Institute of Atmospheric Physics
According to the NFSV-type SST forcing errors of 12 TCs, the optimal target observation deployment of sea surface temperature is identified through OSSEs. The sensitive area of NFSV-type SST forcing errors occurs along the track of TCs and during the intensification phase of TCs. The results of OSSEs show that, the additional observations deployed in the sensitive area with 90 km intervals improve the simulation of TC intensity effectively. Compared with observations deployed in non-sensitive areas, the target observations in the sensitive areas of NFSV-type SST forcing errors can improve the simulation of TC intensity more effectively. When the local target observation area in non-sensitive area reaching to the sensitive area, the additional observations will improve the simulation of TC intensity gradually. Especially, the further experiments show that the simulation of TC intensity improve more significantly when the target observations deployed during the intensification phase corresponding to the periods of the occurrence of the large value region of NFSV. Therefore, the additional observations in the target area identified by NFSV-type SST forcing errors can improve the simulation of TC intensity most effectively, and the suitable deployment of observations in the sensitive area during the sensitive periods is the most economical observation strategy.