![NOAA/CDR/AVHRR/LAI_FAPAR/V5](https://developers.google.com/earth-engine/datasets/images/NOAA/NOAA_CDR_AVHRR_LAI_FAPAR_V5_sample.png) Dataset Availability : 1981-06-24T00:00:00Z--2013-12-31T00:00:00Z Dataset Producer : [NOAA](https://www.ncei.noaa.gov/products/climate-data-records/leaf-area-index-and-fapar) Cadence : 1 Day Tags : [avhrr](https://developers.google.com/earth-engine/datasets/tags/avhrr) [cdr](https://developers.google.com/earth-engine/datasets/tags/cdr) [daily](https://developers.google.com/earth-engine/datasets/tags/daily) [fapar](https://developers.google.com/earth-engine/datasets/tags/fapar) [lai](https://developers.google.com/earth-engine/datasets/tags/lai) [land](https://developers.google.com/earth-engine/datasets/tags/land) [noaa](https://developers.google.com/earth-engine/datasets/tags/noaa) [plant-productivity](https://developers.google.com/earth-engine/datasets/tags/plant-productivity) #### Description The NOAA Climate Data Record (CDR) of AVHRR Leaf Area Index (LAI) and Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) dataset contains derived values that characterize the canopy and photosynthetic activity of plants. This dataset is derived from the NOAA AVHRR Surface Reflectance product and is gridded at a resolution of 0.05° on a daily basis. The values are computed globally over land surfaces, but not over bare or very sparsely vegetated areas, permanent ice or snow, permanent wetland, urban areas, or water bodies. Known issues with this dataset include: - TIMEOFDAY variable contains values that are too large by 1 day - Latitude values are not correctly associated with the center of the grid cell, error is \< 0.002 degrees - Longitude values are not correctly associated with the center of the grid cell, error is \< 0.02 degrees See [technical note from the data provider](https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/Leaf_Area_Index_and_FAPAR/AVHRR/AlgorithmDescriptionAVHRR_01B-20c.pdf). Provider's note: the orbital drift of N-19 (the last NOAA satellite carrying the AVHRR sensor) began to severely degrade the retrieved product quality. Therefore, VIIRS is now the primary sensor being used for these products from 2014-present. ### Bands **Bands** Pixel size: 5566 meters (all bands) | Name | Min | Max | Scale | Pixel Size | Description | |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | `LAI` | 0\* | 6205\* | 0.001 | 5566 meters | Leaf area index | | `FAPAR` | 0\* | 896\* | 0.001 | 5566 meters | Fraction of absorbed photosynthetic active radiation | | `QA` | | | | 5566 meters | Quality control bit flags | | Bitmask for QA - Bits 0-1: Quality control - 0: Ok - 1: Input flags as cloudy - 2: Invalid input - 3: Output out of range - Bits 2-4: Associated class - 1: Needleleaf forest - 2: Broadleaf forest - 4: Grassland \& croplands \& non vegetated - 5: Evergreen broadleaf forest - 6: Water - Bit 5: BRDF corrected - 0: No - 1: Yes - Bits 6-7: Polygon test - 0: In polygon - 1: Not in polygon - 2: Not tested (water/cloudy) |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| \* estimated min or max value ### Image Properties **Image Properties** | Name | Type | Description | |---|---|---| | status | STRING | 'provisional' or 'permanent' | ### Terms of Use **Terms of Use** The NOAA CDR Program's official distribution point for CDRs is NOAA's National Climatic Data Center which provides sustained, open access and active data management of the CDR packages and related information in keeping with the United States' open data policies and practices as described in the President's Memorandum on "Open Data Policy" and pursuant to the Executive Order of May 9, 2013, "Making Open and Machine Readable the New Default for Government Information". In line with these policies, the CDR data sets are nonproprietary, publicly available, and no restrictions are placed upon their use. For more information, see the [Fair Use of NOAA's CDR Data Sets, Algorithms and Documentation](https://www1.ncdc.noaa.gov/pub/data/sds/cdr/CDRs/Aerosol_Optical_Thickness/UseAgreement_01B-04.pdf) pdf. ### Citations Citations: - Martin Claverie, Eric Vermote, and NOAA CDR Program (2014): NOAA Climate Data Record (CDR) of Leaf Area Index (LAI) and Fraction of Absorbed Photosynthetically Active Radiation (FAPAR), Version 4. \[indicate subset used\]. NOAA National Climatic Data Center. [doi:10.7289/V5M043BX](https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.ncdc:C00898) ### DOIs - ### Explore with Earth Engine > [!NOTE] > **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine) ### Code Editor (JavaScript) ```javascript var dataset = ee.ImageCollection('NOAA/CDR/AVHRR/LAI_FAPAR/V5') .filter(ee.Filter.date('2018-02-01', '2018-03-01')); var leafAreaIndex = dataset.select('LAI'); var leafAreaIndexVis = { min: 0.0, max: 4000.0, palette: ['3b0200', '977705', 'ca9f06', 'ffca09', '006a03', '003b02'], }; Map.setCenter(20, 24.5, 2); Map.addLayer(leafAreaIndex, leafAreaIndexVis, 'Leaf Area Index'); ``` [Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NOAA/NOAA_CDR_AVHRR_LAI_FAPAR_V5) [NOAA CDR AVHRR LAI FAPAR: Leaf Area Index and Fraction of Absorbed Photosynthetically Active Radiation, Version 5](https://developers.google.com/earth-engine/datasets/catalog/NOAA_CDR_AVHRR_LAI_FAPAR_V5) The NOAA Climate Data Record (CDR) of AVHRR Leaf Area Index (LAI) and Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) dataset contains derived values that characterize the canopy and photosynthetic activity of plants. This dataset is derived from the NOAA AVHRR Surface Reflectance product and is gridded at a resolution ... NOAA/CDR/AVHRR/LAI_FAPAR/V5, avhrr,cdr,daily,fapar,lai,land,noaa,plant-productivity 1981-06-24T00:00:00Z/2013-12-31T00:00:00Z -90 -180 90 180 Google Earth Engine https://developers.google.com/earth-engine/datasets - [https://doi.org/10.7289/V5M043BX](https://doi.org/https://www.ncei.noaa.gov/products/climate-data-records/leaf-area-index-and-fapar) - [https://doi.org/10.7289/V5M043BX](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NOAA_CDR_AVHRR_LAI_FAPAR_V5)