Studies of regional atmospheric pressure excitation function of polar motion

EXTENDED ABSTRACT. It is known from earlier studies such as Salstein and Rosen (1989), Nastula and Salstein (1999) and Nastula et al. 2003, that isolated regions such as North Eurasia are very important in driving polar motion on seasonal and subseasonal time scales. The paper presents correlations and covariances between the regional atmospheric pressure excitation functions of polar motion and global geodetic excitation function of polar motion computed in two spectral bands, annual and semi-annual ones in two sets of geographic regions of different sizes. In the paper the following two sets of regional atmospheric data are used: