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  • PANGAEA  (54)
  • ASLO (Association for the Sciences of Limnology and Oceanography)  (1)
  • 2020-2024  (55)
Document type
Keywords
Publisher
Years
Year
  • 1
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    Echo grid integration: A novel method for preprocessing multibeam water column data to quantify underwater gas bubble emissions (2023)
    Wiley | ASLO (Association for the Sciences of Limnology and Oceanography)
    Details
    Publication Date: 2024-02-07
    Description: Water column imaging multibeam echo sounder systems (MBESs) are a promising technology for quantitative estimates of the gas bubble volume flow within large gas seepage areas. Considerable progress has been made in recent years toward applicable calibration methods for MBESs as well as developing inversion models to convert acoustically measured backscattering cross sections to gas bubble volume flow. However, MBESs are still not commonly used for quantitative gas flow assessments. A reason for this is the absence of published processing methods that demonstrate how MBES data can be processed to quantitatively represent bubble streams. Here, we present a novel method (echo grid integration) that allows for assessing the aggregated backscattering cross section of targets within horizontal water layers. This derived value enables quantifying bubble stream gas flow rates using existing acoustic inversion methods. The presented method is based on averaging geo-referenced volume backscattering coefficients onto a high-resolution 3D voxel-grid. The results are multiplied with the voxel volume to represent measurements of the total backscattering cross-section within each voxel cell. Individual gridded values cannot be trusted because the beam pattern effects cause the values of individual targets to “smear” over multiple grid-cells. The true aggregated backscattering cross-section is thus estimated as the integral over the grid-cells affected by this smearing. Numerical simulation of MBES data acquisition over known targets assesses the method's validity and quantify it's uncertainty for different, realistic scenarios. The found low measurement bias (〈 1%), and dispersion (〈 5%) are promising for application in gas flow quantification methods.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Time series of atmospheric methane and carbon dioxide concentrations measured during POSEIDON cruise POS533 (2020)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-03-03
    Description: The atmospheric CO₂ and CH4 concentrations were monitored throughout the cruise using a cavity ring down spectrometer (CRDS, Picarro G2301-f) and GEOMARs 'Atmospheric Intake System' (AIS).
    Keywords: AIMAC; CT; POS533/1; POS533-track; Poseidon; Underway cruise track measurements
    Type: Dataset
    Format: application/zip, 23 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Atmospheric methane and carbon dioxide concentrations measured during POSEIDON cruise POS533, 2019-02-28 (2020)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-03-03
    Keywords: AIMAC; ALTITUDE; Carbon dioxide; Cavity ring down spectrometer, G2301-f, Picarro Inc.; Course over ground; CT; DATE/TIME; Heading; Humidity, relative; LATITUDE; LONGITUDE; Methane; POS533/1; POS533-track; Poseidon; Position; Pressure, atmospheric; Ship speed; Ships weather station; Temperature, air; Temperature, water; Underway cruise track measurements; Wind direction, relative; Wind direction, true; Wind speed, relative; Wind speed, true
    Type: Dataset
    Format: text/tab-separated-values, 2462490 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Atmospheric methane and carbon dioxide concentrations measured during POSEIDON cruise POS533, 2019-03-01 (2020)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-03-03
    Keywords: AIMAC; ALTITUDE; Carbon dioxide; Cavity ring down spectrometer, G2301-f, Picarro Inc.; Course over ground; CT; DATE/TIME; Heading; Humidity, relative; LATITUDE; LONGITUDE; Methane; POS533/1; POS533-track; Poseidon; Position; Pressure, atmospheric; Ship speed; Ships weather station; Temperature, air; Temperature, water; Underway cruise track measurements; Wind direction, relative; Wind direction, true; Wind speed, relative; Wind speed, true
    Type: Dataset
    Format: text/tab-separated-values, 2469540 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Atmospheric methane and carbon dioxide concentrations measured during POSEIDON cruise POS533, 2019-03-03 (2020)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-03-03
