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  • 2015-2019  (30)
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  • 1
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    Validation of SMOS sea ice thickness retrieval in the northern Baltic Sea (2015)
    Taylor & Francis
    In:  Tellus A: Dynamic meteorology and oceanography, 67 . p. 24617.
    Details
    Publication Date: 2015-08-03
    Description: The Soil Moisture and Ocean Salinity (SMOS) mission observes brightness temperatures at a low microwave frequency of 1.4 GHz (L-band) with a daily coverage of the polar regions. L-band radiometry has been shown to provide information on the thickness of thin sea ice. Here, we apply a new emission model that has previously been used to investigate the impact of snow on thick Arctic sea ice. The model has not yet been used to retrieve ice thickness. In contrast to previous SMOS ice thickness retrievals, the new model allows us to include a snow layer in the brightness temperature simulations. Using ice thickness estimations from satellite thermal imagery, we simulate brightness temperatures during the ice growth season 2011 in the northern Baltic Sea. In both the simulations and the SMOS observations, brightness temperatures increase by more than 20 K, most likely due to an increase of ice thickness. Only if we include the snow in the model, the absolute values of the simulations and the observations agree well (mean deviations below 3.5 K). In a second comparison, we use high-resolution measurements of total ice thickness (sum of ice and snow thickness) from an electromagnetic (EM) sounding system to simulate brightness temperatures for 12 circular areas. While the SMOS observations and the simulations that use the EM modal ice thickness are highly correlated (r2=0.95), the simulated brightness temperatures are on average 12 K higher than observed by SMOS. This would correspond to an 8-cm overestimation of the modal ice thickness by the SMOS retrieval. In contrast, if the simulations take into account the shape of the EM ice thickness distributions (r2=0.87), the mean deviation between simulated and observed brightness temperatures is below 0.1 K.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.3402/tellusa.v67.24617
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Sea ice drift, surface temperature, and barometric pressure from autonomous measurements from buoy 2015C7, deployed during the Norwegian Young sea ICE cruise N-ICE 2015 (2017)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Description: Sea ice drift, surface temperature, and barometric pressure were measured by the Compact Air-Launched Ice Beacon (CALIB) 2015C7 drifting on Arctic sea ice. The buoy was deployed during the Norwegian Young sea ICE cruise (N-ICE 2015) project. The time series describes the position and additional parameters of the buoy between 20 Apr 2015 and 06 Jun 2015 in sample intervals of 1 hour. The data set has been processed, including the removal of obvious inconsistencies (missing values).
    Keywords: 2015C7; Arctic Ocean; AWI_SeaIce; Buoy, Compact Air-Launched Ice Beacon; CALIB; DATE/TIME; LATITUDE; LONGITUDE; Pressure, atmospheric; Sea Ice Physics @ AWI; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 2278 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Sea ice drift, surface temperature, and barometric pressure from autonomous measurements from buoy 2015C5, deployed during the Norwegian Young sea ICE cruise N-ICE 2015 (2017)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Description: Sea ice drift, surface temperature, and barometric pressure were measured by the Compact Air-Launched Ice Beacon (CALIB) 2015C5 drifting on Arctic sea ice. The buoy was deployed during the Norwegian Young sea ICE cruise (N-ICE 2015) project. The time series describes the position and additional parameters of the buoy between 10 Feb 2015 and 18 Mar 2015 in sample intervals of 1 hour. The data set has been processed, including the removal of obvious inconsistencies (missing values).
    Keywords: 2015C5; Arctic Ocean; AWI_SeaIce; Buoy, Compact Air-Launched Ice Beacon; CALIB; DATE/TIME; LATITUDE; LONGITUDE; Pressure, atmospheric; Sea Ice Physics @ AWI; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 1752 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Sea ice drift, surface temperature, and barometric pressure from autonomous measurements from buoy 2015C1, deployed during the Norwegian Young sea ICE cruise N-ICE 2015 (2017)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Description: Sea ice drift, surface temperature, and barometric pressure were measured by the Compact Air-Launched Ice Beacon (CALIB) 2015C1 drifting on Arctic sea ice. The buoy was deployed during the Norwegian Young sea ICE cruise (N-ICE 2015) project. The time series describes the position and additional parameters of the buoy between 28 Jan 2015 and 27 Mar 2015 in sample intervals of 1 hour. The data set has been processed, including the removal of obvious inconsistencies (missing values).
    Keywords: 2015C1; Arctic Ocean; AWI_SeaIce; Buoy, Compact Air-Launched Ice Beacon; CALIB; DATE/TIME; LATITUDE; LONGITUDE; Pressure, atmospheric; Sea Ice Physics @ AWI; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 2786 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Sea ice drift, surface temperature, and barometric pressure from autonomous measurements from buoy 2015C4, deployed during the Norwegian Young sea ICE cruise N-ICE 2015 (2017)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Description: Sea ice drift, surface temperature, and barometric pressure were measured by the Compact Air-Launched Ice Beacon (CALIB) 2015C4 drifting on Arctic sea ice. The buoy was deployed during the Norwegian Young sea ICE cruise (N-ICE 2015) project. The time series describes the position and additional parameters of the buoy between 17 Feb 2015 and 15 Mar 2015 in sample intervals of 1 hour. The data set has been processed, including the removal of obvious inconsistencies (missing values).
