Scheduled maintenance: 8-10 am ACT/NSW each Wednesday. Expect shutdowns and restarts.

Contact us: data at auscover.org.au  |  Disclaimer: Please read
Product pages » Chlorophyll fraction of photosynthetic radiation (fPARchl) - MODIS, UTS algorithm, Australia coverage

Chlorophyll fraction of photosynthetic radiation (fPARchl) - MODIS, UTS algorithm, Australia coverage

Last modified by Matt Paget on 2016/06/29 11:47

Chlorophyll fraction of photosynthetic radiation (fPARchl) - MODIS, UTS algorithm, Australia coverage

fPARchl.png

Figure 1: fPARchl image from NetCDF file for 1-Jan-2014 over Australia

Link to the data

DescriptorData link
Persistent URLhttp://www.auscover.org.au/purl/modis-fpar-chl-uts
GeoNetwork record
netCDFhttp://data.c3.uts.edu.au/thredds/catalog/auscover/FPAR_nc_v01/catalog.html
GeoTiffhttp://data.c3.uts.edu.au/thredds/catalog/auscover/FPAR_tif_v01/catalog.html

Data licence and Access rights

ItemDetail
RightsCopyright 2014 UTS. Rights owned by the University of Technology Sydney (UTS). Rights licensed subject to Creative Commons Attribution (CC BY).
LicenceCreative Commons Attribution 3.0 License, http://creativecommons.org/licenses/by/3.0.
AccessThese data can be freely downloaded and used subject to the CC BY licence. Attribution and citation is required as described at http://www.auscover.org.au/citation. We ask that you send us citations and copies of publications arising from work that use these data.

Alternate title

Ecosystem chlorophyll fraction of photosynthetic radiation (fPARchl)

Abstract or Summary

The fraction of photosynthetically active radiation (fPAR) is a parameter used in remote sensing and in ecosystem modelling that signifies the portion of PAR used by plants. fPAR is commonly used as a driver in ecosystem models. 

This product represents the ecosystem fraction of photosynthetic radiation (fPAR) absorbed by chlorophyll (fPAR chl), where total fPAR can be separated on two main components, the green leaves (fPARgreen) and woody stems and branches portions of the canopy (fPARbrown) and subsequently, fPARgreen can be parted into fPAR from the photosynthetic chlorophyll and non-photosynthetic (e.g. cellulose) components of the canopy, fPARchl and fPARnon-chl, respectively.

The product data were quality filtered based on the Quality Control (QC) layers provided with the MODIS data and gap filled. The data were reprojected to geographic projection (WGS 84 datum) and provide spatial coverage of Australia. 

Spatial and Temporal extents

ItemDetail
Spatial resolution (metres)0.05 degree (5600 m)
Spatial coverage (degrees)113 to 154 E, 10 to 44 S
Temporal resolutionmonthly
Temporal coverage2014-03 to ongoing(MOD13C2)
Sensor & platformMODIS Terra(MOD13C2)
ItemDetail
Spatial representation typeGrid
Spatial reference systemWGS 84
 UnitUnitless

Point of contact

ItemDetail
NameProf. Alfredo Huete
OrganisationUniversity of Technology Sydney (UTS)
PositionProfessor
Emailalfredo.huete@uts.edu.au
RolePrinciple Investigator
Address15 Broadway Road, Ultimo, NSW 2007, Australia
Telephone+61 2 9514 4084
URLwww.c3.uts.edu.au

Credit

This dataset was developed by the Remote Sensing Group at UTS. The original data were supplied by the Land Processes Distributed Active Archive Center (LPDAAC), located at the U.S. Geological Survey (USGS) Earth Resources Observation and Science Center (EROS) http://lpdaac.usgs.gov.

Keywords

ThesauriKeyword
GCMDEARTH SCIENCE > BIOSPHERE > VEGETATION > PHOTOSYNTHETICALLY ACTIVE RADIATION
CF
FoREnvironmental Sciences > Ecological Applications = 0501

There are three main thesauri that AusCover recommends:

  1. Global Change Master Directory (http://gcmd.nasa.gov)
  2. Climate and Forecast (CF) convention standard names (http://cfconventions.org/standard-names.html).
  3. Fields of Research codes (http://www.abs.gov.au/ausstats/abs@.nsf/0/6BB427AB9696C225CA2574180004463E?opendocument).

