer Effect (PASSME) (URI: https://uol.de/en/icbm/processes-and-sensing-of-marine-interfaces/projects/passme) Funding: European Research Council (ERC), grant/award no. 336408: Air-sea gas exchange - PArameterization of the Sea-Surface Microlayer Effect (PASSME) (URI: https://cordis.europa.eu/project/id/336408) Coverage: LATITUDE: 53.513740 * LONGITUDE: 8.145490 DATE/TIME START: 2017-11-01T00:00:00 * DATE/TIME END: 2019-11-30T00:00:00 Event(s): JadeBay_AlterVorhafen-Whv_2017-2019 * LATITUDE: 53.513740 * LONGITUDE: 8.145490 * DATE/TIME START: 2017-11-01T00:00:00 * DATE/TIME END: 2019-11-30T00:00:00 * LOCATION: Jade Bay * METHOD/DEVICE: Water sample (WS) Comment: Experiment: De-ionized water 30 min (three replicates) Parameter(s): Microprofile depth [μm] (Microprofile depth) * PI: Adenaya, Adenike (https://orcid.org/0000-0002-9714-0864, adenike.adenaya@uni-oldenburg.de) Oxygen [µmol/l] (O2) * PI: Adenaya, Adenike (https://orcid.org/0000-0002-9714-0864, adenike.adenaya@uni-oldenburg.de) * METHOD/DEVICE: Clark-type OX-50 microsensor (Unisense, Denmark) connected to a picoammeter (Unisense Microsensor Multimeter, Denmark) * COMMENT: replicate 1 Oxygen [µmol/l] (O2) * PI: Adenaya, Adenike (https://orcid.org/0000-0002-9714-0864, adenike.adenaya@uni-oldenburg.de) * METHOD/DEVICE: Clark-type OX-50 microsensor (Unisense, Denmark) connected to a picoammeter (Unisense Microsensor Multimeter, Denmark) * COMMENT: replicate 2 Oxygen [µmol/l] (O2) * PI: Adenaya, Adenike (https://orcid.org/0000-0002-9714-0864, adenike.adenaya@uni-oldenburg.de) * METHOD/DEVICE: Clark-type OX-50 microsensor (Unisense, Denmark) connected to a picoammeter (Unisense Microsensor Multimeter, Denmark) * COMMENT: replicate 3 License: Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/) Status: Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels) Size: 164 data points */ Microprofile depth [μm] O2 [µmol/l] (replicate 1) O2 [µmol/l] (replicate 2) O2 [µmol/l] (replicate 3) 4000 0.14 2.25 -10.42 3900 0.87 3.28 -12.53 3800 2.19 4.43 -9.85 3700 2.55 4.88 -12.59 3600 2.38 3.94 -11.90 3500 3.60 7.00 -10.60 3400 4.46 8.91 -1.91 3300 4.98 11.43 58.02 3200 6.31 14.91 169.72 3100 7.41 24.34 217.60 3000 10.29 52.40 242.11 2900 13.46 126.40 242.06 2800 21.05 210.68 242.72 2700 39.14 237.25 242.35 2600 97.11 236.91 243.20 2500 167.98 237.80 242.61 2400 223.55 236.69 243.18 2300 231.97 237.63 242.73 2200 234.96 238.10 242.38 2100 232.51 237.44 241.54 2000 232.99 238.02 243.23 1900 230.38 237.42 243.24 1800 229.61 237.32 242.40 1700 233.35 237.83 243.31 1600 232.50 237.69 242.77 1500 232.47 237.03 243.84 1400 233.57 237.90 242.41 1300 234.18 237.91 242.54 1200 233.42 237.48 238.52 1100 233.93 237.39 242.21 1000 232.40 238.53 241.25 900 233.96 237.56 242.90 800 234.18 237.38 241.27 700 232.53 237.23 242.25 600 233.55 236.45 242.20 500 232.79 236.65 241.07 400 233.57 236.51 242.22 300 235.43 236.25 241.37 200 233.70 235.91 240.90 100 232.39 234.87 240.33 0 233.18 234.45 240.78