Representation of MISOs in CGCM is more reasonable compared to AGCM. The realistic SST–rainfall relationship on sub-seasonal range is considered as an important indicator of the model's fidelity in simulating as well as predicting the MISOs during the summer monsoon season. Experiment has been performed with CFST126 and the atmospheric component of the same i.e. GFSv2 forced with bias-corrected daily SST (hereafter GFSbc). It is clear that the more realistic local SST–rainfall lag–lead relationship in the CFST126 model compared to GFSbc is leading to the more realistic rainfall amplitude in CFST126 associated with MISO which may impart less error on the circulation [Figure a, b] .
Since the SST–rainfall relationship is important in capturing the phase propagation of MISOs, CFST126 is able to capture the northward phase propagation more efficiently [Figure a, b, c] .
However, CFST126 shows dry bias in rainfall over the Indian land mass and although reduced to some extent, it is present in the GFSbc also [Figure a, b, c, d, e] .