Analysis For Climatic Characteristics Of Liaoning Precipitation Anomalies And It's Impact Factors

Based on the baseline climatic characteristics analysis of precipitation in Liaoning, the discovery is then chiefly to study the effect of the corresponding period circulation and prophase SSTA on rainfall in flood season in Liaoning .Some conclusions as followed:(1)There are many obvious differences in climatic characteristics between eastern and western parts of Liaoning .precipitation decrease yearly . The precipitation anomalies take place mostly in flood season and it's spatial distribution vary with the changes of decades . (2)The precipitation shows periodic variation of 2-4 years in the four seasons and significant 10-12 years periodic variation in summer and flood season.(3) Liaoning flood season precipitation anomalies in phase with HuaBei and DongBei ,Jiangnan inverse . (4)Flood season precipitation anomalies has a good correlations with southwest and southeast summer monsoon , polar vortex , west wind trough and west Pacific high (5)The SSTA anomalies of West Pacific Key regions combine with south Atlantic Key regions has a good predict to the flood season precipitation anomalies in Liaoning areas. The periodic variation of SSTA of the two Key regions combine reflect vary length periodic variation of flood season precipitation anomalies in Liaoning areas.