LifePulse - NDVI & EVI at a Global scale (Seasonal rhythms)

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  • Опубликовано: 5 янв 2025
  • This time-lapse shows the MODIS NDVI & EVI at a Global scale to represent the seasonal rhythm of vegetation in space and time.
    Land surface phenology:
    Remote sensing is used to track the seasonal changes in vegetation. Land surface phenology (LSP) is the satellite-detected cyclic pattern of change in terrestrial vegetation. It uses space-borne greenness proxies to monitor plant phenology at the landscape level from the regional to global scale. NDVI images from MODIS or Landsat can monitor phenology. The Normalized Difference Vegetation Index (NDVI) is a simple graphical indicator that can analyze remote sensing measurements, often from a space platform, assessing whether the observed target contains live green vegetation.
    MODIS products:
    I used the MODIS Vegetation Indices (NDVI/EVI) 16-Day Global 1 km. MODIS vegetation indices, produced at 16-day intervals and multiple spatial resolutions, provide consistent spatial and temporal comparisons of vegetation canopy greenness, a composite property of leaf area, chlorophyll, and canopy structure. Two vegetation indices are derived from atmospherically corrected reflectance in the red, near-infrared, and blue wavebands; the Normalized Difference Vegetation Index (NDVI), which provides continuity with NOAA's AVHRR NDVI time series record for historical and climate applications, and the Enhanced Vegetation Index (EVI), which minimizes canopy-soil variations and improves sensitivity over dense vegetation conditions. The two products more effectively characterize the global range of vegetation states and processes.
    Edition: Oliver Gutiérrez-Hernández
    Time Lapse Creator: streamlit.gish.... This web app is maintained by Qiusheng Wu

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