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  • 2020-2024  (13)
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  • 1
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    Origin and fate of dissolved organic matter in four shallow Baltic Sea estuaries (2020)
    Springer International Publishing
    Details
    Publication Date: 2023-06-20
    Description: Coastal waters have strong gradients in dissolved organic matter (DOM) quantity and characteristics, originating from terrestrial inputs and autochthonous production. Enclosed seas with high freshwater input therefore experience high DOM concentrations and gradients from freshwater sources to more saline waters. The brackish Baltic Sea experiences such salinity gradients from east to west and from river mouths to the open sea. Furthermore, the catchment areas of the Baltic Sea are very diverse and vary from sparsely populated northern areas to densely populated southern zones. Coastal systems vary from enclosed or open bays, estuaries, fjords, archipelagos and lagoons where the residence time of DOM at these sites varies and may control the extent to which organic matter is biologically, chemically or physically modified or simply diluted with transport off-shore. Data of DOM with simultaneous measurements of dissolved organic (DO) nitrogen (N), carbon (C) and phosphorus (P) across a range of contrasting coastal systems are scarce. Here we present data from the Roskilde Fjord, Vistula and Öre estuaries and Curonian Lagoon; four coastal systems with large differences in salinity, nutrient concentrations, freshwater inflow and catchment characteristics. The C:N:P ratios of DOM of our data, despite high variability, show site specific significant differences resulting largely from differences residence time. Microbial processes seemed to have minor effects, and only in spring did uptake of DON in the Vistula and Öre estuaries take place and not at the other sites or seasons. Resuspension from sediments impacts bottom waters and the entire shallow water column in the Curonian Lagoon. Finally, our data combined with published data show that land use in the catchments seems to impact the DOC:DON and DOC:DOP ratios of the tributaries most.
    Description: Academy of Sciences of Finland
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: BONUS COCOA and Bundesministerium für Bildung und Forschung
    Description: Academy of Finland
    Description: Danish Research Council for Independent Research
    Description: BONUS COCOA Project
    Description: Leibniz-Institut für Ostseeforschung Warnemünde (IOW) (3484)
    Keywords: ddc:551.9 ; Coastal systems ; Dissolved organic matter ; Riverine input ; Baltic Sea
    Language: English
    Type: doc-type:article
    Location Call Number Limitation Availability
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    CITATION GEO-LEO
  • 2
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    The East Gotland Basin (Baltic Sea) as a candidate Global boundary Stratotype Section and Point for the Anthropocene series (2023)
    SAGE Publications
    In:  EPIC3The Anthropocene Review, SAGE Publications, 10(1), pp. 25-48, ISSN: 2053-0196
    Details
    Publication Date: 2024-03-04
    Description: The short sediment core EMB201/7-4 retrieved from the East Gotland Basin, central Baltic Sea, is explored here as a candidate to host the stratigraphical basis for the Anthropocene series and its equivalent Anthropocene epoch, still to be formalized in the Geological Time Scale. The core has been accurately dated back to 1840 CE using a well-established event stratigraphy approach. A pronounced and significant change occurs at 26.5 cm (dated 1956 ± 4 CE) for a range of geochemical markers including 239+240Pu, 241Am, fly-ash particles, DDT (organochlorine insecticide), total organic carbon, and bulk organic carbon stable isotopes. This stratigraphic level, which corresponds to a change in both lithology and sediment colour related to early anthropogenic-triggered eutrophication of the central Baltic Sea, is proposed as a Global Boundary Stratotype Section and Point for the Anthropocene series.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 3
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    Sediment solid phase characteristics on the Amazon shelf obtained in April/May 2021 during RV METEOR cruise M174 (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-09
    Description: The Amazon River is known as a region of intense biochemical reactivity. As a result of increased anthropogenic impacts in its catchment (e.g. population growth, agriculture, and deforestation), The Amazon River is undergoing fundamental changes. The RV METEOR cruise M174 (https://doi.org/10.1594/PANGAEA.935041) aimed to provide an integrated overview of nitrogen cycling processes in areas influenced by the Amazon River, which is crucial to estimate the ecosystem's health and productivity. During this cruise, a MUC was deployed at eight stations to collect short sediment cores, in order to explore the influence of the river on sediments. This dataset presents the results of sediment solid phase characteristics from the surface sediment down to 30 cm depth.
