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  • 11
    Publication Date: 2023-03-03
    Keywords: Bottle, Niskin 10-L; Carbon, organic, particulate; Carbon, organic, total; Carbon, organic, total, standard deviation; DEPTH, water; NIS_10L; Nitrogen, organic, particulate; North Atlantic; Phosphorus, organic, particulate; POS284; POS284_148; Poseidon
    Type: Dataset
    Format: text/tab-separated-values, 52 data points
    Location Call Number Limitation Availability
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  • 12
    Publication Date: 2023-03-03
    Keywords: Bottle, Niskin 10-L; Carbon, organic, particulate; Carbon, organic, total; Carbon, organic, total, standard deviation; DEPTH, water; NIS_10L; Nitrogen, organic, particulate; North Atlantic; Phosphorus, organic, particulate; POS284; POS284_159; Poseidon
    Type: Dataset
    Format: text/tab-separated-values, 53 data points
    Location Call Number Limitation Availability
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  • 13
    Publication Date: 2023-03-03
    Keywords: Bottle, Niskin 10-L; Carbon, organic, particulate; Carbon, organic, total; Carbon, organic, total, standard deviation; DEPTH, water; NIS_10L; Nitrogen, organic, particulate; North Atlantic; Phosphorus, organic, particulate; POS284; POS284_167; Poseidon
    Type: Dataset
    Format: text/tab-separated-values, 46 data points
    Location Call Number Limitation Availability
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  • 14
    Publication Date: 2023-03-03
    Keywords: Bottle, Niskin 10-L; Carbon, organic, particulate; Carbon, organic, total; Carbon, organic, total, standard deviation; DEPTH, water; NIS_10L; Nitrogen, organic, particulate; North Atlantic; Phosphorus, organic, particulate; POS284; POS284_156; Poseidon
    Type: Dataset
    Format: text/tab-separated-values, 52 data points
    Location Call Number Limitation Availability
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  • 15
    Publication Date: 2023-03-03
    Keywords: Bottle, Niskin 10-L; Carbon, organic, particulate; Carbon, organic, total; Carbon, organic, total, standard deviation; DEPTH, water; NIS_10L; Nitrogen, organic, particulate; North Atlantic; Phosphorus, organic, particulate; POS284; POS284_183; Poseidon
    Type: Dataset
    Format: text/tab-separated-values, 33 data points
    Location Call Number Limitation Availability
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  • 16
    Publication Date: 2023-03-03
    Keywords: Bottle, Niskin 10-L; Carbon, organic, particulate; Carbon, organic, total; Carbon, organic, total, standard deviation; DEPTH, water; NIS_10L; Nitrogen, organic, particulate; North Atlantic; Phosphorus, organic, particulate; POS284; POS284_173; Poseidon
    Type: Dataset
    Format: text/tab-separated-values, 51 data points
    Location Call Number Limitation Availability
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  • 17
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    PANGAEA
    In:  Supplement to: Fietzke, Jan; Ragazzola, Federica; Halfar, Jochen; Dietze, Heiner; Foster, Laura C; Hansteen, Thor H; Eisenhauer, Anton; Steneck, Robert S (2015): Century-scale trends and seasonality in pH and temperature for shallow zones of the Bering Sea. Proceedings of the National Academy of Sciences, 201419216, https://doi.org/10.1073/pnas.1419216112
    Publication Date: 2023-02-24
    Description: Increasing atmospheric CO2 concentrations are potentially affecting marine ecosystems twofold, by warming and acidification. The rising amount of CO2 taken up by the ocean lowers the saturation state of calcium carbonate, complicating the formation of this key biomineral used by many marine organisms to build hard parts like skeletons or shells. Reliable time-series data of seawater pH are needed to evaluate the ongoing change and compare long-term trends and natural variability. For the high-latitude ocean, the region facing the strongest CO2 uptake, such time-series data are so far entirely lacking. Our study provides, to our knowledge, the first reconstruction of seasonal cycle and long-term trend in pH for a high-latitude ocean obtained from 2D images of stable boron isotopes from a coralline alga.
