BOOS > Data Assimilation

Data Assimilation

The BOOS Data Assimilation Working Group (DAWG) is formed by 6 marine data assimilation groups from Denmark, Estonia, Finland, Germany and Sweden. Currently, DA schemes are applied for production of operational forecast and reanalysis at BSH, DMI, TalTech and SMHI, for national and/or CMEMS BAL MFC service. Most of the partners use Parallel Data Assimilation Framework (PDAF) including a variety of ensemble filters. Others use variational and/or Ensemble-Variational methods. The PDAF is developed by AWI, which is also part of BOOS DA cooperation. The assimilated parameters include SST, T/S profiles, sea level, sea ice, satellite chl-a and nutrient-oxygen profiles. The working group uses a virtual coding environment and has weekly group meetings. Current status of BOOS DA WG is shown in Tab. 1.

Table 1. Current status of data assimilation collaboration activities in BOOS DA-WG.

Scheme Application Type Products variables assimilated Partner Model system used
PDAF-LSEIK (with EoF) Reanalysis opr. BALMFC RAN SST, T/S SMHI NEMO3.6
Sea Level DA R&D SSH, SI, Chl-a SMHI NEMO3.6
PDAF-LESTKF forecast opr. BALMFC NRT SST, T/S, SIC SMHI NEMO4
Reanalysis opr. BALMFC RAN SST, T/S DMI NEMO4
Coupled PHY-BGC DA (PDAF-OMI) R&D SST, T/S, SIC DO/N/P AWI, BSH, DMI, SMHI NEMO4-ERGOM
EnVAR (3D/4D) Sea ice DA R&D SIC, SIT SMHI NEMO4
HF radar currents R&D Currents SMHI NEMO3.6
Forecast Opr. SMHI forecast SST, T/S SMHI NEMO4
PDAF Coastal observatory R&D HF radar currents HEREON NEMO?
EOF-based T/S DA opr. MSI forecast T, S TalTech NEMO4
PDAF-HBM SST DA Opr. BSH forecast SST BSH, AWI HBM
Coupled DA (PDAF-OMI) R&D T/S, BGC, SIC, SIT BSH, AWI HBM
PDAF Sea Level DA R&D Sea level 5Hz TalTech NEMO4

 

For more details:

  • 2020/21 DAWG annual report
  • 2021 DAWG activity summary
  • 2022 DAWG activity summary
  • 2023 DAWG activity summary
  • Member presentations & publications