HIRHAM–NAOSIM simulations for the periods March/April 2018 and March to September 2020

This dataset group comprises subsets of two HIRHAM–NAOSIM simulations for the periods March/April 2018 and March to September 2020, as used in the paper “Observations and modeling of areal surface albedo and surface types in the Arctic” by Jäkel et al. (2024, https://doi.org/10.5194/tc-18-1185-2024).

The simulation for 2018 was originally carried out for the period from January to September 2018. It was started from rest with temperature, salinity, ice thickness, and ice concentration fields from ORAS5. The simulation for 2020 was originally carried out for the period 2019-2020 and initialized with fields from 1 January 2019, 00 UTC of an earlier long-term simulation. The prognostic atmospheric fields of the two simulations were nudged to the corresponding ERA5 fields with a vertically uniform nudging time scale of 16.67 h. Sea ice and ocean fields were initialized with fields from an earlier long-term simulation. Further details on the simulations are given in "On the importance to consider the cloud dependence in parameterizing the albedo of snow on sea ice" by Foth et al. (2023, https://doi.org/10.5194/egusphere-2023-634).