    Keywords: Alkaline digestion method according to Ragueneau and Tréguer (1994); Amazon River; Benthic fluxes; Biogenic silica; Caesium-137; Caesium-137, error; Calculated; Calculated according to Fry (2006); Calculated according to Schulz and Zabel (2006); Calculated according to Shepard (1954); Carbon, organic, particulate; Carbon, organic, particulate/Nitrogen, total ratio; Components, marine; Components, terrestrial; DATE/TIME; DEPTH, sediment/rock; Depth, sediment/rock, bottom/maximum; Depth, sediment/rock, top/minimum; Elemental analyser isotope ratio mass spectrometer (EA-IRMS) system, Thermo Fisher Scientific, EA Isolink; ELEVATION; Event label; Gamma spectrometer, Canberra, Ge-detector BE3830-7500SL-RDC-6-ULB; coupled with well detector, Canberra, GCW4021-7500SL-RDC-6-ULB [GENIE 2000 software]; LATITUDE; Lead-210, unsupported; Lead-210, unsupported, error; LONGITUDE; M174; M174_10-9; M174_13-11; M174_17-25; M174_19-9; M174_21-16; M174_24-9; M174_26-15; M174_9-9; Measured according to Leipe et al. (2013); Mercury; Meteor (1986); MUC; MultiCorer; nitrogen; Nitrogen, total; nitrous oxide; porewater; Porosity, volume; sediment; Size fraction 〈 0.002 mm, clay; Size fraction 〈 0.063 mm, mud, silt+clay; Size fraction 0.067-0.002 mm, silt; Size fraction 2.100-0.076 mm, sand; South Atlantic Ocean; Station label; Tortuosity; δ13C, particulate organic carbon; δ15N, total nitrogen
    Type: Dataset
    Format: text/tab-separated-values, 1377 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Nutrient fluxes at the sediment-water interface in the Amazon shelf obtained in April/May 2021 during RV METEOR cruise M174 (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-09
    Description: The Amazon River is known as a region of intense biochemical reactivity. As a result of increased anthropogenic impacts in its catchment (e.g. population growth, agriculture and deforestation), The Amazon River is undergoing fundamental changes. The RV METEOR cruise M174 (https://doi.org/10.1594/PANGAEA.935041) aimed to provide an integrated overview of nitrogen cycling processes in areas influenced by the Amazon River, which is crucial to estimate the ecosystem's health and productivity. During this cruise, a MUC was deployed at eight stations to collect short sediment cores, in order to explore the influence of the river on sediments. This dataset presents the results of nutrient fluxes at the sediment-water interface measured via incubation experiments.
    Keywords: Amazon River; Ammonium, flux; Benthic fluxes; Calculated according to Schulz and Zabel (2006); DATE/TIME; ELEVATION; Event label; LATITUDE; LONGITUDE; M174; M174_10-9; M174_13-11; M174_17-25; M174_19-9; M174_21-16; M174_24-9; M174_26-15; M174_9-9; Meteor (1986); MUC; MultiCorer; Nitrate, flux; Nitrite, flux; nitrogen; nitrous oxide; Oxygen, flux; Phosphate, flux; porewater; sediment; Silicon dioxide, flux; South Atlantic Ocean; Station label; Type of study
    Type: Dataset
    Format: text/tab-separated-values, 305 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Compilation of nitrate δ15N in the ocean (2021)
    PANGAEA
    Details
    Publication Date: 2024-02-03
    Description: The database for nitrate concentrations and nitrate δ15N includes new data and most of the measurements that have been published to date. This database also includes most of the nitrate δ15N measurements in the database of Rafter et al. (2019; Biogeosciences 16, 2617-2633; https://doi.org/10.5194/bg-16-2617-2019). It consists of 944 stations with 15300 measurements of nitrate δ15N. All data are uploaded, except the GOSHIP P2 and P6 sections for which we report average profiles vs. depth. Full data sets for these sections will be included upon publication in a follow-up version.
