FUNDAMENTAL RESEARCH ON DATA ASSIMILATION FOR NUMERICAL OCEAN MODEL

数值海洋模型数据同化的基础研究

• 批准号: 02640320
• 负责人: KUBOTA Masahisa
• 金额: $ 0.9万
• 依托单位: SCHOOL OF MARINE SCIENCE AND TECHNOLOGY, TOKAI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02640320/
• 关键词: ASSIMILATION; NUMERICAL MODEL; SUCCESSIVE CORRECTION METHOD; INFRARED RADIOMETER; MAXIMUM CROSS-CORRELATION METHOD; NOAA; INVERSE METHOD; MICROWAVE ALTIMETER; 相互相関法; 漂流ブイ; アシミレ-ション; 精値モデル; インバ-ス法; 北太平洋; 海洋大循環; GEOSAT; 順圧モデル; 黒潮

A BAROTROPIC MODEL OF THE NORTH PACIFIC HAS BEEN DEVELOPED. SEA SURFACE WIND DATA WHICH ARE SHIP OBSERVATION DATA, SATELLITE DATA AND MODEL ANALYSIS DATA HAS BEEN ANALYZED. BOTH SATELLITE WIND DATA, GEOSAT/ALT AND DMSP/SSMI, ARE QUITE SIMILAR. ON THE OTHER HAND, SHIP OBSERVATION WINDS ARE STRONGER THAN SATELLITE WINDS, WHILE ANALYSIS WINDS ARE WEAKER THAN SATELLITE WINDS. THE BAROTROPIC MODEL HAS BEEN DRIVED BY THOSE WINDS. IT IS CONCLUDED THAT THE KUROSHIO TRANSPORT IN THE BAROTROPIC MODEL LARGELY VARIES DEPENDING ON WHAT WIND DRIVES THE MODEL. WE EXAMINED TWO METHODS ESTIMATING SURFACE VELOCITY FROM TIKE SERIES OF SST IMAGES. WE SHOWED THAT WE CAN EXACTLY ESTIMATE THE CROSS-ITHOTHERM COMPONENT BY AN INVERSE METHOD. WITH THE ADDITION OF MINIMIZATION OF DIVERGENCE, THE MODEL PRODUCES THE ALONG-ISOTHERM COMPONENT OF THE PERTURBATION VELOCITY. CONSTRUCTION OF THE OPTIMUM WIND DATA SET IS DONE BY APPLYING THE SUCCESSIVE CORRECTION METHOD TO SATELLITE WIND DATA. OBTAINED WIND SPEEDS REMARKABLY AGREE WITH WIND SPEEDS MEASURED BY OCEAN BUOYS.

北太平洋的正压模式已经发展。对海面风资料进行了分析，包括船舶观测资料、卫星观测资料和模式分析资料。geosat / alt和dmsp / ssmi卫星风数据非常相似。另一方面，船舶观测风比卫星风强，而分析风比卫星风弱。正压模式是由这些风驱动的。结果表明，正压模式中的黑潮输运在很大程度上取决于驱动模式的风。我们研究了两种从相似的海温图像中估计地表速度的方法。我们证明了用逆方法可以准确地估计出交叉热分量。加入最小散度后，该模型得到了扰动速度的沿等温分量。采用逐次校正方法对卫星风资料进行逐次校正，构建最优风资料集。所得风速与海洋浮标测得的风速非常吻合。

项目成果

M.KUBOTA: "ABYSSAL CIRCULATION MODEL OF THE PHILIPPINE SEA" DEEP-SEA RES. 39. 1439-1452 (1992)

M.Kubota：“菲律宾海深海环流模型”深海研究中心。

M.Kubota: "The Deep Western North Pacifrc ed.by T.Teramoto" Elsevier,

M.Kubota：“北太平洋西部深处，T​​.Teramoto 编辑”Elsevier，

M.Kubota: "Seasonal Variability of the equatorial Pacific" J.Oceanography. 48. 59-76 (1992)

M.Kubota：“赤道太平洋的季节变化”J.Oceanography。

M.KUBOTA: "SEASONAL VARIABILITY OF THE EQUATORIAL PACIFIC" J. OCEANOGRAPHY. 48. 59-76 (1992)

M.Kubota：“赤道太平洋的季节变化”J.海洋学。

M.Kubota: "Abyssal circulation model of the Philippine Sea" Deep-Sea Res.39. 1439-1452 (1992)

M.Kubota：“菲律宾海的深海环流模型”Deep-Sea Res.39。