ERA-5 reanalysis results interpolated onto the five-minute average cruise track of the Antarctic Circumnavigation Expedition (ACE) during the austral summer of 2016/2017.
ERA-5 fields at 1-hour temporal and grid size of  0.25° x 0.25° (0.5° x 0.5° for wave variables) have been downloaded from https://cds.climate.copernicus.eu/api/v2/resources/reanalysis-era5-single-levels
The data are interpolated using two methods:
'nearest': the value of the nearest ERA-5 grid cell is use
'linear': the values from the nearest grid cells in space and time are linearly interpolated to the [date_time, latitude, longitude] coordinate of the ship 

Data files: era5-on-cruise-track-5min-legs0-4-nearest.csv, era5-on-cruise-track-5min-legs0-4-linear.csv

date_time: date and time of one minute averaging interval (center) in ISO 8601 format YYYY-MM-DDThh:mm:ss+00:00 [UTC]
latitude: average latitude of the ship [degree_north]
longitude: average longitude of the ship [degree_east]
10m_u_component_of_neutral_wind: (u10n) 10m u component of neutral wind (in East direction) [m s-1]
10m_v_component_of_neutral_wind: (v10n) 10m v component of neutral wind (in North direction) [m s-1]
10m_u_component_of_wind: (u10) 10m u component of wind (in East direction) [m s-1]
10m_v_component_of_wind: (v10) 10m v component of wind (in North direction) [m s-1]
air_density_over_the_oceans: (p140209) air density over the oceans [kg m-3]
2m_dewpoint_temperature: (d2m) 2m dewpoint temperature [K]
2m_temperature: (t2m) 2m air temperature [K]
boundary_layer_height: (blh) boundary layer height [m]
cloud_base_height: (cbh) cloud base height [m]
convective_precipitation: (cp) convective precipitation [m]
convective_snowfall: (csf) convective snowfall [m]
friction_velocity: (zust) friction velocity [m s-1]
high_cloud_cover: (hcc) high cloud cover (0 ... 1)
land_sea_mask: (lsm) land sea mask (0 ... 1)
large_scale_precipitation: (lsp) large scale precipitation [m]
large_scale_snowfall: (lsf) large scale snowfall [m]
low_cloud_cover: (lcc) low cloud cover (0 ... 1)
mean_direction_of_total_swell: (mdts) mean direction of total swell [degrees]
mean_direction_of_wind_waves: (mdww) mean direction of wind waves [degrees]
mean_square_slope_of_waves: (msqs) mean square slope of waves [dimensionless]
mean_surface_latent_heat_flux: (mslhf) mean surface latent heat flux [W m-2]
mean_surface_sensible_heat_flux: (msshf) mean surface sensible heat flux [W m-2]
medium_cloud_cover: (mcc) medium cloud cover (0 ... 1)
peak_wave_period: (pp1d) peak wave period [s]
period_corresponding_to_maximum_individual_wave_height: (tmax) period corresponding to maximum individual wave height [s]
sea_ice_cover: (siconc) sea ice cover (0 ... 1)
sea_surface_temperature: (sst) sea surface temperature [K]
significant_height_of_total_swell: (shts) significant height of total swell [m]
significant_height_of_wind_waves: (shww) significant height of wind waves [m]
skin_temperature: (skt) skin temperature [K]
total_cloud_cover: (tcc) total cloud cover (0 ... 1)
total_column_cloud_ice_water: (tciw) total column cloud ice water [kg m-2]
total_column_cloud_liquid_water: (tclw) total column cloud liquid water [kg m-2]