Study on Seasonal and Interannual Variations of Surface Circulation in the Sea of Okhotsk using Satellite Observations

利用卫星观测研究鄂霍次克海表层环流的季节和年际变化

基本信息

  • 批准号:
    15340152
  • 负责人:
  • 金额:
    $ 10.18万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2003
  • 资助国家:
    日本
  • 起止时间:
    2003 至 2005
  • 项目状态:
    已结题

项目摘要

Seasonal and interannual variations in the surface circulation of the Sea of Okhotsk including the East Sakhalin Current (ESC) are investigated using ten-year records of the sea level anomaly (SLA) observed by the TOPEX/POSEIDON (T/P) altimeter. The T/P SLA clearly documents seasonal and interannual variations in the ESC along the east coast of Sakhalin Island, although sea ice masks the region from January to April. Estimates of surface current velocity anomaly derived from T/P SLA are in good agreement with drifting buoy observations. The ESC is strong in winter, with a typical current velocity of 30-40 cm/s in December, and almost disappears in summer. Southward flow of the ESC is confined to the shelf and slope region and consists of two velocity cores. These features of the ESC are consistent with short-term observations reported in previous studies. Analysis of the ten-year records of T/P SLA confirms that the structure of the ESC is maintained each winter and the seasonal cycle is repeated every year, although the strength of the ESC shows large interannual variations. Seasonal and interannual variations in the ESC are discussed in relation to wind-driven circulation in the Sea of Okhotsk, using wind stress and wind stress curl fields derived from European Centre for Medium Range Weather Forecasts (ECMWF) reanalysis data and a scatterometer-derived wind product. Seasonal and interannual variations of the anticyclonic eddy in the Kuril Basin are also revealed using T/P SLA. Combining the observations by ground-based High frequency (HF) ocean radar, satellite altimetry, coastal tide gauge stations, and a bottom-mounted acoustic Doppler current meter (ADCP), seasonal and interannual variations of the Soya Warm Current is also revealed.
利用TOPEX/POSEIDON(T/P)高度计观测的海平面异常(SLA)资料,研究了包括东萨哈林海流(ESC)在内的鄂霍次克海表层环流的季节和年际变化。T/P SLA清楚地记录了萨哈林岛东海岸沿着ESC的季节性和年际变化,尽管1月至4月海冰掩盖了该地区。由T/P SLA得到的表层流速异常估计值与漂流浮标观测值吻合较好。冬季ESC较强,12月典型流速为30-40 cm/s,夏季基本消失。向南的ESC流被限制在陆架和斜坡区,并由两个速度核心。ESC的这些特征与先前研究中报告的短期观察结果一致。对10年T/P SLA记录的分析证实,尽管ESC强度存在较大的年际变化,但ESC的结构在每年冬季保持不变,季节循环每年重复。季节性和年际变化的ESC讨论风驱动的环流在鄂霍次克海,使用风应力和风应力旋度场来自欧洲中期天气预报中心(ECMWF)再分析数据和散射计衍生的风产品。利用T/P SLA还揭示了千岛盆地反气旋涡旋的季节和年际变化。结合地基高频海洋雷达、卫星测高、海岸验潮站和海底声学多普勒流速仪(ADCP)的观测,揭示了大豆暖流的季节和年际变化。

项目成果

期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Seasonal variation of the Soya Warm Current observed by HF ocean radars
高频海洋雷达观测到的大豆暖流的季节变化
Observation of the Soya Warm Current using HF Ocean Radar
利用高频海洋雷达观测大豆暖流
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Ebuchi;N.;Y.Fukamachi;K.I. Ohshima;K.Shirasawa;M.Ishikawa;T.Takatsuka;T.Daibo;and M.Wakatsuchi
  • 通讯作者:
    and M.Wakatsuchi
Seasonal and interannual variations in the East Sakhalin Current revealed by the TOPEX/POSEIDON altimeter data
TOPEX/POSEIDON 高度计数据揭示的东萨哈林洋流的季节和年际变化
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EBUCHI Naoto其他文献

EBUCHI Naoto的其他文献

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{{ truncateString('EBUCHI Naoto', 18)}}的其他基金

Evaluation of sea surface salinity observed by spaceborne microwave radiometer and applications to studies of the global water cycle
星载微波辐射计观测的海面盐度评价及其在全球水循环研究中的应用
  • 批准号:
    23310001
  • 财政年份:
    2011
  • 资助金额:
    $ 10.18万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Modeling of the Intermediate Circulation and Material Transferin the Pan-Okhotsk Region
泛鄂霍次克地区中间循环和物质转移模拟
  • 批准号:
    18201002
  • 财政年份:
    2006
  • 资助金额:
    $ 10.18万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Probability distribution of surface wave slope derived from spaceborne remote sensing data
星载遥感数据面波斜率概率分布
  • 批准号:
    11640424
  • 财政年份:
    1999
  • 资助金额:
    $ 10.18万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
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