Abstract: Using temperature data in Qinghai province, monthly mean NCEP reanalysis data and circulation index from 1961 to 2012, characteristic of the spring temperature anomaly and its impact factors were analyzed.The results show that the spring temperature is in a significant increasing trend and has significant interdecadal variation.There are three types for variation of spring temperature, i.e.regional consistence type, east-west antiphase type and north-south antiphase type.There is obvious interdecadal variation for the former two types, while annual variation is significant for the north-south antiphase type.The key areas influencing the spring temperature anomaly are located in the Western Europe, Ural mountain, Qinghai plateau and its eastern region.Ural pressure ridge and east Asian trough influence directly the spring temperatute in Qinghai plateau.Also, the subtropical high and polar vortex index in Northern Hemisphere, Plateau height field are also the main impact factors of the spring temperature.At the same time, it has good response to anomaly of SST in the Somalia, the Arabian Sea, the Bay of Bengal of North Indian Ocean, the Northwest pacific and the Equatorial Pacific.It will be cold (warm) spring in Qinghai plateau when the SST in the above areas is low (high).

Key words: Qinghai Plateau, Temperature anomaly, Atmospheric circulation, Sea surface temperature anomaly