    Keywords: Comment; Cruise/expedition; DEPTH, water; Identification; LATITUDE; LONGITUDE; nitrate; Nitrate; nitrogen isotopes; ocean; Reference/source; Time Stamp; Vessel; δ15N, nitrate
    Type: Dataset
    Format: text/tab-separated-values, 100052 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Multibeam bathymetry raw data (Kongsberg EM 122 entire dataset) of RV METEOR during cruise M174 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: Multibeam bathymetry raw data was recorded in the Atlantic during cruise M174 that took place between 2021-04-12 and 2021-05-30. The data was collected using the ship's own Kongsberg EM 122. Sound velocity profiles (SVP) were applied on the data for calibration. Please see environmental data (zip file) and the cruise report for details.
    Keywords: Bathymetry; Binary Object; Binary Object (File Size); Binary Object (Media Type); Comment; DAM_Underway; DAM Underway Research Data; Data file recording distance; Data file recording duration; DATE/TIME; ELEVATION; File content; KEM122; Kongsberg datagram raw file name; KONGSBERG EM122; LATITUDE; LONGITUDE; M174; M174_0_Underway-6; Meteor (1986); Multibeam Echosounder; Number of pings; Ship speed; Start of data file, depth; Start of data file, heading; Start of data file recording, date/time; Start of data file recording, latitude; Start of data file recording, longitude; Stop of data file, depth; Stop of data file, heading; Stop of data file recording, date/time; Stop of data file recording, latitude; Stop of data file recording, longitude
    Type: Dataset
    Format: text/tab-separated-values, 21852 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Master tracks in different resolutions of METEOR cruise M174, Las Palmas - Emden, 2021-04-12 - 2021-05-29 (2021)
    PANGAEA
    Details
    Publication Date: 2024-04-23
    Description: Raw data acquired by position sensors on board RV METEOR during expedition M174 were processed to receive a validated master track which can be used as reference of further expedition data. During M174 the motion reference unit Kongsberg SeaTex AS MRU-5 combined with Kongsberg SeaTex AS Seapath 320 and two C and C Technologies GPS receivers C-NAV3050 were used as navigation sensors. Data were downloaded from DAVIS SHIP data base (https://dship.bsh.de) with a resolution of 1 sec. Processing and evaluation of the data is outlined in the data processing report. Processed data are provided as a master track with 1 sec resolution derived from the position sensors' data selected by priority and a generalized track with a reduced set of the most significant positions of the master track.
    Keywords: Calculated; Course; CT; DAM_Underway; DAM Underway Research Data; DATE/TIME; LATITUDE; LONGITUDE; M174; M174-track; Meteor (1986); Speed; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 13628 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Updated pelagic nitrogen budget of the Amazon and Pará estuaries of METEOR cruise M174 (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-23
    Description: The Amazon River is known as a region of intense biochemical reactivity. As a result of increased anthropogenic impacts in its catchment (e.g. population growth, agriculture, and deforestation), The Amazon River is undergoing fundamental changes. The RV METEOR cruise M174 (doi:10.1594/PANGAEA.935041) aimed to provide an integrated overview of nitrogen cycling processes in areas influenced by the Amazon River, which is crucial to estimate the ecosystem's health and productivity. During this cruise, six stations were visited to create an updated nitrogen budget of the Amazon and Pará estuaries. This dataset presents the results of the budget calculated for 6 stations of varying turbidity. Nitrification, nitrate, ammonium and amino acid uptake rates (in mol/day) are taken into account in this budget, and compared to riverine dissolved inorganic nitrogen inputs. Dissolved inorganic carbon uptake rates are also presented.
