ON MAINTENANCE OF BLOCKING ANTICYCLONES OF NORTHERN HEMISPHERE PART 2: MECHANISM OF EDDY FORCING AND PV ADVECTION BY MEAN FLOW

In this paper, formation of the potential vorticity (PV) tranfer by eddy in the Atlantic and Asia blocking cases and the advection of PV by mean flow in the Pacific blocking cases are invested.It has been shown that the propagation of eddy in diffluent flow (Shutts.1983) is not necessary for the formation of the eddy forcing.The interaction between mean flow and eddy is also strong within non-diffluent flow of north eastern part of the anticyclones and numerical experments suggest that it may also contribute to the formation of the eddy forcing.The formation of the advection of mean flow in the Pacific blocking cases has been shown to be related to forcing of the Qinghai-Xizang Plateau.