Basic Research on Development of Ocan Prediction Models for Asian Marginal Seas
亚洲边缘海Ocan预报模型发展的基础研究
基本信息
- 批准号:11205205
- 负责人:
- 金额:$ 8.77万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research on Priority Areas
- 财政年份:1999
- 资助国家:日本
- 起止时间:1999 至 2002
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The present basic research for developing ocean forecasting models has been conducted jointly by oceanographers of Tokyo Univ., Kyoto Univ., Kyushu Univ., Mie Univ., and Ehime Univ. with a particular Emphasis on the NEAR GOOS region. The major achievements are described in the following.We have developed an ultra high-resolution nested ocean model (with horizontal resolution of 1/18 degree) and have successfully simulated the vertical structure and the path of the Kuroshio. The model also resolves the ocean tide. Analyzing the model results, we have clarified the important role of JEBAR (joint effect of baroclinicity and bottom relief) in steering the Kuroshio eastward in the region southwest of the Kyushu Island ; the role of the bottom torque is to drive the Kuroshio into the deeper region. Tracer experiments show that about 50% (20%) of the water mass of the Tsushima Current is from the Taiwan Strait and another 50% (70%) is from the Kuroshio in summer (winter).The outflow of the Okhotsk Sea water of low potential vorticity is one of origins of the North Pacific Intermediate Water. Using a high-resolution non-hydrostatic ocean model, we have shown that eddy shedding due to the baroclinic instability of the front formed by tidal mixing plays a crucial role in this process. The water left from the Okhotsk Sea penetrates even into the Shikoku Basin.The RIAMMOM ocean model is successfully used for hindcasting experiments of currents in the Japan Sea. The data assimilation method used in the experimens is based on the Kalman filter. We have demonstrated that the ocean forecasting limit is about two months. We have also shown that to resolve downwelling associated with baroclinic instability as well as convection along the ocean front is a necessary ingredient to simulate realistical ly subsurface and intermediate conditions in the Japan Sea.
目前开发海洋预报模式的基础研究是由东京大学的海洋学家联合进行的,京都大学,九州大学,三重大学,与爱媛大学合作,特别强调NEAR GOOS区域。主要成果如下:建立了一个水平分辨率为1/18度的超高分辨率嵌套海洋模式,成功地模拟了黑潮的垂直结构和路径。该模型还解决了海洋潮汐。通过对模式结果的分析,阐明了斜压性和底起伏的联合作用(JEBAR)在九州岛西南海域黑潮东移中的重要作用,底扭矩的作用是将黑潮向更深区域推进。示踪实验表明,夏(冬)季对马海流中约50%(20%)的水团来自台湾海峡,50%(70%)来自黑潮,鄂霍次克海低位涡的外流是北太平洋中层水的来源之一。使用高分辨率的非静力海洋模式,我们已经表明,涡脱落由于斜压不稳定的潮汐混合形成的前面在这个过程中起着至关重要的作用。鄂霍次克海的海水甚至渗透到四国海盆。RIAMINO海洋模式成功地用于日本海海流的后报实验。试验中采用的资料同化方法是基于卡尔曼滤波的。我们已经证明,海洋预测的极限是大约两个月。我们还表明,解决下降流与斜压不稳定以及对流沿着海洋锋是一个必要的成分,以模拟真实的次表层和中间条件在日本海。
项目成果
期刊论文数量(166)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Komori, N., T.Awaji, Y.Ishikawa, T.Kuragano: "Short-range forecast of the Kuroshio variabilities south of Japan using TOPEX/Poseidon altimetric data"J.Geophys.Res.. 108. 10.1029/2001JC001282 (2003)
Komori, N., T.Awaji, Y.Ishikawa, T.Kuragano:“使用 TOPEX/Poseidon 测高数据对日本南部黑潮变化的短期预测”J.Geophys.Res.. 108. 10.1029/2001JC001282 (2003
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Sekine, Y., K.Uchiyama: "Outflow of the Intermediate Oyashio Waterfrom Sagami Bay to Shikoku Basin."J. Oceanogr.. 58. 531-537 (2002)
Sekine, Y., K.Uchiyama:“中级亲潮水从相模湾流向四国盆地。”J.