    Keywords: According to Damashek et al. (2016); According to Dugdale and Goering (1967); Amazon River; Amino acids, uptake rate, integrated; Amino acids, uptake rate, integrated, standard deviation; Ammonium, dark, uptake rate, integrated; Ammonium, dark, uptake rate, integrated, standard deviation; Ammonium, uptake rate, integrated; Ammonium, uptake rate, integrated, standard deviation; Area; Budget; Calculated; CTD, Sea-Bird, SBE 911plus; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Dissolved organic carbon, uptake rate, integrated; Dissolved organic carbon, uptake rate, integrated, standard deviation; Event label; export flux; Latitude, center; Latitude of event; Longitude, center; Longitude of event; M174; M174_10-2; M174_12-2; M174_13-3; M174_14-2; M174_17-16; M174_9-2; Meteor (1986); Nitrate, uptake rate, integrated; Nitrate, uptake rate, integrated, standard deviation; Nitrification, integrated; Nitrification, integrated, standard deviation; Nitrogen; Nitrogen, inorganic, dissolved, loading; Optical backscatter sensor, D&A, OBS-3; South Atlantic Ocean; Turbidity
    Type: Dataset
    Format: text/tab-separated-values, 138 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Nitrate d15N and d18O, and water d2H and d18O stable isotopes of METEOR cruise M174 (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-23
    Description: The Amazon River is known as a region of intense biochemical reactivity. As a result of increased anthropogenic impacts in its catchment (e.g. population growth, agriculture, and deforestation), The Amazon River is undergoing fundamental changes. The RV METEOR cruise M174 (doi:10.1594/PANGAEA.935041) aimed to provide an integrated overview of nitrogen cycling processes in areas influenced by the Amazon River, which is crucial to estimate the ecosystem's health and productivity. During this cruise, six stations were visited to explore the significance of denitrification as a dominant pathway in the watercolumn of the Amazon and Pará estuaries. This dataset presents the stable isotopic composition of nitrate (d15N- d18O-NO3), as well as d2H and d18O of ambient water.
    Keywords: According to Böttcher & Schmiedinger (2021); According to Sigman et al. (2001) and Weigand et al. (2016); Amazon; Amazon estuary; Amazon River; Calculated; CTD, Sea-Bird, SBE 911plus; CTD/Rosette; CTD-RO; d15N; d18O; d2H; Date/Time of event; Event label; Latitude of event; Longitude of event; M174; M174_10-2; M174_12-2; M174_13-3; M174_14-2; M174_17-16; M174_9-2; Meteor (1986); Methods of Seawater Analysis, 3rd edition (Grasshoff et al., 1999); nitrate; Nitrate; Nitrate, standard deviation; Salinity; South Atlantic Ocean; Stable isotopes; Temperature, water; water; δ15N, nitrate; δ15N, nitrate, standard deviation; δ18O, nitrate; δ18O, nitrate, standard deviation; δ18O, water; δ18O, water, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 60 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Contribution of various Nitrogen cycle processes to the nitrogen budget of the Amazon and Pará estuaries of METEOR cruise M174 (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-23
    Description: The Amazon River is known as a region of intense biochemical reactivity. As a result of increased anthropogenic impacts in its catchment (e.g. population growth, agriculture, and deforestation), the Amazon River is undergoing fundamental changes. During the RV METEOR cruise M174 (doi:10.1594/PANGAEA.935041), six stations were visited to study the nitrogen cycling and productivity of the Amazon and Pará estuaries, which is crucial to estimate the ecosystem's health. This dataset presents rates of various nitrogen cycle processes (nitrification, nitrate, ammonium, and amino acid uptake rates) as well as associated dissolved inorganic carbon uptake rates. Rates are presented as volumetric rates, as well as rates integrated over the euphotic zone (3 to 10 meters).
    Keywords: According to Damashek et al. (2016); According to Dugdale and Goering (1967); Amazon; Amazon estuary; Amino acids, uptake rate; Amino acids, uptake rate, integrated; Amino acids, uptake rate, integrated, standard deviation; Ammonium, uptake rate, integrated; Ammonium, uptake rate, integrated, standard deviation; Ammonium uptake rate; Area/locality; Calculated; Carbon, inorganic, dissolved, uptake rate; Carbon, inorganic, dissolved, uptake rate, integrated; Carbon, inorganic, dissolved, uptake rate, integrated, standard deviation; Carbon, inorganic, dissolved, uptake rate, standard deviation; CTD, Sea-Bird, SBE 911plus; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Depth comment; Event label; Incubation type; Latitude of event; Longitude of event; M174; M174_10-2; M174_12-2; M174_13-3; M174_14-2; M174_17-16; M174_9-2; Meteor (1986); Nitrate, uptake rate, integrated; Nitrate, uptake rate, integrated, standard deviation; Nitrate uptake rate; Nitrate uptake rate, standard deviation; Nitrification, integrated; Nitrification, integrated, standard deviation; Nitrification rate; Nitrification rate, standard deviation; Nitrogen; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 228 data points
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    DATA PANGAEA
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