Fraction of Photosynthetically Active Radiation (FPAR) - AVHRR
These data describe the Australia-wide, monthly fraction of Photosynthetically Active Radiation absorbed by vegetation (fPAR) derived from Advance Very High Resolution Radiometer data spanning July 1981 to Oct 2011. FPAR is linearly related to fractional foliage cover. Here fPAR is split into that of persistent vegetation and of recurrent vegetation, which represent non-deciduous perennial vegetation and annual, ephemeral and deciduous vegetation, respectively. Data have been processed using the "invariant cover triangle" method to remove the majority of errors introduced by sensor calibration and change-over effects.
Simple
Identification info
- Date (Creation)
- 2013-01-29
- Date (Publication)
- 2021-09-22
- Date (Revision)
- 2024-12-16
- Edition
- 1.0
Publisher
Author
CSIRO Land and Water (2014-2022) - Donohue, Randall (Senior Research Scientist)
147 Underwood Avenue, Floreat, 6014, Western Australia, Australia
Floreat
Western Australia
6014
Australia
Co-author
CSIRO Land and Water (2014-2022) - McVicar, Tim (Research Scientist)
147 Underwood Avenue, Floreat, 6014, Western Australia, Australia
Floreat
Western Australia
6014
Australia
Co-author
Australian National University - Roderick, Michael ()
10 East Road, Acton, 2601, Australian Capital Territory, Australia
Acton
Australian Capital Territory
2601
Australia
- Website
- https://www.tern.org.au/
- Purpose
- Data are suited to the analysis of long-term dynamics (trends) in vegetation cover. Data are monthly grids of 0.08 degree cell size from July 1981 onwards and of 0.01 degree from Feb 1995 onwards.
- Credit
- We at TERN acknowledge the Traditional Owners and Custodians throughout Australia, New Zealand and all nations. We honour their profound connections to land, water, biodiversity and culture and pay our respects to their Elders past, present and emerging.
- Credit
- This dataset has been developed by the Time Series Remote Sensing Team, CSIRO Land and Water in conjunction with the Environmental Biology Group at the Australian National University. The original data were supplied by CSIRO Marine and Atmospheric Research. This work has been supported by the eWater CRC.
- Status
- Completed
Point of contact
CSIRO Land and Water (2014-2022) - Donohue, Randall (Senior Research Scientist)
147 Underwood Avenue, Floreat, 6014, Western Australia, Australia
147 Underwood Avenue
Floreat
Western Australia
6014
Australia
- Topic category
-
- Imagery base maps earth cover
Extent
- Description
- Australia
N
S
E
W
))
Temporal extent
- Time period
- 1981-07-01 2011-10-31
Vertical element
- Minimum value
- 0.0
- Maximum value
- 0.0
- Reference system type
- Geodetic Geographic 3D
- Title
- Donohue RJ, McVicar TR, Roderick ML (2009). Climate-related trends in Australian vegetation cover as inferred from satellite observations, 1981-2006. Global Change Biology, 15(4) pp.1025-1039
- Website
-
Donohue RJ, McVicar TR, Roderick ML (2009). Climate-related trends in Australian vegetation cover as inferred from satellite observations, 1981-2006. Global Change Biology, 15(4) pp.1025-1039
Related documentation
- Title
- Donohue RJ, Roderick ML, McVicar TR (2008). Deriving consistent long-term vegetation information from AVHRR reflectance data using a cover-triangle- based framework. Remote Sensing of Environment, 112, pp. 2938-2949
- Website
-
Donohue RJ, Roderick ML, McVicar TR (2008). Deriving consistent long-term vegetation information from AVHRR reflectance data using a cover-triangle- based framework. Remote Sensing of Environment, 112, pp. 2938-2949
Related documentation
- Title
- Donohue RJ, Roderick ML, McVicar TR (2007). Correcting long-term AVHRR reflectance data using the vegetation cover triangle. CSIRO Land and Water Science Report 26/07, Canberra
- Website
-
Donohue RJ, Roderick ML, McVicar TR (2007). Correcting long-term AVHRR reflectance data using the vegetation cover triangle. CSIRO Land and Water Science Report 26/07, Canberra
Related documentation
- GCMD Science Keywords
- ANZSRC Fields of Research
- TERN Platform Vocabulary
- TERN Instrument Vocabulary
- TERN Parameter Vocabulary
- QUDT Units of Measure
- GCMD Horizontal Resolution Ranges
- GCMD Temporal Resolution Ranges
Resource constraints
- Use limitation
- The Creative Commons Attribution 4.0 International (CC BY 4.0) license allows others to copy, distribute, display, and create derivative works provided that they credit the original source and any other nominated parties. Details are provided at https://creativecommons.org/licenses/by/4.0/
- File name
- 88x31.png
- File description
- CCBy Logo from creativecommons.org
- File type
- png
- Title
- Creative Commons Attribution 4.0 International Licence
- Alternate title
- CC-BY
- Edition
- 4.0
- Access constraints
- License
- Use constraints
- Other restrictions
- Other constraints
- TERN services are provided on an "as-is" and "as available" basis. Users use any TERN services at their discretion and risk. They will be solely responsible for any damage or loss whatsoever that results from such use including use of any data obtained through TERN and any analysis performed using the TERN infrastructure. <br />Web links to and from external, third party websites should not be construed as implying any relationships with and/or endorsement of the external site or its content by TERN. <br /><br />Please advise any work or publications that use this data via the online form at https://www.tern.org.au/research-publications/#reporting
- Other constraints
- Please cite this dataset as {Author} ({PublicationYear}). {Title}. {Version, as appropriate}. Terrestrial Ecosystem Research Network. Dataset. {Identifier}.