Data quality

LPDAAC are responsible for the actual data quality and provide quality channels as part of most products.  These channels are processed the same as the data channels.  The mosaicing, remapping and reformatting processes do not alter either the data or the quality fields.

Quality assessment of the LPDAAC MODIS products is undertaken by the MODIS Land Data Discipline Team, http://landweb.nascom.nasa.gov.

Data set specific link for MOD13C2 product is:

Users should be aware that not all tiles for a particular mosaic necessarily become available from the LPDAAC on the same day.  It is therefore possible that the most recent mosaic for any given product will be updated over several days, each time containing progressively more actual data within the same (standard) geographic extent.

We have had some minor issues with file corruption that have been detected by users unable to un-gzip the mosaic files.  If you discover any such files, please report them to us (see contacts section).

Flags used for MOD13C2 datasets are as below:

Flags           Bit Combination (accepted range)
 MODLAND_QA  <10
 VI usefulness <1100
 Mixed Clouds >0
 Land/Water Flag 001,011,100 and 101
 Possible snow/ice <1
 Possible shadow <1

Validation status

Quality assessment of the LPDAAC MODIS products is undertaken by the MODIS Land Data Discipline Team, http://landweb.nascom.nasa.gov.

Data set specific link for MOD13C2 product is:

Related products

ItemProduct link
Landsat Fractional CoverFractional cover - Landsat, Joint Remote Sensing Research Program algorithm, Australia coverage
MODIS Fractional CoverFractional cover - MODIS, CSIRO Land and Water algorithm, Australia coverage
MODIS LPDAAC fPARLeaf Area Index (LAI) and Fraction of Photosynthetically Active Radiation (fPAR) - MODIS, LPDAAC MOD15A2 mosaic, Australia coverage
AVHRR fPARFraction of Photosynthetically Active Radiation (FPAR) - AVHRR, CSIRO Land and Water algorithm, Australia coverage
MODIS Total CoverTotal cover - MODIS, Land Condition Index (LCI) algorithm, Australia coverage

References

ItemDetail or link
Publication

Natalia Restrepo-Coupe,Kevin Davies, Jason Beringer, Nicolas Boulain, James Cleverly, Derek Eamus, Bradley J. Evans, Eva van Gorsel, Lindsay Hutley, Georgia Koerber, Ray Leuning, Wayne S Meyer, I. Colin Prenctice, Alfredo Huete.(2014).
Chlorophyll fPAR for four-key Australian sites, its seasonality and relationship with MODIS products(in preparation).

Validation report
https://lpdaac.usgs.gov/products/modis_products_table/mod13c2
Online infoCitation for OZflux (http://www.ozflux.org.au)
Online infoAustralian Supersite Network (http://www.tern-supersites.net.au)
Online infoTERN-Terrestrial Ecosystem Network (http://www.tern.org.au)

Algorithm summary

The MOD13C2 data were downloaded from LPDAAC (https://lpdaac.usgs.gov) in HDF format and were quality filtered based on the flags provided in the Quality Control (QC) layers and gap filled. Then the data were reprojected from sinusoidal to geographic projection (WGS 84 datum) in GeoTiff format.

The fPARchl data were calculated as,

fPARchl = EVI x m + c (m = 1.112, c = -0.0746)

Eventually the fPARchl data were converted to netCDF files for each month period.

The LPDAAC product pages, https://lpdaac.usgs.gov/products/modis_products_table/mod13c2 provide links to the ATBDs and other supporting documentation of the HDF datasets used to generate this product.

Detailed user guide and ATBD can be found as the attachment EVI_LST_PRODT_UG_ATBD_Web_v1.pdf.

Product version history

Version labelDetail
1.0Initial release

Metadata history

DateDetail
2014-09-04Metadata creation date
Tags:
Created by Matt Paget on 2014/09/04 10:51

This wiki is licensed under a Creative Commons 2.0 license
XWiki Enterprise 4.5.3 - Documentation