| 正压原始方程变分初值试验 |
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| 引用本文： | 王晓林,吴辉碇,王宝根.正压原始方程变分初值试验[J].气象学报,1980,38(4):300-308. |
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| 作者姓名： | 王晓林 吴辉碇 王宝根 |
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| 作者单位： | 北京大学地球物理系
(王晓林，吴辉碇)，国家海洋局海洋预报总台(王宝根) |
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| 摘 要： | 本文利用地转风关系及运动方程作为动力约束条件,对初始风场及高度场进行了调整。在调整场与实测场均方差最小,总平均动能损失也最小的条件下选择了权重因子。还成功地进行了局部风场“嵌入”即所谓“窗户”区试验。对于变分约束对扰动的影响作了初步的探讨。最后还做了24小时预报并与地转初值预报进行了比较。
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| 收稿时间： | 1979/7/23 0:00:00 |
| 修稿时间： | 1979/11/22 0:00:00 |
A TEST OF VARIATIONAL INITIALIZATION FOR A BAROTROPIC PRIMITIVE EQUATION MODEL |
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| Wang Xiao-lin,Wu Hui-ding and Wang Bao-gen.A TEST OF VARIATIONAL INITIALIZATION FOR A BAROTROPIC PRIMITIVE EQUATION MODEL[J].Acta Meteorologica Sinica,1980,38(4):300-308. |
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| Authors: | Wang Xiao-lin Wu Hui-ding and Wang Bao-gen |
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| Institution: | Department of Geophysics, Beijing University;Department of Geophysics, Beijing University;Central Station of Marine Hydrotneteorological Forecast, National Marine Service |
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| Abstract: | In this paper,we utilize the variational method in the initialization for a barotropic primitive equation model.As a dynamic constraints,the differences between the observed and analyzed fields are at it's minimum subject to the quasigeostrophic relations or the requirement of quasi-steadiness for the primitive equations,and it is required to make the loss of total mean kinetic energy over the analysis area to be minimum.24-hours 500 mb height forecasts are made and compared with those obtained in taking the geostrophic winds as initial fields.In next experiment some observed data are partly used in the initial field.The forecasting results are improved.The influence of the variational constraint on perturbations are also discussed. |
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