Abstract:On the basis of NCEP/NCAR reanalysis data and ERA40 reanalysis data, the spatiotemporal evolution characteristics of the zonal structure of the North Pacific storm track in winter are studied. Results show that the zonal structure of North Pacific storm track has evident interannual and interdecadal change characteristics. Two main zonal structure modes exist in North Pacific storm track, which are a consistent mode in the entire region("A" mode), and the east-west direction opposite mode ("B" mode). Moreover, the two main modes can be divided into four zonal anomalous types:consistently strong pattern ("A+" pattern), consistently weak pattern ("A-" pattern), weak east and strong west pattern ("B+" pattern), and strong east and weak west pattern ("B-" pattern). Furthermore, the zonal structures of the storm track are closely related to the frequency of the extreme low temperature in China, which means that the "A+" pattern("A-" pattern) correlates strongly to the less (more) extreme low temperature events in entire China, while "B+" pattern("B-" pattern) correlates strongly to the more(less) extreme low temperature in entire China.