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Please note:

The Ocean Productivity Site has stopped updating its data.
We hope to continue operations shortly.

(09.12.2024)


Online Data: Eppley VGPM

1080 by 2160 Monthly HDF files from MODIS R2022 Data

note: data updated 03.20.2023 using the new MODIS.R2022 reprocessing results

note: data updated 02.20.2018 using the new MODIS.R2018 reprocessing results
note: data updated 08.05.2015 using the new MODIS.R2014 reprocessing results
all data files now based on modis chlor_a and 11-micron daytime SST values
note: data updated 12.13.2013 using the new MODIS.R2013.1 reprocessing results
data files starting with 2012214 are all new ... data before that are unchanged
note: all data updated 4.04.2013 using the new MODIS.R2013 reprocessing results
note: all data updated 6.15.2012 using the new MODIS.R2012 reprocessing results
note: all data updated 8.09.2011 using the new MODIS.R2010.0 (partial) reprocessing results
data files starting with 2008275 are all new ... data before that are unchanged
note: SST4 input data from 2010017 onward were reissued on Jan 21, 2011
 2010 files were updated on this web page Jan 28, 2011
note: all data updated 5.25.2010 using the new MODIS.R2009.1 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 hdf files are gzipped (use gunzip to uncompress) and the tar files contain gzipped hdf files.

different grid size or timestep?

[Note: ancillary input data are available here for those who are interested]

Data Selection

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

Annual Tar Files

eppley.m.2002.tar• 2002 data: ~   24 MB of compressed data
eppley.m.2003.tar• 2003 data: ~   48 MB of compressed data
eppley.m.2004.tar• 2004 data: ~   48 MB of compressed data
eppley.m.2005.tar• 2005 data: ~   48 MB of compressed data
eppley.m.2006.tar• 2006 data: ~   48 MB of compressed data
eppley.m.2007.tar• 2007 data: ~   48 MB of compressed data
eppley.m.2008.tar• 2008 data: ~   48 MB of compressed data
eppley.m.2009.tar• 2009 data: ~   48 MB of compressed data
eppley.m.2010.tar• 2010 data: ~   48 MB of compressed data
eppley.m.2011.tar• 2011 data: ~   48 MB of compressed data
eppley.m.2012.tar• 2012 data: ~   48 MB of compressed data
eppley.m.2013.tar• 2013 data: ~   48 MB of compressed data
eppley.m.2014.tar• 2014 data: ~   48 MB of compressed data
eppley.m.2015.tar• 2015 data: ~   48 MB of compressed data
eppley.m.2016.tar• 2016 data: ~   48 MB of compressed data
eppley.m.2017.tar• 2017 data: ~   48 MB of compressed data
eppley.m.2018.tar• 2018 data: ~   48 MB of compressed data
eppley.m.2019.tar• 2019 data: ~   49 MB of compressed data
eppley.m.2020.tar• 2020 data: ~   49 MB of compressed data
eppley.m.2021.tar• 2021 data: ~   48 MB of compressed data
eppley.m.2022.tar• 2022 data: ~   44 MB of compressed data
eppley.m.2023.tar• 2023 data: ~   48 MB of compressed data
eppley.m.2024.tar• 2024 data: ~     5 MB of compressed data

hdf file naming convention

eppley.yyyyddd.hdf.gz

eppley = net primary production (units of mg C / m**2 / day) based on the eppley variation of the vgpm algorithm
yyyy = year
ddd= day of year of the start of each monthly file
hdf = file type
gz = compressed with gzip (uncompress with gunzip)

The hdf files have metadata contained within them, which can be examined, for example, with program "ncdump".

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

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

 20022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024
January----- 2003001 2004001 2005001 2006001 2007001 2008001 2009001 2010001 2011001 2012001 2013001 2014001 2015001 2016001 2017001 2018001 2019001 2020001 2021001 2022001 2023001 2024001
February----- 2003032 2004032 2005032 2006032 2007032 2008032 2009032 2010032 2011032 2012032 2013032 2014032 2015032 2016032 2017032 2018032 2019032 2020032 2021032 2022032 2023032-----
March----- 2003060 2004061 2005060 2006060 2007060 2008061 2009060 2010060 2011060 2012061 2013060 2014060 2015060 2016061 2017060 2018060 2019060 2020061 2021060 2022060 2023060-----
April----- 2003091 2004092 2005091 2006091 2007091 2008092 2009091 2010091 2011091 2012092 2013091 2014091 2015091 2016092 2017091 2018091 2019091 2020092 2021091----- 2023091-----
May----- 2003121 2004122 2005121 2006121 2007121 2008122 2009121 2010121 2011121 2012122 2013121 2014121 2015121 2016122 2017121 2018121 2019121 2020122 2021121 2022121 2023121-----
June----- 2003152 2004153 2005152 2006152 2007152 2008153 2009152 2010152 2011152 2012153 2013152 2014152 2015152 2016153 2017152 2018152 2019152 2020153 2021152 2022152 2023152-----
July 2002182 2003182 2004183 2005182 2006182 2007182 2008183 2009182 2010182 2011182 2012183 2013182 2014182 2015182 2016183 2017182 2018182 2019182 2020183 2021182 2022182 2023182-----
August 2002213 2003213 2004214 2005213 2006213 2007213 2008214 2009213 2010213 2011213 2012214 2013213 2014213 2015213 2016214 2017213 2018213 2019213 2020214 2021213 2022213 2023213-----
September 2002244 2003244 2004245 2005244 2006244 2007244 2008245 2009244 2010244 2011244 2012245 2013244 2014244 2015244 2016245 2017244 2018244 2019244 2020245 2021244 2022244 2023244-----
October 2002274 2003274 2004275 2005274 2006274 2007274 2008275 2009274 2010274 2011274 2012275 2013274 2014274 2015274 2016275 2017274 2018274 2019274 2020275 2021274 2022274 2023274-----
November 2002305 2003305 2004306 2005305 2006305 2007305 2008306 2009305 2010305 2011305 2012306 2013305 2014305 2015305 2016306 2017305 2018305 2019305 2020306 2021305 2022305 2023305-----
December 2002335 2003335 2004336 2005335 2006335 2007335 2008336 2009335 2010335 2011335 2012336 2013335 2014335 2015335 2016336 2017335 2018335 2019335 2020336 2021335 2022335 2023335-----


Last modified: 26 July 2024
by:  Toby Westberry

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