Hydrodynamic reanalysis of water temperature and salinity in the Baltic Sea using the PM3D model - Open Research Data - Bridge of Knowledge

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Hydrodynamic reanalysis of water temperature and salinity in the Baltic Sea using the PM3D model

Description

The dataset contains the results of numerical modeling of water temperature and salinity in the Baltic Sea since 1998. A long-term reanalysis was performed using the three-dimensional hydrodynamic model PM3D (Kowalewski and Kowalewska-Kalkowska, 2017), a new version of the M3D model (Kowalewski, 1997). A numerical dynamic-thermodynamic model of sea ice (Herman et al. 2011) was coupled to the analysis of ice conditions variability.

The model is based on the Princeton Ocean Model (POM) developed at Princeton University (Blumberg and Mellor, 1987). Like POM, the M3D/PM3D model uses the Mellor-Yamada turbulence scheme and sigma vertical coordinates. The simulation was carried out in a rectangular grid of 3' (latitude) and 6' (longitude) resolution. The spatial resolution was 3 nautical miles, i.e. about 5.5 km. An open boundary was located between the Skagerrak and the Kattegat along the parallel connecting Skagen and Göteborg, where the water exchange with the North Sea takes place. A radiation condition based on Somerfield’s concept for velocities  vertically averaged and normal to the boarder  plane was applied. Weather forcing since 1998 was carried out using the results of operational numerical forecasts conducted by ICM University of Warsaw using the Unified Model (UM) developed by Met Office. The PM3D model uses the assimilation of sea surface temperature from the satellite (SST) and measurements of salinity and water temperature from ships at standard depths as part of ICES monitoring. 

The spatial distribution of water temperature and salinity was recorded twice a day, at a depth of 0 m, 5 m, 10 m, 15 m, 20 m, 30 m,  40 m, 50 m and 60 m in the model's computational grid in unproiected form (LatLong, WGS 84, EPSG: 4326). The validation of the modeling results for the period 1958-2007 showed a root mean square error (RMSE) of the water temperature from 0.9 to 1.4 °C, and in the case of salinity RMSE was from 0.16 to 0.5 psu for various stations in the Baltic Sea (Jędrasik i Kowalewski, 2019).

Illustration of the publication
Illustration of the publication

Surface temperature and salinity on the first day of reanalysis

Dataset file

Baltic_temperature_salinity_1998-2020.zip
8.8 GB, S3 ETag 2c72e4f12e720d60b27318ebb274fc4f-18, downloads: 92
The file hash is calculated from the formula
hexmd5(md5(part1)+md5(part2)+...)-{parts_count} where a single part of the file is 512 MB in size.

Example script for calculation:
https://github.com/antespi/s3md5
download file Baltic_temperature_salinity_1998-2020.zip

File details

License:
Creative Commons: by-nc-sa 4.0 open in new tab
CC BY-NC-SA
Non-commercial - Share-alike
Software:
Software for Manipulating or Displaying NetCDF Data

Details

Year of publication:
2021
Verification date:
2021-08-31
Creation date:
2021
Dataset language:
English
Fields of science:
  • Earth and related environmental sciences (Natural sciences)
DOI:
DOI ID 10.34808/ccxq-pz51 open in new tab
Series:
Verified by:
Gdańsk University of Technology

Keywords

References

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