Monthly Global Vegetation Indices from MODIS/Aqua Satellite

MODIS/Aqua Vegetation Indices Monthly L3 Global 0.05Deg CMG V061 provides global monthly composites of vegetation health indices. The dataset includes the Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI), along with quality assurance and reflectance data, projected on a 0.05-degree Climate Modeling Grid. It is produced by LPCLOUD using data from the Aqua satellite's MODIS instrument.

Use Cases

• Modeling crop yield anomalies by analyzing temporal trends in the NDVI and EVI fields for agricultural regions.
• Detecting drought stress by correlating the VI QA (quality assurance) layer and reflectance data with precipitation records.
• Monitoring deforestation through time-series analysis of the NDVI mean and standard deviation statistics.
• Calibrating ecosystem models using the angular information and spatial statistics fields for improved biomass estimation.

Strengths

• Provides two primary vegetation indices (NDVI and EVI) designed for continuity and improved sensitivity.
• Data is projected on a consistent 0.05-degree geographic grid with 3600 rows and 7200 columns.
• Includes auxiliary data fields for quality assurance, reflectance, angular information, and spatial statistics.

Limitations

• Specific temporal coverage, row count, and update frequency are not provided in the input.
• Known data issues exist, requiring users to consult the external MODIS/VIIRS Land Quality Assessment website.
• The algorithm employs weighted temporal averaging, which may smooth out short-term vegetation events.

Provenance

Source

LPCLOUD, utilizing NASA's Aqua satellite Moderate Resolution Imaging Spectroradiometer (MODIS).

Collection Method

Weighted temporal averaging of all MYD13A2 products overlapping each month, projected to a 0.05-degree Climate Modeling Grid.

Time Range

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Freshness

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Geography

Global coverage.