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Komori, N., T.Awaji, Y.Ishikawa, T.Kuragano: "Short-range forecast of the Kuroshio variabilities south of Japan using TOPEX/Poseidon altimetric data"J.Geophys.Res.. (in press).
Komori, N.、T.Awaji、Y.Ishikawa、T.Kuragano:“使用 TOPEX/Poseidon 测高数据对日本南部黑潮变化进行短期预测”J.Geophys.Res..(出版中)。
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T.Awaji, 他2名: "Formation process of intermediate water in baroclinic current under cooling."J.Geophys.Res.. (in press).
T.Awaji 和另外 2 人:“冷却下斜斜流中中间水的形成过程”。J.Geophys.Res..(出版中)。
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T.Yamagata 他2名: "The Intrusion of the North Pacific waters into the South China Sea"J.Geophys.Res.. 105. 6415-6424 (2000)
T.Yamagata 等 2 人:“北太平洋水域侵入南海”J.Geophys.Res.. 105. 6415-6424 (2000)
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YAMAGATA Toshio其他文献
YAMAGATA Toshio的其他文献
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{{ truncateString('YAMAGATA Toshio', 18)}}的其他基金
Long-term modulations of tropical climate modes and ocean warming
热带气候模式和海洋变暖的长期调节
- 批准号:
20340125 - 财政年份:2008
- 资助金额:
$ 8.77万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Decadal Variation of the Indian Ocean Dipole
印度洋偶极子的年代际变化
- 批准号:
17204040 - 财政年份:2005
- 资助金额:
$ 8.77万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Investigation of the Kuroshio variability south of Japan with special emphasis on scale interaction
日本南部黑潮变化的调查,特别强调尺度相互作用
- 批准号:
14340137 - 财政年份:2002
- 资助金额:
$ 8.77万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Variability of Western Boundary Currents
西部边界流的变化
- 批准号:
07044068 - 财政年份:1995
- 资助金额:
$ 8.77万 - 项目类别:
Grant-in-Aid for international Scientific Research
Seasonal and interannual variations in the Indian Osean
印度海洋的季节和年际变化
- 批准号:
06452085 - 财政年份:1994
- 资助金额:
$ 8.77万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Ocean Dynamics and Climate in the Western Pacific
西太平洋的海洋动力学和气候
- 批准号:
05044034 - 财政年份:1993
- 资助金额:
$ 8.77万 - 项目类别:
Grant-in-Aid for international Scientific Research
Studies on Annual and Interannual Variations of Oceanic Thermal Domes
海洋热穹年及年际变化研究
- 批准号:
03402015 - 财政年份:1991
- 资助金额:
$ 8.77万 - 项目类别:
Grant-in-Aid for General Scientific Research (A)
Studies on Global-Scale Air-Sea Interactions
全球尺度海气相互作用研究
- 批准号:
01044110 - 财政年份:1989
- 资助金额:
$ 8.77万 - 项目类别:
Grant-in-Aid for international Scientific Research
Seasonal and Interannual Variabilities of the Pacific Ocean Circulation and Their Relevance to ENSO
太平洋环流的季节和年际变化及其与 ENSO 的相关性
- 批准号:
63460046 - 财政年份:1988
- 资助金额:
$ 8.77万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
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在比现在温暖的气候阶段,对马海流对日本海古海洋和生态系统的影响
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- 批准号:
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Grant-in-Aid for international Scientific Research
An Eco-geographical Study of the Basin of the Tsushima Current - Comprehensive Regional Investigations of the Ao-shio Cultures -.
对马海流盆地的生态地理研究 - 青盐文化的综合区域调查 -。
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