摘要
选择1979～1993年间的热带气旋为试验个例,通过扰动热带气旋初始位置和初始结构,构造集合成员, 用正压原始方程模式,进行路径集合预报试验, 并初步探讨预报成员的集合方法。试验结果表明:热带气旋定位误差影响路径预报,但扰动初始位置的集合平均预报与控制试验的预报水平相接近。扰动热带气旋初始结构的集合预报试验表明,约有60 %～70 %个例的集合路径预报得到改进。此外,试验结果还表明,当环境引导气流较弱时,进行扰动热带气旋初始结构的集合预报,预报结果的改善较明显。
Ensemble forecasting of tropical cyclone(TC) motion was studied using a primitive equation barotropic model by perturbing initial position and structure for 1979～1993 TC. The results show that TC initial position perturbation make its track different, but ensemble mean is close to control forecast. Experiments was also performed by perturbing TC initial parameters which were used to generate TC initial filed, and more improvement can be obtained bY taking ensemble mean of selective member than selecting member randomly. 60 %～70 % of all cases?skill is improved in selective ensemble mean. When the environmental steering is weak, more improvement can be obtained over the control forecast.
出处
《热带气象学报》
CSCD
北大核心
2003年第1期1-8,共8页
Journal of Tropical Meteorology
基金
国家自然科学基金资助 (批准号: 40005003)
