EGU2020-3305, updated on 16 May 2023
https://doi.org/10.5194/egusphere-egu2020-3305
EGU General Assembly 2020
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Optimizing COSMO_REA6 reanalysis radiation flux for a high resolution coastal ocean model

Martin Vodopivec and Matjaž Ličer
Martin Vodopivec and Matjaž Ličer
  • National Institute of Biology, Marine Biology Station, Piran, Slovenia (martin.vodopivec@nib.si)

When modelling coastal areas in high spatial resolution, it is also essential to obtain atmospheric forcing with suitably fine grid. The complex coastline and coastal orography exert strong influence on atmospheric fields, wind in particular, and the east Adriatic coast with numerous islands and coastal mountain ridges is a fine example. We decided to use a high resolution COSMO atmospheric reanalysis for our long term ROMS_AGRIF hindcasts, but in our initial experiments we found out that the atmospheric model significantly underestimates the short wave flux over the Mediterranean Sea, probably due to overestimation of high clouds formation and erroneous sea surface temperature used as a boundary condition. We explore different atmospheric models and different combinations of fluxes - direct, diffuse and clear sky solar radiation and combinations of fluxes from different atmospheric models (eg. ERA5). We compare them with solar irradiance observations at a coastal meteorological station and run year-long simulations to compare model sea surface temperature (SST) with satellite observations obtained from Coprenicus Marine Environment Monitoring Service.

How to cite: Vodopivec, M. and Ličer, M.: Optimizing COSMO_REA6 reanalysis radiation flux for a high resolution coastal ocean model, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-3305, https://doi.org/10.5194/egusphere-egu2020-3305, 2020.

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