Regression coefficients between Eurasian snow cover sequence and northern mid-upper troposphere geopotential height are used to disassociate the response of anomaly circulations to the snow cover,Evidence suggests that the regressiori response field can display the relation between the snow and circulations hut the amplitude of the correlation center as well,which is bigger in the mid troposphere with a strong equivalent barotropic structure in the mid-upper troposphere.The winter to summer circulations exhibit marked stationary planetary-scale wavetrains as(shown in the response field) NEUP and NPNA in winter,LEU and EANA in summer and differing slightly in spring.These wavetrains display branching with energy transmission as wave front and intercepted subtropically.