JJAS Mean Bias
Serial hindcast experiments have been performed for the years 2001-2012 using CFST126, CFST382 and GFSbc. The climatological bias in precipitation during the months JJAS in the pentad lead 1- 4 is shown in Figure for CFST126, GFSbc and CFST382. It is clear from the figure that CFST126 shows a dry bias over the Indian land mass which becomes prominent with the forecast lead and expands to the nearby oceanic regions. The dry bias over the Indian land region in GFSv2bc is slightly reduced in all the lead pentads compared to CFST126. The climatological precipitation biases are further improved in CFST382 run in all the four lead pentads .