    Keywords: AIMAC; ALTITUDE; Carbon dioxide; Cavity ring down spectrometer, G2301-f, Picarro Inc.; Course over ground; CT; DATE/TIME; Heading; Humidity, relative; LATITUDE; LONGITUDE; Methane; POS533/1; POS533-track; Poseidon; Position; Pressure, atmospheric; Ship speed; Ships weather station; Temperature, air; Temperature, water; Underway cruise track measurements; Wind direction, relative; Wind direction, true; Wind speed, relative; Wind speed, true
    Type: Dataset
    Format: text/tab-separated-values, 2193554 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Atmospheric methane and carbon dioxide concentrations measured during POSEIDON cruise POS533, 2019-03-02 (2020)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-03-03
    Keywords: AIMAC; ALTITUDE; Carbon dioxide; Cavity ring down spectrometer, G2301-f, Picarro Inc.; Course over ground; CT; DATE/TIME; Heading; Humidity, relative; LATITUDE; LONGITUDE; Methane; POS533/1; POS533-track; Poseidon; Position; Pressure, atmospheric; Ship speed; Ships weather station; Temperature, air; Temperature, water; Underway cruise track measurements; Wind direction, relative; Wind direction, true; Wind speed, relative; Wind speed, true
    Type: Dataset
    Format: text/tab-separated-values, 2389986 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Atmospheric methane and carbon dioxide concentrations measured during POSEIDON cruise POS533, 2019-03-04 (2020)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-03-03
    Keywords: AIMAC; ALTITUDE; Carbon dioxide; Cavity ring down spectrometer, G2301-f, Picarro Inc.; Course over ground; CT; DATE/TIME; Heading; Humidity, relative; LATITUDE; LONGITUDE; Methane; POS533/1; POS533-track; Poseidon; Position; Pressure, atmospheric; Ship speed; Ships weather station; Temperature, air; Temperature, water; Underway cruise track measurements; Wind direction, relative; Wind direction, true; Wind speed, relative; Wind speed, true
    Type: Dataset
    Format: text/tab-separated-values, 2470230 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Atmospheric methane and carbon dioxide concentrations measured during POSEIDON cruise POS533, 2019-03-05 (2020)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-03-03
    Keywords: AIMAC; ALTITUDE; Carbon dioxide; Cavity ring down spectrometer, G2301-f, Picarro Inc.; Course over ground; CT; DATE/TIME; Heading; Humidity, relative; LATITUDE; LONGITUDE; Methane; POS533/1; POS533-track; Poseidon; Position; Pressure, atmospheric; Ship speed; Ships weather station; Temperature, air; Temperature, water; Underway cruise track measurements; Wind direction, relative; Wind direction, true; Wind speed, relative; Wind speed, true
    Type: Dataset
    Format: text/tab-separated-values, 2462805 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Atmospheric methane and carbon dioxide concentrations measured during POSEIDON cruise POS533, 2019-03-07 (2020)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-03-03
    Keywords: AIMAC; ALTITUDE; Carbon dioxide; Cavity ring down spectrometer, G2301-f, Picarro Inc.; Course over ground; CT; DATE/TIME; Heading; Humidity, relative; LATITUDE; LONGITUDE; Methane; POS533/1; POS533-track; Poseidon; Position; Pressure, atmospheric; Ship speed; Ships weather station; Temperature, air; Temperature, water; Underway cruise track measurements; Wind direction, relative; Wind direction, true; Wind speed, relative; Wind speed, true
    Type: Dataset
    Format: text/tab-separated-values, 2474610 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Atmospheric methane and carbon dioxide concentrations measured during POSEIDON cruise POS533, 2019-03-06 (2020)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2023-03-03
    Keywords: AIMAC; ALTITUDE; Carbon dioxide; Cavity ring down spectrometer, G2301-f, Picarro Inc.; Course over ground; CT; DATE/TIME; Heading; Humidity, relative; LATITUDE; LONGITUDE; Methane; POS533/1; POS533-track; Poseidon; Position; Pressure, atmospheric; Ship speed; Ships weather station; Temperature, air; Temperature, water; Underway cruise track measurements; Wind direction, relative; Wind direction, true; Wind speed, relative; Wind speed, true
    Type: Dataset
    Format: text/tab-separated-values, 2480685 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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