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Continuous water level observations within DynaCom experimental islands and saltmarsh enclosed plots at different elevation levels, Spiekeroog, Germany, 2020-01 to 2023-09
No full textData presented here were collected between January 2020 to September 2023 within the research unit DynaCom (Spatial community ecology in highly dynamic landscapes: From island biogeography to metaecosystems, https://uol.de/dynacom/ ) involving the Universities of Oldenburg, Göttingen, and Münster, the iDiv Leipzig and the Nationalpark Niedersächsisches Wattenmeer. Experimental islands and saltmarsh enclosed plots were established in the back-barrier tidal flat and in the saltmarsh zone of the island of Spiekeroog (Germany). Groundwater levels at different elevation zones were measured using pressure loggers deployed in dip wells within the experimental islands as well as in the saltmarsh enclosed plots. Measurements were obtained using Hobo U20L Water Level Loggers (Onset Computer Corporation, Bourne, MA/USA) and a DEFI-D Miniature Pressure Recorder (JFE Advantech Co., Ltd., Tokyo; DEFI-D). All devices were pre-calibrated by the manufacturer. Logged data were retrieved in the field using a Hobo Underwater Shuttle (U-DTW-1) and were read out with the HOBOware Pro (V3.7.28) software or with the DEFI Series software (V1.02), depending on the instrument. Subsequent data processing was done using MATLAB (R2024b). Atmospheric pressure correction for water-level calculations was applied using data from a nearby weather station. Post-processing and quality control included (a) the removal of data covering maintenance activities, (b) an outlier detection, and (c) visual checks. Outliers in water level and temperature time series were detected using a moving-median filter and a 3-sigma criterion, with additional cross-checking against a reference sensor. Identified outliers were removed, and height-corrected water level series were produced to ensure consistency across sensors and years
Methane and nitrous oxide dissolved gas concentrations from western Long Island Sound
No full textThis dataset contains methane and nitrous oxide dissolved gas concentration (this dataset), sea-air fluxes (https://doi.pangaea.de/10.1594/PANGAEA.987952), and ancillary hydrographic data from research cruises in western Long Island Sound occurring in August 2023, October 2023, and May 2024. Water samples for methane and nitrous oxide analysis were collected from Niskin bottles mounted on a CTD rosette. Water was collected into glass serum bottles and at least three volumes of water were allowed to flow through the sample before it was preserved and sealed with a butyl rubber stopper and aluminum crimp seal. Gas concentrations were determined using a headspace equilibration method and gas chromatograph with electron capture detector (for nitrous oxide) and flame ionization detector (for methane). Equilibrium dissolved concentrations were calculated from the measured temperature and salinity following the solubility equations of Wiesenburg and Guinasso (1979) for methane and Weiss and Price (1980) for nitrous oxide. Dry atmospheric concentrations were set to 2020 ppbv for methane and 338 ppbv for nitrous oxide and adjusted to 100% humidity. These concentrations are taken from preliminary surface flask results from Mashpee, Massachusetts, USA (station MSH) from the NOAA Carbon Cycle Greenhouse Gases group website (https://gml.noaa.gov/ccgg/) and represent the average over the three cruises (Dlugokencky et al., 2020b, a; Hall et al., 2007). Oxygen concentration was determined using an oxygen sensor mounted on the Niskin rosette, calibrated with discrete samples analyzed by Winkler titration (Langdon et al., 2010), which were also collected from the CTD rosette. The mixed layer depth was defined based on a potential density difference criterion of 0.125 kg/m³ relative to the shallowest measurement (either 2 or 3 m), using CTD profiles binned to 1 m. The 15-day weighted gas transfer velocities and fluxes are calculated using wind speeds measured over 15 days at 15-minute intervals prior to sampling using the data from NOAA buoy 44022 with weighting based on the fraction of the mixed layer ventilated during each time step following the method of Teeter et al. (2018) as described in the main manuscript of Manning et al. (2025) and software of Manning and Nicholson (2022)
Multibeam bathymetry raw data (Kongsberg EM 122 entire dataset) of RV METEOR during cruise M211
