I want to use GFS 0.5 degree data to do 2013 whole year simulation through WRF, but I found that some GFS data files are missing in the download website, in some days there are only three or two GFS files(there is no 12h and 18h GFS data files), not complete four GFS files(every 6 hours) every day. I want to get whole year hourly output simulation results, so now how do I do? Can I use the close GFS files to replace the missing GFS files? If I can use this method, how can i change the time in GFS file? or do you have other method or suggestions?
thank you very much.