Activity Characteristics Of Tibetan Plateau Vortex And The Connection Of Tibetan Plateau Vortex And Surface Sensitive Heat

Tibetan Plateau Vortex is the most important weather system on the Tibetan Plateau.Its occurrence and movement have an important impact on weather and climate of the plateau and East Asia.In this study,the activity characteristics of the vortex in 1979-2016 are investigated by Using CFSR high precision reanalysis data and the Tibetan Plateau Vortex almanac.2008 is selected as the characteristic year.the Tibetan Plateau Vortex objective recognition standard which is based on the vortex artificial recognition standard is formulated and modified by analyzing vortex in 2008.Analyze the Characteristics of Vortex Activity over the Tibetan Plateau from 1979 to 2016,research its relationship with surface sensitive heat.The results show that,the statistics results of the study are similar to the almanac in 2008.The recognized location of the vortex in 2009 is closer to the almanac than the former scholars.In the last 38 years,the vortex has generated 71 per year on average,the amounts first decrease and increase later,but the overall trend shows an increase.The initial location is mainly distributed in the northwest of Plateau.The secondary initial location is in the south of himaalaya,it is wet initial location among them.Sensible heat beneficial to the addition of Frequency of the Tibetan Plateau Vortex,it becomes enhanced should promote the appearance of the Tibetan Plateau Vortex in the nighttime and it becomes weakened will Predict its direction of movement.The vortexes in he northwest of Plateau are mainly generated by the sensible heat effect.The vortexes in the eastern part of the plateau and in the west of Sichuan are generated by the combined effect of sensible heat and ground force.