1330号台风海燕路径北翘原因及其对华南影响.pdf

Advances in Geosciences 地球科学前沿, 2017, 7(2), 232-246 Published Online April 2017 in Hans. /journal/ag /10.12677/ag.2017.72025 Reason of No. 1330 Typhoon “Haiyan” Path North and the Influence of the Typhoon on South China Yating Jiang East China Normal University, Shanghai th th th Received: Apr. 6 , 2017; accepted: Apr. 26 , 2017; published: Apr. 30 , 2017 Abstract Based on the conventional meteorological observation data and the 1˚ × 1˚ NCEP reanalysis data and satellite cloud images with a time interval of 6 hours, the reason for the eastward migration of typhoon trail of “Haiyan” No. 1330 was analyzed. And the impact of typhoon in southern China which led to strong precipitation was also analyzed. The results show that the typhoon path is closely related to the intensity and position evolution of the western Pacific subtropical high. When the subtropical high is strengthened, the typhoon is located on the south side of the sub- tropical high, guided by the east wind flow westward. From 10 onwards, the typhoon is located in the south of Hainan Province, the typhoon is affected by cold air, subtropical high weakened east- ward, and the typhoon gradually adjusts to the west side of the subtropical high. At 20 o’clock on the 10th, the typhoon was led by the south wind and turned northbound. Before typhoon landing, by the typhoon inverted trough, China’s southern region has abundant water vapor and a strong upward movement; precipitation and 850 hPa vorticity field, divergence field has a good corres- pondence. During the heavy rainfall, there is obvious water vapor conveyor belt, water vapor converge