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中文摘要: 利用Lorenz模式作变分同化数值试验，通过对一个简单系统的讨论，介绍四维变分同化方法。对初值敏感性和观测点的个数及观测值作了对比试验，发现随着模式对初值敏感性的增加，同化效果会越来越差；观测点越少，观测值误差越大，这些都会影响同化效果，甚至导致同化失败。
中文关键词: 伴随模式，变分同化，Lorenz系统
Abstract:The adjoint technique is used in the variational data assimilation using the famous Lorenz model. The numerical experiment shows that the four dimensional assimilation has some relation with the model's predictability, with the increase of error of initial guess field, the effect of the assimilation model become even worse, until the assimilation process fails completely. In the time window of assimilation, if the points of observation are enough, the errors of the observation will not affect the effect of assimilation very much, this will be beneficial for the satellite and radar data assimilation used in operational weather prediction model.
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基金项目:
| 作者 | 单位 |
| 杜川利 | 中国科学院地球环境研究所，中国科学院研究生院北京 100039；陕西气象局 |
| 黄向宇 | DanishMeteorologicalInstituteCopenhagen，Denmark |
| 俞小鼎 | 中国气象局培训中心 |
| Author Name | Affiliation |
引用文本：
杜川利,黄向宇,俞小鼎,2005.变分同化方法在Lorenz系统中的简单应用研究[J].气象,31(2):23-26.
,2005.Simple Application of Variational Four-dimensional Assimilation in Lorenz System[J].Meteor Mon,31(2):23-26.
杜川利,黄向宇,俞小鼎,2005.变分同化方法在Lorenz系统中的简单应用研究[J].气象,31(2):23-26.
,2005.Simple Application of Variational Four-dimensional Assimilation in Lorenz System[J].Meteor Mon,31(2):23-26.