No full textRaw multibeam bathymetry data were collected aboard RV METEOR during cruise M211 using a Kongsberg EM 122 multibeam echosounder. The expedition took place during 2025-06-13 – 2025-07-28 from Nice (France) to Ponta Delgada (Portugal) in the Mediterranean Sea and Central East Atlantic. The overall goal of M211 has been to provide observational data of skin (upper 1 mm of the ocean) and near-surface salinity and temperature, and to gain mechanistic understanding of the dynamics of their anomalies. With this knowledge, we aim to understand how the skin and near-surface thermohaline field data can be used to integrate dynamic E-P fluxes in the subtropical (dominated by evaporation) and tropical Atlantic (dominated by precipitation). Interaction with atmospheric and oceanic forcing (e.g. near-surface humidity and air temperature, biogenic surfactants films and turbulent mixing) influence the anomalies in the skin layer and needs to be quantified. Data were solely recorded in international waters. Sound velocity profiles (SVP) were applied on the data for calibration. Please see environmental data and the cruise report for details. The data are unprocessed and can therefore contain incorrect depth measurements (artifacts) if not further processed. Note that refraction errors may occur when no proper SVP is applied. Data acquisition was done by University of Oldenburg, provision of the data is supported by the DAM Project Underway Research Data and published according to the FAIR principles
Master track of Eugen Seibold cruise ES21C16, Playa Blanca - Playa Blanca, 2021-09-24 - 2021-09-25
No full textThis dataset contains the validated master track of the S/Y Eugen Seibold during expedition ES21C16, with a time resolution of about 10 seconds. This master track can be used as reference for further expedition data. For creating the master track, the 1-second resolution raw data acquired by the GPS position sensor on board S/Y Eugen Seibold were processed, averaging latitude and longitude within equidistant 10-second intervals. Quality control was performed visually and by checking the maximum speed calculated between neighbouring positions. In case of unrealistically high speeds, data points have been removed
Data compilation of authigenic εNd from Fe-Mn leachates, foraminifera, fossil fish teeth and corresponding detrital εNd from sediment samples
No full textThe table compiles published datasets of authigenic εNd values (including Fe-Mn leachates, foraminifera, and fossil fish teeth) and corresponding detrital εNd values obtained from the same sediment samples, forming paired authigenic-detrital records. Most entries are sourced from references cited in Abbott et al. (2022, doi:10.1016/j.gca.2021.11.021) with Horikawa et al. (2021, doi:10.1029/2021pa004312) added to improve fossil fish tooth coverage in the Pacific. The dataset is divided into three tables (leachates, foraminifera, and fossil fish teeth), with all associated references listed in a fourth table
Master track of Eugen Seibold cruise ES22C06, Playa Blanca - Playa Blanca, 2022-03-19 - 2022-03-19
No full textThis dataset contains the validated master track of the S/Y Eugen Seibold during expedition ES22C06, with a time resolution of about 10 seconds. This master track can be used as reference for further expedition data. For creating the master track, the 1-second resolution raw data acquired by the GPS position sensor on board S/Y Eugen Seibold were processed, averaging latitude and longitude within equidistant 10-second intervals. Quality control was performed visually and by checking the maximum speed calculated between neighbouring positions. In case of unrealistically high speeds, data points have been removed
Master track of Eugen Seibold cruise ES22C16, Playa Blanca - Playa Blanca, 2022-10-28 - 2022-10-28
No full textThis dataset contains the validated master track of the S/Y Eugen Seibold during expedition ES22C16, with a time resolution of about 10 seconds. This master track can be used as reference for further expedition data. For creating the master track, the 1-second resolution raw data acquired by the GPS position sensor on board S/Y Eugen Seibold were processed, averaging latitude and longitude within equidistant 10-second intervals. Quality control was performed visually and by checking the maximum speed calculated between neighbouring positions. In case of unrealistically high speeds, data points have been removed
Master track of Eugen Seibold cruise ES22C08, A Coruña - Bremerhaven, 2022-04-12 - 2022-04-17
No full textThis dataset contains the validated master track of the S/Y Eugen Seibold during expedition ES22C08, with a time resolution of about 10 seconds. This master track can be used as reference for further expedition data. For creating the master track, the 1-second resolution raw data acquired by the GPS position sensor on board S/Y Eugen Seibold were processed, averaging latitude and longitude within equidistant 10-second intervals. Quality control was performed visually and by checking the maximum speed calculated between neighbouring positions. In case of unrealistically high speeds, data points have been removed