    Keywords: Aleutian Islands Alaska; Attu_Island; BIOACID; Biological Impacts of Ocean Acidification; DIVER; Sampling by diver
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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  • 18
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    PANGAEA
    In:  Supplement to: Löptien, Ulrike; Dietze, Heiner (2014): Sea ice in the Baltic Sea - revisiting BASIS ice, a historical data set covering the period 1960/1961 - 1978/1979. Earth System Science Data, 6(2), 367-374, https://doi.org/10.5194/essd-6-367-2014
    Publication Date: 2023-02-24
    Description: The Baltic Sea is a seasonally ice-covered, marginal sea in central northern Europe. It is an essential waterway connecting highly industrialised countries. Because ship traffic is intermittently hindered by sea ice, the local weather services have been monitoring sea ice conditions for decades. In the present study we revisit a historical monitoring data set, covering the winters 1960/1961 to 1978/1979. This data set, dubbed Data Bank for Baltic Sea Ice and Sea Surface Temperatures (BASIS) ice, is based on hand-drawn maps that were collected and then digitised in 1981 in a joint project of the Finnish Institute of Marine Research (today the Finnish Meteorological Institute (FMI)) and the Swedish Meteorological and Hydrological Institute (SMHI). BASIS ice was designed for storage on punch cards and all ice information is encoded by five digits. This makes the data hard to access. Here we present a post-processed product based on the original five-digit code. Specifically, we convert to standard ice quantities (including information on ice types), which we distribute in the current and free Network Common Data Format (NetCDF). Our post-processed data set will help to assess numerical ice models and provide easy-to-access unique historical reference material for sea ice in the Baltic Sea. In addition we provide statistics showcasing the data quality. The website http://www.baltic-ocean.org hosts the post-processed data and the conversion code.
    Keywords: GEOMAR; Helmholtz Centre for Ocean Research Kiel
    Type: Dataset
    Format: application/zip, 2.5 MBytes
    Location Call Number Limitation Availability
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  • 19
    Publication Date: 2023-05-12
    Description: Here we provide optimised vertical eddy diffusivity estimates for the PeECE III and KOSMOS 2013 mesocosm experiment, obtained from a model-based reanalysis. These diffusivities are derived from the observed temperature and salinity profiles that have been published in Schulz et al., 2008. Furthermore, we make our model code available, providing an adjustable tool to simulate vertical mixing in any other pelagic mesocosm. We also provide the interpolated and regridded temperature and salinity profiles of the PeECE III experiment as well as the density profiles which we calculated from the temperature and salinity profiles using the R package seacarb (Lavigne et al., 2011). These data files are required as input to run simulations of the PeECE III experiment with the 1D mesocosm mixing model. The columns of the environmental files (required input files for the model) from left to right are: Experiment year, month, day, Julian day, photosynthetically active radiation (PAR) [W/m^2], temperature [C], salinity [PSU], CO2 concentration [ppm], wind speed [m/s]. The rows list the respective value of each hour of the experiment. Temperature and salinity in this table are hourly interpolated values of the daily measurements published by the PeECE III team (2005). PAR has been calculated from global radiation data of Bergen provided by Olseth et al., 2005. In the temperature, salinity and density files, the rows indicate the depth (0.5 m resolution, the first row is the surface, the last row is the bottom), whereas the columns indicate the experiment time at an hourly resolution.
    Keywords: File content; File format; File name; File size; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 20 data points
    Location Call Number Limitation Availability
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  • 20
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    PANGAEA
    In:  Supplement to: Landolfi, Angela; Dietze, Heiner; Koeve, Wolfgang; Oschlies, Andreas (2013): Overlooked runaway feedback in the marine nitrogen cycle: the vicious cycle. Biogeosciences, 10(3), 1351-1363, https://doi.org/10.5194/bg-10-1351-2013
    Publication Date: 2023-05-12
    Description: The marine nitrogen (N) inventory is thought to be stabilized by negative feedback mechanisms that reduce N inventory excursions relative to the more slowly overturning phosphorus inventory. Using a global biogeochemical ocean circulation model we show that negative feedbacks stabilizing the N inventory cannot persist if a close spatial association of N2 fixation and denitrification occurs. In our idealized model experiments, nitrogen deficient waters, generated by denitrification, stimulate local N2 fixation activity. But, because of stoichiometric constraints, the denitrification of newly fixed nitrogen leads to a net loss of N. This can enhance the N deficit, thereby triggering additional fixation in a vicious cycle, ultimately leading to a runaway N loss. To break this vicious cycle, and allow for stabilizing negative feedbacks to occur, inputs of new N need to be spatially decoupled from denitrification. Our idealized model experiments suggest that factors such as iron limitation or dissolved organic matter cycling can promote such decoupling and allow for negative feedbacks that stabilize the N inventory. Conversely, close spatial co-location of N2 fixation and denitrification could lead to net N loss.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification; Description; File format; File size; modelled; Uniform resource locator/link to model result file
    Type: Dataset
    Format: text/tab-separated-values, 16 data points
    Location Call Number Limitation Availability
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