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Online Data: Standard VGPM

2160 by 4320 Monthly XYZ files from VIIRS R2022 Data

note: data updated 10.17.2023 using the new VIIRS.R2022 reprocessing results
note: data updated 06.22.2018 using the new VIIRS.R2018 reprocessing results

To get these data, please click on the file name(s) that you have selected and save locally on your computer. The individual xyz files are gzipped (use gunzip to uncompress) and the tar files contain gzipped xyz files.

different grid size, timestep, or format?

Data Selection

You can either download annual tar files with the data we have for each year, or you can access the individual monthly files at the end of this page.

Annual Tar Files

vgpm.v.2012.xyz.tar• 2012 data: ~ 505 MB of compressed data
vgpm.v.2013.xyz.tar• 2013 data: ~ 504 MB of compressed data
vgpm.v.2014.xyz.tar• 2014 data: ~ 503 MB of compressed data
vgpm.v.2015.xyz.tar• 2015 data: ~ 504 MB of compressed data
vgpm.v.2016.xyz.tar• 2016 data: ~ 506 MB of compressed data
vgpm.v.2017.xyz.tar• 2017 data: ~ 506 MB of compressed data
vgpm.v.2018.xyz.tar• 2018 data: ~ 506 MB of compressed data
vgpm.v.2019.xyz.tar• 2019 data: ~ 506 MB of compressed data
vgpm.v.2020.xyz.tar• 2020 data: ~ 506 MB of compressed data
vgpm.v.2021.xyz.tar• 2021 data: ~ 507 MB of compressed data
vgpm.v.2022.xyz.tar• 2022 data: ~ 506 MB of compressed data
vgpm.v.2023.xyz.tar• 2023 data: ~ 506 MB of compressed data

xyz file naming convention

vgpm.yyyyddd.all.xyz.gz

vgpm = net primary production (units of mg C / m**2 / day) based on the standard vgpm algorithm
yyyy = year
ddd = day of year of the start of each monthly file
all = all pixels output, including those with no data (nodata = -9999)
xyz = text file, where x = longitude, y = latitude and z = npp value
gz = compressed with gzip (uncompress with gunzip)

note: The xyz files have a single header line, indicating the order of the variables and the value of nodata.

npp is based on the standard vgpm, using modis chl, sst4, and par as input; clouds have been filled in the input data using our own gap-filling software.

These xyz data have been extracted from 2160 x 4320 global monthly grids, and the locations given represent the center of each pixel.

For citation, please reference the original vgpm paper by Behrenfeld and Falkowski, 1997a as well as the Ocean Productivity site for the data.

Monthly Files

 201220132014201520162017201820192020202120222023
January 2012001 2013001 2014001 2015001 2016001 2017001 2018001 2019001 2020001 2021001 2022001 2023001
February 2012032 2013032 2014032 2015032 2016032 2017032 2018032 2019032 2020032 2021032 2022032 2023032
March 2012061 2013060 2014060 2015060 2016061 2017060 2018060 2019060 2020061 2021060 2022060 2023060
April 2012092 2013091 2014091 2015091 2016092 2017091 2018091 2019091 2020092 2021091 2022091 2023091
May 2012122 2013121 2014121 2015121 2016122 2017121 2018121 2019121 2020122 2021121 2022121 2023121
June 2012153 2013152 2014152 2015152 2016153 2017152 2018152 2019152 2020153 2021152 2022152 2023152
July 2012183 2013182 2014182 2015182 2016183 2017182 2018182 2019182 2020183 2021182 2022182 2023182
August 2012214 2013213 2014213 2015213 2016214 2017213 2018213 2019213 2020214 2021213 2022213 2023213
September 2012245 2013244 2014244 2015244 2016245 2017244 2018244 2019244 2020245 2021244 2022244 2023244
October 2012275 2013274 2014274 2015274 2016275 2017274 2018274 2019274 2020275 2021274 2022274 2023274
November 2012306 2013305 2014305 2015305 2016306 2017305 2018305 2019305 2020306 2021305 2022305 2023305
December 2012336 2013335 2014335 2015335 2016336 2017335 2018335 2019335 2020336 2021335 2022335 2023335


Last modified: 17 October 2023
by:  Robert O'Malley

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