The ship-based experiment MOSAiC 2019/2020 was carried out during a full year in the Arctic. The data set includes simulation data of near-surface variables for the MOSAiC winter period (Nov. 2019-April 2020). The regional climate model CCLM was used in a forecast mode (nested in ERA5) for the whole Arctic with 15 km resolution and is run with different configurations of sea ice data. These include the standard sea ice concentration taken from passive microwave data (AMSR) with around 6 km resolution, sea ice concentration from Moderate Resolution Imaging Spectroradiometer (MODIS) thermal infrared data and MODIS sea ice lead data with 1 km resolution for the winter period. Model output is available every 1h. In the vertical, the model extends up to 22 km with 60 vertical levels. In addition to near-surface variables, integrated moisture and temperature for the lowest 2km were calculated. Values are grid-box averages at the ship position.
Coordinates of the nearest CCLM grid point (1h data) File name: C15_Lat_Lon_winter.txtFile description:DATE month day hourJUL Julian day starting on 1 October 2019JULyear Julian day starting on 1 JanuaryLAT Latitude north degressLON Longitude east degrees---CCLM near-surface data (1h)File names: C15_near-surface_winter.txt (sea ice from AMSR data) and C15MOD0_near-surface_winter.txt (sea ice from MODIS data)File descriptionDATE month day hourJUL Julian day starting on 1 October 2019JULyear Julian day starting on 1 JanuaryMSLP Pressure in hPaT Temperature in °C at 2m, 5m, 30mT0 surface temperature in °CRH2m relative humidity at 2m in %FF wind speed at 5m, 10m, 30m in m/sDD wind direction at 10m and 30m in degKd/Ku shortwave downward/upward radiation in W/m²Ld/Lu longwave downward/upward radiation in W/m²Q0 net radiation in W/m²SIC sea ice concentrationHice grid-scale ice thickness in mTIT thin ice thickness in m (subgrid-scale)---CCLM Integrated humidity and temperature data (1h data)File name: C15MOD0_near-surface_winter.txt (sea ice from MODIS data)File descriptionJUL Julian day starting on 1 October 2019JULyear Julian day starting on 1 JanuaryIWV2000 Integrated water vapour 0-2km in kg/m²Tm2000 mean temperature 0-2km in °CQm2000 mean specific humidity 0-2km in g/kgQCIT total integrated (0-22km) cloud water and cloud ice content in kg/m²
