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首页> 外文期刊>International journal of remote sensing >Validation of chlorophyll-α concentration maps from Aqua MODIS over the Gulf of Gabes (Tunisia): comparison between MedOC3 and OC3M bio-optical algorithms
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Validation of chlorophyll-α concentration maps from Aqua MODIS over the Gulf of Gabes (Tunisia): comparison between MedOC3 and OC3M bio-optical algorithms

机译:验证加贝斯湾(突尼斯)Aqua MODIS的叶绿素-α浓度图:MedOC3和OC3M生物光学算法之间的比较

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摘要

Few studies have focused on the use of ocean colour remote sensors in the Gulf of Gabes (southeastern Tunisia). This work is the first study to evaluate the ocean colour chlorophyll-a product in this area. Chlorophyll-α concentrations were measured during oceanographic cruises performed off the Gulf of Gabes. These measurements were used to validate satellite data acquired from the Moderate Resolution Imaging Spectroradiometer (MODIS) on the Aqua satellite. First, two atmospheric correction procedures (standard and shortwave infrared) were tested to derive the remote-sensing reflectance, and then a comparison between two bio-optical (OC3M and MedOC3) algorithms were realized using the in situ measurements. Both atmospheric correction procedures gave similar results when applied to our study area indicating that most pixels were non-turbid. The comparison between bio-optical algorithms shows that using the regional bio-optical algorithm MedOC3 improves chlorophyll-a estimation in the Gulf of Gabes for the low values of this parameter.
机译:很少有研究集中在加布斯湾(突尼斯南部)使用海洋颜色遥感器。这项工作是评估该地区海洋颜色叶绿素a产品的第一项研究。在加贝湾外海进行的海洋航行中测量了叶绿素-α的浓度。这些测量用于验证从Aqua卫星上的中等分辨率成像光谱仪(MODIS)获取的卫星数据。首先,测试了两种大气校正程序(标准和短波红外)以得出遥感反射率,然后使用原位测量实现了两种生物光学算法(OC3M和MedOC3)之间的比较。当应用于我们的研究区域时,两种大气校正程序都给出了相似的结果,表明大多数像素是不浑浊的。生物光学算法之间的比较表明,对于该参数的低值,使用区域生物光学算法MedOC3可以改善加贝斯湾的叶绿素a估计。

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  • 来源
    《International journal of remote sensing》 |2013年第20期|7163-7177|共15页
  • 作者单位

    Laboratoire Ecosystemes et Ressources Aquatiques UR03AGRO1, Institut National Agronomique de Tunisie, 1082 Tunis, Tunisie,Laboratoire du milieu marin, Institut National des Sciences et Technologies de la Mer, Salammbo, Tunisie;

    Laboratoire d'Oceanologie et de Geosciences UMR 8187 ULCO/CNRS, 62930 Wimereux, France;

    Laboratoire du milieu marin, Institut National des Sciences et Technologies de la Mer, Salammbo, Tunisie;

    Laboratoire du milieu marin, Institut National des Sciences et Technologies de la Mer, Salammbo, Tunisie;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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