MCD15A3_005

MODIS/Terra+Aqua Leaf Area Index/FPAR 4-Day L4 Global 1km SIN Grid V005

Version 005
  • Abstract
    Leaf Area Index (LAI) is a dimensionless variable defined as the total one-sided area of green leaves in a vegetation canopy relative to a unit ground area. LAI ignores canopy details such as leaf angle distribution, canopy height or shape. LAI values typically range from 0 for bare ground to 6 or above for a dense forest. Fraction of Photosynthetically Active Radiation absorbed by vegetation (FPAR) is also a dimensionless variable defined as the fraction of the photosynthetically active radiation absorbed by vegetation. FPAR is directly related to the primary productivity function of photosynthesis, and therefore, used to estimate the assimilation of CO2 in vegetation. Both variables are used to calculate surface photosynthesis, evapotranspiration, and net primary production, which help model the terrestrial energy, carbon, and biogeochemical components of vegetation. In contrast to the Terra-MODIS (MOD15A2), Aqua-MODIS (MYD15A2), and the combined Terra and Aqua MODIS (MCD15A2) versions of the 8-day LAI and FPAR products, the level-4 combined (Terra and Aqua) MODIS global LAI and FPAR product is composited every 4 days at 1-kilometer resolution. Projected on a Sinusoidal grid, the MCD15A3 product includes the following Science Data Sets (SDS): LAI, FPAR, and a set of quality rating, and standard deviation layers for each variable. The increased temporal frequency of the 4-day product helps in monitoring phenology and associated rapid changes (that occur within less than a week) especially during transition periods (green-up and senescence). V005 Data Set Characteristics: Temporal Coverage: July 4, 2002 - March 29, 2017 Area: ~10 degrees x 10 degrees lat/long Image Dimensions: 1200 x 1200 rows/columns Spatial Resolution: 1 km File Size: 1.1 MB Resolution: 1000 meters Projection: Sinusoidal Science Data Sets (SDS HDF Layers): 6
  • Purpose
    Science Research
  • Version Description
    Collection Version 5 Processing and Reprocessing

Data Identification Fields:

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    Data Dates
    Creation
    Last Revision
    Processing Level

    4

    GRID

    Quality
    Collection Progress

    Complete

    Access Constraints

    None

Related URLs
    Science Keywords
    • EARTH SCIENCE
    • BIOSPHERE
    • VEGETATION
    • LEAF CHARACTERISTICS
    • EARTH SCIENCE
    • BIOSPHERE
    • VEGETATION
    • PHOTOSYNTHETICALLY ACTIVE RADIATION

Acquisition Information Fields:

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Platforms
  • Earth Observation Satellites
    Terra
    Instruments
    • MODIS
  • Earth Observation Satellites
    Aqua
    Instruments
    • MODIS

Temporal Information Fields:

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Spatial Information Fields:

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    Coverage Type Zone Identifier Geometry Granule Representation
    HORIZONTAL CARTESIAN GEODETIC
    Tiling Identification Systems
    System Name Coordinate 1 Min Coordinate 1 Max Coordinate 2 Min Coordinate 2 Max
    MODIS Tile SIN 0.0 35.0 0.0 17.0
Location Keywords

Data Centers

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  • LP DAAC
    ARCHIVER
    Land Processes Distributed Active Archive Center

    U.S. Geological Survey, Earth Resources Observation and Science (EROS) Center
    Sioux Falls, South Dakota 57198

    M-F, 8 a.m. to 4 p.m. Central Time
    • 605-594-6116
    • 605-594-6963
    • Email
    Contact Details

    None

  • NASA/GSFC/SED/ESD/HBSL/BISB/MODAPS
    PROCESSOR
    MODIS Adaptive Processing System, Biospheric Information Systems Branch, Hydrospheric and Biospheric Sciences Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

    NASA/GSFC Code 922
    GREENBELT, Maryland 20771

    Contact Details

    Contact for data content concerns

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Collection Citations Fields:

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