Improvement of wind field hindcasts for tropical cyclones
Improvement of wind field hindcasts for tropical cyclones
复制标题
DOI：
10.1016/j.wse.2016.02.002
复制
发表时间：
2016
影响因子：
4
通讯作者：
Yi Pan;Yongping Chen;Jiang‐Long Li;Xuelin Ding
中科院分区：
文献类型：
--
作者：
Yi Pan;Yongping Chen;Jiang‐Long Li;Xuelin Ding
本文对两个典型的热带气旋，Fanapi和Meranti，发生在2010年。本文首先分析了现有三种模式在气旋风场后报中的性能，然后提出了两种改进方法。第一种方法是叠加法，将参数化气旋模式计算的风场叠加到交叉校准多平台再分析资料（CCMP）的风场上。用于叠加的半径基于对两个风场之间的最小差异的分析。另一种是直接修正法，即根据实测最大风速与再分析值的比值以及距气旋中心的距离，直接对CCMP再分析资料进行修正。利用这两种方法，可以克服再分析资料中强风低估的问题。与气旋风场模式和再分析资料相比，这两种方法在后报热带气旋风场方面都有很大的改进。
This paper presents a study on the improvement of wind field hindcasts for two typical tropical cyclones, i.e., Fanapi and Meranti, which occurred in 2010. The performance of the three existing models for the hindcasting of cyclone wind fields is first examined, and then two modification methods are proposed to improve the hindcasted results. The first one is the superposition method, which superposes the wind field calculated from the parametric cyclone model on that obtained from the cross-calibrated multi-platform (CCMP) reanalysis data. The radius used for the superposition is based on an analysis of the minimum difference between the two wind fields. The other one is the direct modification method, which directly modifies the CCMP reanalysis data according to the ratio of the measured maximum wind speed to the reanalyzed value as well as the distance from the cyclone center. Using these two methods, the problem of underestimation of strong winds in reanalysis data can be overcome. Both methods show considerable improvements in the hindcasting of tropical cyclone wind fields, compared with the cyclone wind model and the reanalysis data.