陆地卫星表面反射率档案对水生科学的有效性:对基于云的分析的影响

IF 5.1 2区 地球科学 Q1 LIMNOLOGY
Daniel Andrade Maciel, Nima Pahlevan, Claudio Clemente Faria Barbosa, Evlyn Márcia Leão de Moraes de Novo, Rejane Souza Paulino, Vitor Souza Martins, Eric Vermote, Christopher J. Crawford
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引用次数: 1

摘要

最初是为陆地科学和应用而开发的,美国地质调查局陆地卫星地表反射率(SR)档案跨越40年的观测,已越来越多地用于大规模水质研究。然而,这些产品尚未经过现场测量反射率的严格验证。这封信通过利用一个相当大的全球数据集(N = 1100)来量化和展示SR产品的质量。我们发现Landsat 8/9在绿色和红色波段的SR大致满足目标精度要求(30%),而在蓝色和沿海气溶胶波段的不确定性在48%到110%之间。我们进一步观察到Landsat 5/7 SR的可见光波段存在> +25%的偏差,当与Landsat 8/9结合进行时间序列分析时,会出现明显的下降趋势。用户在使用该档案进行趋势分析时必须谨慎,并且需要在大气校正方面取得进展,以促进陆地卫星档案在水生科学方面的先进应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Validity of the Landsat surface reflectance archive for aquatic science: Implications for cloud-based analysis

Validity of the Landsat surface reflectance archive for aquatic science: Implications for cloud-based analysis

Originally developed for terrestrial science and applications, the US Geological Survey Landsat surface reflectance (SR) archive spanning ~ 40 yr of observations has been increasingly utilized in large-scale water-quality studies. These products, however, have not been rigorously validated using in situ measured reflectance. This letter quantifies and demonstrates the quality of the SR products by harnessing a sizeable global dataset (N = 1100). We found that the Landsat 8/9 SR in the green and red bands marginally meet the targeted accuracy requirements (30%), whereas the uncertainties in the blue and coastal-aerosol bands ranged from 48% to 110%. We further observed > +25% biases in the visible bands of Landsat 5/7 SR, which can introduce an apparent downward trend when applied in time-series analyses combined with Landsat 8/9. Users must exercise caution when using this archive for trend analyses, and progress in atmospheric correction is required to foster advanced applications of the Landsat archive for aquatic science.

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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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