Resource constraints
- Classification
- Unclassified
- Supplemental Information
- Please refer to the "AVHRR_VegData_readme_v5.txt" file.
Distribution Information
- Distribution format
-
- NetCDF
Distributor
Distributor
Distribution Information
- Distribution format
-
Distributor
Distributor
Terrestrial Ecosystem Research Network
80 Meiers Road, Indooroopilly, Queensland, 4068, Australia
Indooroopilly
Queensland
4068
Australia
- OnLine resource
- CSIRO Data Access Portal
- OnLine resource
- ro-crate-metadata.json
Data quality info
- Hierarchy level
- Dataset
- Other
- Data are derived from NOAA AVHRR Red and Near Infra-Red reflectances. Reflectances were calibrated using the invariant-cover-triangle methodology (Donohue et al., 2008). This method makes relative calibrations for both atmospheric interferences and sensor calibration errors to produce data suitable for long-term vegetation dynamics analyses. Refer to readme file for details. These data have been corrected specifically for use in looking at long-term dynamics. The majority of sensor calibration and sensor change-over errors have been removed as have most Rayleigh (molecular) and aerosol scattering. Water vapour absorption and viewing angle (i.e., BRDF) effects have not been removed from the data. Some months in the PAL data series have had data from portions of the country masked out due to poor data quality. These months and the approximate regions covered by masks are indicated in the list at the end of the readme file (see Donohue et al., 2007 for full details).
Report
Result
- Statement
- No assessment of accuracy has been performed on this data although the greatest possible precision of AVHRR-derived NDVI/fPAR data is around 0.01-0.02. Spatial accuracy of the HRPT LAC data is to within half a pixel.
Resource lineage
- Statement
- ENVI data are available from CSIRO DAP, https://doi.org/10.4225/08/50FE0CBE0DD06.
- Hierarchy level
- Dataset
Process step
- Description
- Spatial resolution: Pathfinder AVHRR Land (PAL) data (0.08 degree resolution), spanning July 1981-April 1994, have been combined with High Resolution Picture Transmission (HRPT) data (0.01 degree resolution), spanning February 1995-December 2006. When the HRPT data are supplied at 0.08 degree-equivalent resolution, the original 0.01 degree HRPT data have been resampled to 0.08 degrees by averaging the data into 64-pixel squares which approximately align with overlying PAL pixels.
Process step
- Description
- Version history: Version 3: Data produced using the method described in Donohue et al. (2008). This version was created in March 2008, and included minor refinements to V2 to address feedback from the Remote Sensing of Environment external reviewers. Version 4: Update to the persistent and recurrent fPAR data (7 July 2008). A coding error was found in the program used to create the FTP version of the dataset. Whilst this would have only affected the persistent and recurrent data, all variables have been recalculated. Version 5: Created as an update to version 4 extending it to October 2011. The global thresholds used to rescale NDVI to fPAR were recalculated for the HRPT (0.01) data. This means the fPAR data values for the months within the 1992-2006 period are likely to differ from values in the same months in version 4. All data from the GAC (0.08) data are the same as version 4.
Reference System Information
- Reference system identifier
- EPSG/EPSG:4326
- Reference system type
- Geodetic Geographic 2D
Metadata
- Metadata identifier
-
urn:uuid/37788b5f-8084-4522-9fc8-9ae29d43c918
- Title
- TERN GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
Point of contact
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://geonetwork.tern.org.au/geonetwork/srv/eng/catalog.search#/metadata/37788b5f-8084-4522-9fc8-9ae29d43c918
Point-of-truth metadata URL
- Date info (Creation)
- 2013-01-29T00:00:00
- Date info (Revision)
- 2024-12-16T00:00:00
Metadata standard
- Title
- ISO 19115-1:2014/AMD 1:2018 Geographic information - Metadata - Fundamentals
- Edition
- 1
Metadata standard
- Title
- ISO/TS 19115-3:2016
- Edition
- 1.0
Metadata standard
- Title
- ISO/TS 19157-2:2016
- Edition
- 1.0
- Title
- Terrestrial Ecosystem Research Network (TERN) Metadata Profile of ISO 19115-3:2016 and ISO 19157-2:2016
- Date (published)
- 2021
- Edition
- 1.0
Identifier
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available