    Keywords: 2015C4; Arctic Ocean; AWI_SeaIce; Buoy, Compact Air-Launched Ice Beacon; CALIB; DATE/TIME; LATITUDE; LONGITUDE; Pressure, atmospheric; Sea Ice Physics @ AWI; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 1248 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Sea ice drift, surface temperature, and barometric pressure from autonomous measurements from buoy 2015C6, deployed during the Norwegian Young sea ICE cruise N-ICE 2015 (2017)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Description: Sea ice drift, surface temperature, and barometric pressure were measured by the Compact Air-Launched Ice Beacon (CALIB) 2015C6 drifting on Arctic sea ice. The buoy was deployed during the Norwegian Young sea ICE cruise (N-ICE 2015) project. The time series describes the position and additional parameters of the buoy between 20 Jan 2015 and 21 Jan 2015 in sample intervals of 1 hour. The data set has been processed, including the removal of obvious inconsistencies (missing values).
    Keywords: 2015C6; Arctic Ocean; AWI_SeaIce; Buoy, Compact Air-Launched Ice Beacon; CALIB; DATE/TIME; LATITUDE; LONGITUDE; Pressure, atmospheric; Sea Ice Physics @ AWI; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 32 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Sea ice drift, surface temperature, and barometric pressure from autonomous measurements from buoy 2015C3, deployed during the Norwegian Young sea ICE cruise N-ICE 2015 (2017)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Description: Sea ice drift, surface temperature, and barometric pressure were measured by the Compact Air-Launched Ice Beacon (CALIB) 2015C3 drifting on Arctic sea ice. The buoy was deployed during the Norwegian Young sea ICE cruise (N-ICE 2015) project. The time series describes the position and additional parameters of the buoy between 20 Apr 2015 and 03 Jun 2015 in sample intervals of 1 hour. The data set has been processed, including the removal of obvious inconsistencies (missing values).
    Keywords: 2015C3; Arctic Ocean; AWI_SeaIce; Buoy, Compact Air-Launched Ice Beacon; CALIB; DATE/TIME; LATITUDE; LONGITUDE; Pressure, atmospheric; Sea Ice Physics @ AWI; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 2122 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Sea ice drift, surface temperature, and barometric pressure from autonomous measurements from buoy 2015C2, deployed during the Norwegian Young sea ICE cruise N-ICE 2015 (2017)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Description: Sea ice drift, surface temperature, and barometric pressure were measured by the Compact Air-Launched Ice Beacon (CALIB) 2015C1 drifting on Arctic sea ice. The buoy was deployed during the Norwegian Young sea ICE cruise (N-ICE 2015) project. The time series describes the position and additional parameters of the buoy between 21 Jan 2015 and 16 Mar 2015 in sample intervals of 1 hour. The data set has been processed, including the removal of obvious inconsistencies (missing values).
    Keywords: 2015C2; Arctic Ocean; AWI_SeaIce; Buoy, Compact Air-Launched Ice Beacon; CALIB; DATE/TIME; LATITUDE; LONGITUDE; Pressure, atmospheric; Sea Ice Physics @ AWI; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 2606 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2015S26, deployed during the Norwegian Young sea ICE cruise N-ICE 2015 (2015)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2024-01-31
    Description: Snow height was measured by the Snow Depth Buoy 2015S26, an autonomous platform, drifting on Arctic sea ice, deployed during the Norwegian Young sea ICE cruise (N-ICE 2015) project. The resulting time series describes the evolution of snow depth as a function of place and time between 05 Feb 2015 and 21 Feb 2015 in sample intervals of 1 hour. The Snow Depth Buoy consists of four independent sonar measurements representing the area (approx. 10 m**2) around the buoy. The buoy was installed on first year ice. In addition to snow depth, geographic position (GPS), barometric pressure, air temperature, and ice surface temperature were measured. Negative values of snow depth occur if surface ablation continues into the sea ice. Thus, these measurements describe the position of the sea ice surface relative to the original snow-ice interface. Differences between single sensors indicate small-scale variability of the snow pack around the buoy. The data set has been processed, including the removal of obvious inconsistencies (missing values). Records without any snow depth may still be used for sea ice drift analyses.
    Keywords: 2015S26; Arctic Ocean; AWI_SeaIce; BUOY_SNOW; DATE/TIME; LATITUDE; LONGITUDE; Pressure, atmospheric; Sea Ice Physics @ AWI; Snow buoy; Snow height; Temperature, air; Temperature, technical
    Type: Dataset
    Format: text/tab-separated-values, 2359 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2015S28, deployed during the Norwegian Young sea ICE cruise N-ICE 2015 (2017)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2024-01-31
    Description: Snow height was measured by the Snow Depth Buoy 2015S28, an autonomous platform, drifting on Arctic sea ice, deployed during the Norwegian Young sea ICE cruise (N-ICE 2015) project. The resulting time series describes the evolution of snow depth as a function of place and time between 21 Apr 2015 and 11 Jun 2015 in sample intervals of 1 hour. The Snow Depth Buoy consists of four independent sonar measurements representing the area (approx. 10 m**2) around the buoy. The buoy was installed on first year ice. In addition to snow depth, geographic position (GPS), barometric pressure, air temperature, and an internal ice temperature were measured. Negative values of snow depth occur if surface ablation continues into the sea ice. Thus, these measurements describe the position of the sea ice surface relative to the original snow-ice interface. Differences between single sensors indicate small-scale variability of the snow pack around the buoy. The data set has been processed, including the removal of obvious inconsistencies (missing values). Records without any snow depth may still be used for sea ice drift analyses.
    Keywords: 2015S28; Arctic Ocean; AWI_SeaIce; BUOY_SNOW; DATE/TIME; LATITUDE; LONGITUDE; Pressure, atmospheric; Sea Ice Physics @ AWI; Snow buoy; Snow height; Temperature, air; Temperature, technical
    Type: Dataset
    Format: text/tab-separated-values, 9526 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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