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Mapping inland water carbon content with Landsat 8 data

机译：使用Landsat 8数据绘制内陆水碳含量图

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摘要

Landsat 8 is the first Earth observation satellite with sufficient radiometric and spatial resolution to allow global mapping of lake CDOM and DOC (coloured dissolved organic matter and dissolved organic carbon, respectively) content. Landsat 8 is a multispectral sensor however, the number of potentially usable band ratios, or more sophisticated indices, is limited. In order to test the suitability of the ratio most commonly used in lake carbon content mapping, the green-red band ratio, we carried out fieldwork in Estonian and Brazilian lakes. Several atmospheric correction methods were also tested in order to use image data where the image-to-image variability due to illumination conditions would be minimal. None of the four atmospheric correction methods tested, produced reflectance spectra that matched well with in situ measured reflectance. Nevertheless, the green-red band ratio calculated from the reflectance data was in correlation with measured CDOM values. In situ data show that there is a strong correlation between CDOM and DOC concentrations in Estonian and Brazilian lakes. Thus, mapping the global CDOM and DOC content from Landsat 8 is plausible but more data from different parts of the world are needed before decisions can be made about the accuracy of such global estimation.
机译：Landsat 8是第一颗具有足够辐射度和空间分辨率的地球观测卫星，可以对CDOM和DOC（分别为彩色溶解有机物和溶解有机碳）含量进行全球测绘。 Landsat 8是一种多光谱传感器，但是，可用频带比或更复杂的指标的数量受到限制。为了测试最适合用于湖泊碳含量图绘制的比率（绿红带比率）的适用性，我们在爱沙尼亚和巴西湖泊中进行了实地调查。为了使用图像数据，还测试了几种大气校正方法，其中由于照明条件而导致的图像间差异最小。所测试的四种大气校正方法均未产生与现场测量的反射率非常匹配的反射率光谱。然而，从反射率数据计算出的绿红带比与测得的CDOM值相关。原位数据表明，爱沙尼亚和巴西湖泊中CDOM和DOC浓度之间存在很强的相关性。因此，从Landsat 8映射全球CDOM和DOC内容是合理的，但是在做出有关全球估算准确性的决策之前，需要来自世界各地的更多数据。

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  • 来源
    《International journal of remote sensing》 |2016年第14期|2950-2961|共12页
  • 作者

    Kutser Tiit; Pascual Gema Casal; Barbosa Claudio; Paavel Birgot; Ferreira Renato; Carvalho Lino; Toming Kaire;

  • 作者单位

    Univ Tartu, Estonian Marine Inst, Maealuse 14, Tallinn, Estonia;

    Univ Tartu, Estonian Marine Inst, Maealuse 14, Tallinn, Estonia;

    Natl Inst Space Res, Sao Jose Dos Campos, Brazil;

    Univ Tartu, Estonian Marine Inst, Maealuse 14, Tallinn, Estonia;

    Natl Inst Space Res, Sao Jose Dos Campos, Brazil;

    Natl Inst Space Res, Sao Jose Dos Campos, Brazil;

    Univ Tartu, Estonian Marine Inst, Maealuse 14, Tallinn, Estonia;

  • 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
  • 中图分类
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