福建海洋浮标观测数据接续技术初步研究
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作者单位:

1.福建省气象信息中心;2.福建省气象台

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P413.2?

基金项目:

上海台风研究基金项目(TFJJ202113)


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Preliminary study on data continuation technology for Fujian ocean buoy observations
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Affiliation:

1.Fujian Meteorological Information Center;2.Fujian Meteorological Observatory

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    摘要:

    应用百分位、K-均值聚类等技术,分析福建海洋浮标的经纬度信息,解决长序列海洋浮标资料存在位置漂移、摆动情况时的缺测/缺失观测时次的位置估算问题。在此基础上,结合CLDAS、ERA5等第三方资料,分别采用反距离权重法、球面克里金插值等算法在给定时次和经纬度位置时进行计算,得到相应的气温、气压、湿度、风向风速等要素估测值。对不同第三方信息和不同插值算法估测结果进行综合评估,得出数据序列稳定性和时序长度对要素填补接续有很大影响;反距离权重法相比球面克里金插值评估效果表现更好等结论。接着针对7个福建海洋浮标原始观测数据,根据结论重新整合得到新数据集,两者对比评估检验,各气象要素的皮尔逊相关系数普遍在0.9以上,新数据集不仅完整性得到极大改善,而且保留了原始观测数据的一致性和稳健性,局部异常要素值也得到了有效控制。最后在2014—2021年台风个例检验过程中,对比台风实时路径进行风速要素的评估,新数据集风速要素相关系数平均提高0.03、均方误差平均下降为0.5,实验表明海洋浮标原始观测数据接续后具有很好的业务适用性。

    Abstract:

    The percentile and K-mean clustering were applied to analyze the longitude and longitude information of Fujian ocean buoy, and solve the problem of position estimation of missing measurement and missing observation in the long sequence of ocean buoy data。On this basis, combined with the third-party data such as CLDAS and ERA 5, the inverse distance weight method and spherical Kerry gold interpolation algorithms are used to calculate the timing and longitude and latitude positions, and the corresponding temperature, pressure, humidity, wind direction and wind speed are estimated. On the evaluation results of different third-party information and different interpolation algorithms, the stability of data sequence and timing length on the filling of elements are better than spherical interpolation. Subsequently, based on the conclusions, a new data set was reconstituted by integrating the original observation data from seven Fujian marine buoys. A comparative evaluation and validation of the two data sets showed that the Pearson correlation coefficients for various meteorological elements were generally above 0.9. The new data set not only significantly improved its completeness but also preserved the consistency and robustness of the original observation data. Local abnormal element values were also effectively controlled. During the validation process of typhoon cases from 2014 to 2021, the wind speed elements were evaluated by comparing them with the real-time typhoon tracks. The correlation coefficients of the wind speed elements in the new data set is increased by 0.03, and the mean square error decreased to 0.5. The experiment shows that the original observation data of ocean buoys have good operational applicability after being continued.

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  • 收稿日期:2024-05-13
  • 最后修改日期:2024-07-15
  • 录用日期:2024-08-23
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