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台湾海峡有效波高的SWAN模式与ERA-Interim数据对比分析

王奎 岳显昌 吴雄斌 周恒 滕陈轲敏

王奎,岳显昌,吴雄斌,等. 台湾海峡有效波高的SWAN模式与ERA-Interim数据对比分析[J]. 海洋学报,2021,x(x):1–11
引用本文: 王奎,岳显昌,吴雄斌,等. 台湾海峡有效波高的SWAN模式与ERA-Interim数据对比分析[J]. 海洋学报,2021,x(x):1–11
Wang Kui,Yue Xianchang,Wu Xiongbin, et al. Comparative analysis of SWAN model and ERA-Interim data on significant wave height in the Taiwan Strait[J]. Haiyang Xuebao,2021, x(x):1–11
Citation: Wang Kui,Yue Xianchang,Wu Xiongbin, et al. Comparative analysis of SWAN model and ERA-Interim data on significant wave height in the Taiwan Strait[J]. Haiyang Xuebao,2021, x(x):1–11

台湾海峡有效波高的SWAN模式与ERA-Interim数据对比分析

基金项目: 广东省重点领域研发计划(编号:2020B1111020005);科技部重点研发计划(编号:2016YFC1401100);自然科学基金面上项目(编号:61771352)
详细信息
    作者简介:

    王奎(1996-),男,河南省驻马店市人,研究方向:海洋动力学及数值模拟。E-mail:wang_kui@whu.edu.cn

    通讯作者:

    岳显昌,副教授,研究方向:中高层大气动力学及无线电海洋遥感。E-mail:yuexc@whu.edu.cn

  • 中图分类号: P731.22

Comparative analysis of SWAN model and ERA-Interim data on significant wave height in the Taiwan Strait

  • 摘要: 有效波高是描述海浪的关键参数。欧洲中期天气预报中心(ECMWF)提供的ERA-Interim再分析数据提供了全球海浪的有效波高,本文选取该数据在台湾海峡2013年3月份的有效波高结果,分别与浮标观测数据以及海浪数值模式SWAN (Simulating Waves Nearshore)的数值模拟结果相对比,来分析其预报效果。结果显示:在浮标点,ERA-Interim数据和SWAN模拟浪高数据与浮标浪高数据的时间相关系数分别为0.94和0.98,ERA-Interim数据的浪高均值约为浮标的51%,为SWAN模拟数据的70%。在台湾海峡区域,ERA-Interim数据与SWAN模拟浪高之间的空间异常相关系数(ACC)月均值为0.51,时序ACC曲线显示,一般在海峡东北口风初起时刻ACC值最小,在风吹遍海峡并增长的过程中,ACC迅速增加,在风速达到最大值之后,ACC开始下降,但ERA-Interim数据与SWAN数值模拟结果在整个海峡区域的浪高最大值与最小值分布位置基本一致。综合分析,ERA-Interim数据能够反映台湾海峡区域此时间段的有效波高的时空变化趋势,在数值上有明显低估。
  • 图  1  计算区域网格及台湾海峡研究区域局部放大

    Fig.  1  The computational region grid and the partial enlarged detail of Taiwan Strait

    图  2  台湾海峡研究区域水深地形

    Fig.  2  Topography and depth of water in the Taiwan Strait study area

    图  3  浮标点处有效波高的SWAN模式模拟结果(蓝线)与浮标观测结果(点线)对比

    Fig.  3  Comparison of SWAN model simulation results (blue line) and buoy observation results (dotted line) of the significant wave height at the buoy point

    图  4  图3相同,对应的是ERA-Interim数据(蓝线)和浮标数据(黑线)对比

    Fig.  4  Same as Figure 3, the comparison of ERA-Interim reanalysis data (blue line) and buoy data (black line)

    图  5  所选择的4个时刻台湾海峡区域SWAN模式数值模拟与ERA-Interim数据有效波高空间变化分布

    Fig.  5  The spatial variation distribution of significant wave height by the SWAN numerical simulation and the ERA-Interim data at the selected 4 moments in the Taiwan Strait

    图  6  模拟期间ERA-Interim浪高与SWAN模拟浪高之间ACC的时序值

    Fig.  6  The ACC between ERA-Interim wave height and SWAN simulated wave height during simulation

    表  1  不同风场条件下SWAN数值模拟结果与浮标测量值比较

    Tab.  1  Comparison of SWAN numerical simulation results and buoy measurements under different wind field conditions

    风场类型风速U
    范围/m·s−1
    相关系数二者差值 /m
    最大值均值RMS
    弱风0≤U≤50.900.600.150.18
    中风5<U≤120.931.290.340.46
    强风U>120.901.200.280.42
    下载: 导出CSV

    表  2  浮标点与周围4个ERA-Interim数据点有效波高对比

    Tab.  2  Comparison of the significant wave height between the buoy point and the surrounding 4 ERA-Interim data points

    数据点信息有效波高差值/m
    坐标(E, N)水深/m最大值均值RMS
    (118.125°, 23.750°)32.422.130.720.95
    (118.125°, 23.625°)35.412.100.680.90
    (118.250°, 23.625°)42.902.010.630.83
    (118.250°, 23.750°)39.542.040.670.88
    下载: 导出CSV

    表  3  浮标点三种方式得到的有效波高月均值、最大值以及与CCMP风速相关系数的对比

    Tab.  3  Comparison of the significant wave height monthly averaged values, maximum values and correlation coefficients with the CCMP wind speed obtained by three methods

    浮标SWAN模式ERA-Interim
    均值/m1.551.300.88
    最大值/m4.873.982.63
    CORCCMP0.920.940.91
    下载: 导出CSV

    表  4  不同风场条件下浮标数据与ERA-Interim数据有效波高值比较

    Tab.  4  Comparison of significant wave height between buoy data and ERA-Interim data under different wind conditions

    风场类型风速U
    范围/(m·s−1
    相关系数二者差/m
    最大值均值RMS
    弱风0≤U≤50.560.810.190.27
    中风5<U≤120.851.830.991.06
    强风U>120.882.001.251.35
    下载: 导出CSV
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