N: 90 S: -90 E: 180 W: -180
Description
The MCD12Q2 Version 6 data product was decommissioned on July 31, 2023. Users are encouraged to use the MCD12Q2 Version 6.1 data product.
The Terra and Aqua combined Moderate Resolution Imaging Spectroradiometer (MODIS) Land Cover Dynamics (MCD12Q2) Version 6 data product provides global land surface phenology metrics at yearly intervals from 2001 to 2019. The MCD12Q2 Version 6 data product is derived from time series of the 2-band Enhanced Vegetation Index (EVI2) calculated from MODIS Nadir Bidirectional Reflectance Distribution Function (BRDF)-Adjusted Reflectance (NBAR). Vegetation phenology metrics at 500 meter spatial resolution are identified for up to two detected growing cycles per year. For pixels with more than two valid vegetation cycles, the data represent the two cycles with the largest NBAR-EVI2 amplitudes.
Provided in each MCD12Q2 Version 6 Hierarchical Data Format 4 (HDF4) file are layers for the total number of vegetation cycles detected for the product year, the onset of greenness, greenup midpoint, maturity, peak greenness, senescence, greendown midpoint, dormancy, EVI2 minimum, EVI2 amplitude, integrated EVI2 over a vegetation cycle, as well as overall and phenology metric-specific quality information. A low-resolution browse image showing greenup is also available when viewing each MCD12Q2 granule. SDS layers may be multi-dimensional with up to two valid vegetation cycles.
For areas where the NBAR-EVI2 values are missing due to cloud cover or other reasons, the data gaps are filled with good quality NBAR-EVI2 values from the year directly preceding or following the product year.
Known Issues
- Known issues are described on pages 5 and 6 of the User Guide.
- For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.
Version Description
Product Summary
Citation
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
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File Naming Convention
The file name begins with the Product Short Name (MCD12Q2) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2003001), the Tile Identifier which is horizontal tile and vertical tile provided as hXXvYY (h25v07), the Version of the data collection (006), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2019042212453), and the Data Format (hdf).
Documents
USER'S GUIDE
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
PRODUCT QUALITY ASSESSMENT
Publications Citing This Dataset
Variables
The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|
| Dormancy | Date when EVI2 last crossed 15% of the segment EVI2 amplitude | Day | int16 | 32767 | 11138 to 32766 | N/A |
| EVI_Amplitude | Segment maximum - minimum EVI2 | EVI2 | int16 | 32767 | 0 to 10000 | 0.0001 |
| EVI_Area | Sum of daily interpolated EVI2 from Greenup to Dormancy | EVI2 | int16 | 32767 | 0 to 3700 | 0.1 |
| EVI_Minimum | Segment minimum EVI2 value | EVI2 | int16 | 32767 | 0 to 10000 | 0.0001 |
| Greenup | Date when EVI2 first crossed 15% of the segment EVI2 amplitude | Day | int16 | 32767 | 11138 to 32766 | N/A |
| Maturity | Date when EVI2 first crossed 90% of the segment EVI2 amplitude | Day | int16 | 32767 | 11138 to 32766 | N/A |
| MidGreendown | Date when EVI2 last crossed 50% of the segment EVI2 amplitude | Day | int16 | 32767 | 11138 to 32766 | N/A |
| MidGreenup | Date when EVI2 first crossed 50% of the segment EVI2 amplitude | Day | int16 | 32767 | 11138 to 32766 | N/A |
| NumCycles | Total number of valid vegetation cycles with peak in product year | Number | int16 | 32767 | 0 to 7 | N/A |
| Peak | Date when EVI2 reached the segment maximum | Day | int16 | 32767 | 11138 to 32766 | N/A |
| QA_Detailed | Bit-packed, SDS-specific QA codes | Bit Field | int16 | 32767 | 0 to 16383 | N/A |
| QA_Overall | QA code for entire segment | Class | int16 | 32767 | 0 to 3 | N/A |
| Senescence | Date when EVI2 last crossed 90% of the segment EVI2 amplitude | Day | int16 | 32767 | 11138 to 32766 | N/A |