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| 用变分法修正边界层资料的数值试验 | |
| 引用本文： | 马刚,邱崇践,王强.用变分法修正边界层资料的数值试验[J].气象学报,2001,59(1):107-114. |
| 作者姓名： | 马刚 邱崇践 王强 |
| 作者单位： | 1. 国家卫星气象中心, 2. 兰州大学大气科学系, 3. 北京气象学院, |
| 基金项目： | 国家自然科学基金项目“黑河实验资料优化处理研究”!4 95752 4 9 |
| 摘 要： | 文中用变分方法修正边界层资料及模误差 ,目标函数相对于控制变量的梯度用扰动法计算 ,对利用小扰动求取梯度的方法进行了理论推导和试验分析。利用模式资料所作的数值试验表明 ,该方法能有效地修正模式自身误差 ,使模式能精确描述边界层物理过程 ,从而使调整后的初始场最好地拟合“观测资料” |
| 关 键 词： | 变分 边界层 数值试验 |
| 收稿时间： | 1998/12/10 0:00:00 |
| 修稿时间： | 1998年12月10 |
A NUMERICAL EXPERIMENT FOR MODIFYING THE OBSERVATION DATA IN BOUNDARY LAYER THE VARIATIONAL METHOD |
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| Ma Gang,Qiu Chongjian and Wang Qiang.A NUMERICAL EXPERIMENT FOR MODIFYING THE OBSERVATION DATA IN BOUNDARY LAYER THE VARIATIONAL METHOD[J].Acta Meteorologica Sinica,2001,59(1):107-114. | |
| Authors: | Ma Gang Qiu Chongjian and Wang Qiang |
| Institution: | National Satellite Meteorological Center, Beijing, 100081;Atmospheric Sciences Departmentof Lanzhou University, Lanzhou, 730000;Beijing Meteorological College, Beijing, 100081 |
| Abstract: | The observational fields in planet boundary layer and the model error are modified here in variational assimilation.The gradients of the cost function with respect to control variables are calculated in the way of perturbation. Then the inference in theory and experiment analysis is produced to the method how to obtain the gradient in he way of perturbation.It is the results of numerical experiment using model data that indicate a better modify to model error in this way .It makes the model describing the physical process more correctly.Then the initial fields to the model after modifying can be fit the "observational data"best. |
| Keywords: | Variational Planet boundary layer Numerical experiment |
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