海洋预报2011，Vol.28Issue(1)：39-47,9.
0808号台风"凤凰"登陆过程的三维变分同化试验
3D-Var assimilation experiment on landfall of typhoon Fung-wong (0808)
摘要
Abstract
A numerical experiment is conducted on the landfall of typhoon Fung-wong (0808) mainly in this paper. First, GPS occultation refractivity data and cloud drift winds were used to initialize typhoon in WRF-Var system. The result of numerical simulation of Fung-wong shows that the initial structure and forecast of typhoon differ with the different assimilated data. GPS occultation refractivity data and cloud drift winds assimilation, the adjustment of which to the typhoon initial field is the biggest, can help provide the evolution of the track and precipitation distributions reasonably. Second, the characteristics of the elements adjusted in the data assimilation was studied. It is found that the adjustment of the initial field is a multi-peak structure in the vertical direction, and the significance of the adjustment is related with the data and the element. Generally, low-level adjustment is larger than the top. Finally, a preliminary study has been also made on the mechanism of the sustaining of Fung-wong.During the forecast time, the sources of water vapor changes gradually from the south-west Pacific to the South China Sea when Typhoon nears the mainland, but there keeps a water vapor channel all the time, through which abundant water vapor was continuously transported to typhoon Fung-wong, and sustained vigorous ascending motion, which transported the warm and moist air in the lower troposphere upwards to release latent heat and thus to provide kinetic energy for Fung-wong's sustaining.关键词
GPS掩星资料/云导风/三维变分同化/台风模拟/物理量Key words
GPS occultation refractivity data/ cloud drift winds/ three-dimensional assimilation/ typhoon simulation/ variables分类
天文与地球科学引用本文复制引用
赖珍权,沈桐立,丁治英..0808号台风"凤凰"登陆过程的三维变分同化试验[J].海洋预报,2011,28(1):39-47,9.基金项目
国家自然科学基金(40975037 （）
40775033) （）
