1.【XXXX_bc_ff_and_seaice.mat】The data is simulated Arctic sea fog frequency during 1979-2018 by using 6-hourly ERA-Interim data and Polar WRF. The fog results are bias corrected by ICOADS observations. The dimension of the data is 5*95*95, which means five fog-diagnosed method (SW99, FSL, UPP, G2006 and G2009), 95 lontitude and 95 latitude. In the paper, we only use SW99 method, which is the first fog-diagnosed method. 2.【ff_XXX_cmip5_best_model_XXXX_XXXX.mat】The data is projected Arctic sea fog frequency based on the "best" six models from CMIP5. 3.【Code for deriving shipping routes.zip】The code for designing shipping routes. More detail please sees the paper "Adapting to a Foggy Future along Trans-Arctic Shipping Routes".