MOD17A2HGF.061: Terra Gross Primary Productivity 8-Day Global 500m

AI-generated Key Takeaways

• The MOD17A2HGF V6.1 product provides an 8-day composite of Gross Primary Productivity (GPP) at 500m resolution, derived using the radiation use efficiency concept.

• This dataset, spanning from 2021-01-01 to 2023-12-27, offers insights into terrestrial energy, carbon, water cycles, and vegetation biogeochemistry.

• Key bands include GPP, Net Photosynthesis (PsnNet), and a quality control band (Psn_QC).

• Data is freely available for use, sale, or redistribution with proper citation attributed to NASA LP DAAC at the USGS EROS Center.

• Users can access and analyze the dataset via Google Earth Engine, with code snippets provided for seamless integration.

Dataset Availability

2021-01-01T00:00:00Z–2024-12-26T00:00:00Z

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Earth Engine Snippet

ee.ImageCollection("MODIS/061/MOD17A2HGF")

Cadence

8 Days

Tags

8-day global gpp modis nasa photosynthesis plant-productivity productivity psn terra usgs

Description

The MOD17A2HGF Version 6.1 Gross Primary Productivity (GPP) product is a cumulative 8-day composite of values with 500 meter (m) pixel size based on the radiation use efficiency concept that can be potentially used as inputs to data models to calculate terrestrial energy, carbon, water cycle processes, and biogeochemistry of vegetation.

Documentation:

• User's Guide

• Algorithm Theoretical Basis Document (ATBD)

• General Documentation

Bands

Pixel Size
500 meters

Bands

Name	Units	Min	Max	Scale	Pixel Size	Description
Gpp	kg*C/m^2	0	3000	0.0001	meters	Gross primary production
PsnNet	kg*C/m^2	-3000	3000	0.0001	meters	Net photosynthesis; GPP minus the maintenance respiration (MR)
Psn_QC					meters	Quality control bits
Bitmask for Psn_QC Bit 0: MODLAND QC bits 0: Good quality 1: Other quality Bit 1: Sensor 0: Terra 1: Aqua Bit 2: Dead detector 0: Detectors apparently fine for up to 50% of channels 1, 2 1: Dead detectors caused >50% adjacent detector retrieval Bits 3-4: Cloud state 0: Significant clouds NOT present (clear) 1: Significant clouds WERE present 2: Mixed cloud present on pixel 3: Cloud state not defined, assumed clear Bits 5-7: 5-level confidence quality score 0: Very best possible 1: Good, very usable, but not the best 2: Substandard due to geometry problems - use with caution 3: Substandard due to other than geometry problems - use with caution 4: Couldn't retrieve pixel (NOT PRODUCED AT ALL - non-terrestrial biome) 7: Fill Value

Terms of Use

Terms of Use

MODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.

Citations

Citations:

• Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.

DOIs

• https://doi.org/10.5067/MODIS/MOD17A2HGF.061

Explore with Earth Engine

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.

Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/061/MOD17A2HGF')
                  .filter(ee.Filter.date('2021-01-01', '2021-05-01'));

var gpp = dataset.select('Gpp');
var gppVis = {
  min: 0,
  max: 600,
  palette: ['bbe029', '0a9501', '074b03'],
};
Map.setCenter(6.746, 46.529, 2);
Map.addLayer(gpp, gppVis, 'GPP');

Open in Code Editor

MOD17A2HGF.061: Terra Gross Primary Productivity 8-Day Global 500m

The MOD17A2HGF Version 6.1 Gross Primary Productivity (GPP) product is a cumulative 8-day composite of values with 500 meter (m) pixel size based on the radiation use efficiency concept that can be potentially used as inputs to data models to calculate terrestrial energy, carbon, water cycle processes, and biogeochemistry of …

MODIS/061/MOD17A2HGF, 8-day,global,gpp,modis,nasa,photosynthesis,plant-productivity,productivity,psn,terra,usgs

2021-01-01T00:00:00Z/2024-12-26T00:00:00Z

-90 -180 90 180

Google Earth Engine

https://developers.google.com/earth-engine/datasets

• https://doi.org/10.5067/MODIS/MOD17A2HGF.061
• https://doi.org/10.5067/MODIS/MOD17A2HGF.061