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  • 2020-2024  (3)
  • 2020-2023  (1)
  • 1980-1984
  • 2021  (4)
  • 2021  (4)
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  • 2020-2024  (3)
  • 2020-2023  (1)
  • 1980-1984
  • 2020-2022  (8)
Year
  • 1
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    Properties of surface water masses in the Laptev and the East Siberian seas in summer 2018 from in situ and satellite data (2021)
    Copernicus Publications (EGU)
    In:  Ocean Science, 17 (1). pp. 221-247.
    Details
    Publication Date: 2022-01-07
    Description: Variability of surface water masses of the Laptev and the East Siberian seas in August–September 2018 is studied using in situ and satellite data. In situ data were collected during the ARKTIKA-2018 expedition and then complemented with satellite-derived sea surface temperature (SST), salinity (SSS), sea surface height, wind speed, and sea ice concentration. The estimation of SSS fields is challenging in high-latitude regions, and the precision of soil moisture and ocean salinity (SMOS) SSS retrieval is improved by applying a threshold on SSS weekly error. For the first time in this region, the validity of DMI (Danish Meteorological Institute) SST and SMOS SSS products is thoroughly studied using ARKTIKA-2018 expedition continuous thermosalinograph measurements and conductivity–temperature–depth (CTD) casts. They are found to be adequate to describe large surface gradients in this region. Surface gradients and mixing of the river and the sea water in the ice-free and ice-covered areas are described with a special attention to the marginal ice zone at a synoptic scale. We suggest that the freshwater is pushed northward, close to the marginal ice zone (MIZ) and under the sea ice, which is confirmed by the oxygen isotope analysis. The SST-SSS diagram based on satellite estimates shows the possibility of investigating the surface water mass transformation at a synoptic scale and reveals the presence of river water on the shelf of the East Siberian Sea. The Ekman transport is calculated to better understand the pathway of surface water displacement on the shelf and beyond.
    Type: Article , PeerReviewed
    Format: text
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  • 2
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    Steric height and bottom pressure water equivalent derived from mooring data at the shelf break north of the Arctic Cape (2021)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: This dataset has been created as a comparative dataset for assessment of satellite-derived sea level anomaly in the publication Doglioni et al. (2022). The dataset includes two time series, one of steric height and another of bottom pressure equivalent height, respectively computed from moored temperature and salinity data and ocean bottom pressure records at the Arctic Cape shelf break. Data were collected between October 2015 and July 2018 in the framework of the project Changing Arctic Transpolar System (CATS mooring AK3). Temperature and salinity were linearly interpolated between the shallowest sensor (50 m) and the deepest sensor (1448 m) onto a regular pressure grid with vertical spacing of 2 m. Constant extrapolation was performed above the shallowest sensor and no extrapolation was performed below the deepest sensor. Temperature and salinity vertical profiles were converted into density profiles using the Matlab sw_dens routine (Fofonoff & Millard, 1983). Bottom pressure records are detided using the Matlab routine t_tide (Pawlowicz et al., 2002) and instrumental drifts were removed. Steric height and bottom pressure equivalent height time series were averaged into monthly time steps.
    Keywords: Arctic Cape; CATS; CATS_AK3; CATS - The Changing Arctic Transpolar System; Helmholtz-Verbund Regionale Klimaänderungen = Helmholtz Climate Initiative (Regional Climate Change); Mooring (long time); MOORY; Ocean bottom pressure; RACE; Regional Atlantic Circulation and global Change; REKLIM; Steric height
    Type: Dataset
    Format: application/x-hdf, 18.1 kBytes
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  • 3
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    Steric height and bottom pressure water equivalent derived from mooring data at the Laptev Sea continental slope (2021)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: This dataset has been created as a comparative dataset for assessment of satellite-derived sea level anomaly in the publication Doglioni et al. (2022). The dataset includes two time series, one of steric height and another of bottom pressure equivalent height, respectively computed from moored temperature and salinity data and ocean bottom pressure records at the Laptev Sea continental slope. Data were collected between September 2013 and August 2015 in the framework of the project Nansen and Amundsen Basins Observations System II (NABOS-II moorings M1_4 and M1_6, Polyakov et al., 2019). Temperature and salinity were linearly interpolated between the shallowest sensor (26 m) and the deepest sensor (700 m) onto a regular pressure grid with vertical spacing of 2 m. Constant extrapolation was performed above the shallowest sensor and no extrapolation was performed below the deepest sensor. Temperature and salinity vertical profiles were converted into density profiles using the Matlab sw_dens routine (Fofonoff & Millard, 1983). Bottom pressure records are detided using the Matlab routine t_tide (Pawlowicz et al., 2002) and instrumental drifts were removed. Steric height and bottom pressure equivalent height time series were averaged into monthly time steps.
    Keywords: Helmholtz-Verbund Regionale Klimaänderungen = Helmholtz Climate Initiative (Regional Climate Change); Laptev Sea; M1_4; M1_6; Mooring (long time); MOORY; NABOS-II; Nansen and Amundsen Basins Observations System II; Ocean bottom pressure; RACE; Regional Atlantic Circulation and global Change; REKLIM; Steric height
    Type: Dataset
    Format: application/x-hdf, 17.9 kBytes
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  • 4
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    Microstructure measurements raw data during Akademik Tryoshnikov cruise AT2018 to the Arctic Ocean (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: Shipboard loosely-tethered free-falling microstructure (MSS) measurements were carried out during expedition Transdrift-XXIV to the eastern Arctic Ocean onboard the Akademik Tryoshnikov (AT2018). The expedition was jointly organized between the US-Russian NABOS (Nansen and Amundsen Basin Observational System), the German-Russian CATS (Changing Arctic Transpolar System, funded by BMBF), and the TICE-project funded by the Alfred-Wegener-Institute. 236 stations were carried out between 25 August and 23 September 2018. The profiler MSS90L manufactured by Sea and Sun Technology samples at 1024 Hz and was equipped with temperature, salinity, shear, and fluorescence sensors.
    Keywords: Akademik Tryoshnikov; Arctic Ocean; AT18_009_2; AT18_009_5; AT18_016_2; AT18_017_1; AT18_018_2; AT18_019_2; AT18_020_2; AT18_022_4; AT18_023_2; AT18_024_2; AT18_025_4; AT18_044_2; AT18_045_2; AT18_046_2; AT18_047_3; AT18_048_2; AT18_049_2; AT18_050_2; AT18_060_3; AT18_061_2; AT18_062_2; AT18_063_2; AT18_085_4; AT18_093_2; AT18_094_2; AT18_095_2; AT18_102; AT18_103; AT18_116_2; AT18_117_2; AT18_118_2; AT18_119_2; AT18_120_2; AT18_122_2; AT2018, TICE, NABOS; AWI_PhyOce; Binary Object; Binary Object (File Size); Binary Object (Media Type); Date/Time of event; Date/Time of event 2; Event label; Laptev Sea; Latitude of event; Latitude of event 2; Longitude of event; Longitude of event 2; microstructure; Micro structure probe; MSS; ocean heat flux; Physical Oceanography @ AWI; System Laptev-Sea: Transdrift; TRANSDRIFT; Transdrift-XXIV; turbulence
    Type: Dataset
    Format: text/tab-separated-values, 232 data points
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