| 一种改进的Cressman插值方法在渤海表层总氮数据处理中的应用 |
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| 引用本文： | 申友利,叶祖超,张少峰,张春华.一种改进的Cressman插值方法在渤海表层总氮数据处理中的应用[J].海洋环境科学,2017,36(4):622-628. |
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| 作者姓名： | 申友利 叶祖超 张少峰 张春华 |
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| 作者单位： | 1.国家海洋局北海海洋环境监测中心站, 广西 北海 536000 |
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| 基金项目： | 国家海洋局南海分局海洋科学技术局长基金（1648）；国家海洋公益性行业科研专项经费项目（201305023-5） |
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| 摘 要： | 根据渤海常规监测站的站位分布特征，提出了一种用来处理渤海表层总氮数据的改进的Cressman插值（MCI）方法。由渤海常规监测总氮数据反应的污染状况设定污染物浓度的两种理想分布，通过理想实验发现利用MCI方法插值得到的误差比传统的Cressman方法、Kriging方法和Local Polynomial（LP）方法更小，验证了MCI方法的有效性。实际实验利用交叉验证方法来计算插值的误差，并用MCI方法插值出2009年和2010年共4个月份的表层总氮空间分布，为渤海污染状况分析提供较为准确的数据支持。
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| 关 键 词： | 插值半径 交叉验证 渤海 总氮 |
| 收稿时间： | 2016-08-12 |
A modified cressman interpolation method applied to process total nitrogen data in Bohai surface waters |
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| You-li SHEN,Zu-chao YE,Shao-feng ZHANG,Chun-hua ZHANG.A modified cressman interpolation method applied to process total nitrogen data in Bohai surface waters[J].Marine Environmental Science,2017,36(4):622-628. |
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| Authors: | You-li SHEN Zu-chao YE Shao-feng ZHANG Chun-hua ZHANG |
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| Institution: | 1.Beihai Marine Environmental Monitoring Center, State Oceanic Administration of China, Beihai 536000, China |
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| Abstract: | A modified Cressman interpolation (MCI) method was proposed to study the total nitrogen (TN) data in Bohai surface waters, based on the distribution of Bohai routine monitoring stations.The pollution concentration station data features two idealized distributions.The twin experiments suggest reduced interpolation biases using MCI method, compared to the traditional Cressman, Kriging and Local Polynomial (LP) method.In practical experiments, cross validation scheme was applied to evaluate the interpolation biases.Bohai Surface TN concentration was recalculated following MCI method for four quarters in 2009 and 2010, providing an improved dataset for Bohai pollution investigation. |
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