首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Application and Comparison of the MODIS-Derived Enhanced Vegetation Index to VIIRS Landsat 5 TM and Landsat 8 OLI Platforms: A Case Study in the Arid Colorado River Delta Mexico
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Application and Comparison of the MODIS-Derived Enhanced Vegetation Index to VIIRS Landsat 5 TM and Landsat 8 OLI Platforms: A Case Study in the Arid Colorado River Delta Mexico

机译:MODIS衍生的增强植被指数在VIIRSLandsat 5 TM和Landsat 8 OLI平台上的应用和比较:以墨西哥干旱的科罗拉多河三角洲为例

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摘要

The Enhanced Vegetation Index (EVI) is a key Earth science parameter used to assess vegetation, originally developed and calibrated for the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Terra and Aqua satellites. With the impending decommissioning of the MODIS sensors by the year 2020/2022, alternative platforms will need to be used to estimate EVI. We compared Landsat 5 (2000–2011), 8 (2013–2016) and the Visible Infrared Imaging Radiometer Suite (VIIRS; 2013–2016) to MODIS EVI (2000–2016) over a 420,083-ha area of the arid lower Colorado River Delta in Mexico. Over large areas with mixed land cover or agricultural fields, we found high correspondence between Landsat and MODIS EVI (R2 = 0.93 for the entire area studied and 0.97 for agricultural fields), but the relationship was weak over bare soil (R2 = 0.27) and riparian vegetation (R2 = 0.48). The correlation between MODIS and Landsat EVI was higher over large, homogeneous areas and was generally lower in narrow riparian areas. VIIRS and MODIS EVI were highly similar (R2 = 0.99 for the entire area studied) and did not show the same decrease in performance in smaller, narrower regions as Landsat. Landsat and VIIRS provide EVI estimates of similar quality and characteristics to MODIS, but scale, seasonality and land cover type(s) should be considered before implementing Landsat EVI in a particular area.
机译:增强植被指数(EVI)是用于评估植被的关键地球科学参数,最初是为Terra和Aqua卫星上的中等分辨率成像光谱仪(MODIS)开发和校准的。随着2020/2022年MODIS传感器即将退役,将需要使用替代平台来估算EVI。我们在干旱的科罗拉多河下游420,083公顷的区域中将Landsat 5(2000–2011),8(2013–2016)和可见红外成像辐射计套件(VIIRS; 2013–2016)与MODIS EVI(2000–2016)进行了比较墨西哥三角洲。在具有混合土地覆盖或农业领域的大区域中,我们发现Landsat与MODIS EVI之间的对应关系很高(整个研究区域的R 2 = 0.93,农业领域为0.97),但在裸土(R 2 = 0.27)和河岸植被(R 2 = 0.48)。在大而均匀的地区,MODIS与Landsat EVI之间的相关性较高,而在狭窄的河岸地区,其相关性通常较低。 VIIRS和MODIS EVI高度相似(在整个研究区域中,R 2 = 0.99),并且在较小,较窄的区域中,与Landsat相比,性能没有下降。 Landsat和VIIRS提供了与MODIS相似的质量和特征的EVI估算,但是在特定地区实施Landsat EVI之前应考虑规模,季节性和土地覆盖类型。

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