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首页> 外文期刊>GIScience & remote sensing >Performance evaluation of normalized difference chlorophyll index in northern Gulf of Mexico estuaries using the Hyperspectral Imager for the Coastal Ocean
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Performance evaluation of normalized difference chlorophyll index in northern Gulf of Mexico estuaries using the Hyperspectral Imager for the Coastal Ocean

机译：利用高光谱成像仪对墨西哥湾北部河口归一化差异叶绿素指数的性能评估

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摘要

The Hyperspectral Imager for the Coastal Ocean (HICO) was used to derive chlorophyll-a (chl-a) based on the normalized difference chlorophyll index (NDCI) in two Gulf of Mexico coastal estuaries. Chl-a data were acquired from discrete in situ water sample analysis and above-water hyperspectral surface acquisition system (HyperSAS) remote sensing reflectance in Pensacola Bay (PB) and Choctawhatchee Bay (CB). NDCI algorithm calibrations and validations were completed on HICO data. Linear and best-fit (polynomial) calibrations performed strongly with R~2 of 0.90 and 0.96, respectively. The best validation of NDCI resulted with an R~2 of 0.74 and root-mean-square error (RMSE) of 1.64 μg/L. A strong spatial correspondence was observed between NDCI and chl-a, with higher NDCI associated with higher chl-a and these areas were primarily located in the northern PB and eastern CB at the river mouths. NDCI could be effectively used as a qualitative chl-a monitoring tool with a reduced need for site-specific calibration.
机译：基于两个墨西哥湾沿海河口的归一化差异叶绿素指数（NDCI），使用了沿海高光谱成像仪（HICO）得出叶绿素-a（chl-a）。 Chl-a数据来自离散的原位水样分析和彭萨科拉湾（PB）和Choctawhatchee湾（CB）的水上高光谱表面采集系统（HyperSAS）遥感反射率。 NDCI算法的校准和验证已在HICO数据上完成。线性和最佳拟合（多项式）校准的R〜2分别为0.90和0.96，表现出色。 NDCI的最佳验证结果是R〜2为0.74，均方根误差（RMSE）为1.64μg/ L。在NDCI和chl-a之间观察到强烈的空间对应关系，较高的NDCI与较高的chl-a相关，这些区域主要位于河口北部PB和东部CB。 NDCI可以有效地用作定性chl-a监测工具，而无需进行针对特定地点的校准。

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  • 来源
    《GIScience & remote sensing》 |2014年第2期|175-198|共24页
  • 作者

    Deepak R. Mishra; Blake A. Schaeffer; Darryl Keith;

  • 作者单位

    Department of Geography, University of Georgia, Athens, GA 30602, USA;

    National Exposure Research Laboratory, Office of Research and Development, US Environmental Protection Agency, Durham, NC 27711, USA;

    National Health and Environmental Effects Research Laboratory, Office of Research and Development, US Environmental Protection Agency, Narragansett, RI 02882, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    HICO; NDCI; HyperSAS; chlorophyll-a; remote sensing reflectance;

    机译：HICO;NDCI;HyperSAS;叶绿素a遥感反射率;

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