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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 8day HDF files from VIIRS R2022 Data

note: data updated 10.18.2023 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 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 the individual 8day files at the end of this page.

Annual Tar Files

eppley.v.2012.tar• 2012 data: ~ 178 MB of compressed data
eppley.v.2013.tar• 2013 data: ~ 178 MB of compressed data
eppley.v.2014.tar• 2014 data: ~ 177 MB of compressed data
eppley.v.2015.tar• 2015 data: ~ 178 MB of compressed data
eppley.v.2016.tar• 2016 data: ~ 179 MB of compressed data
eppley.v.2017.tar• 2017 data: ~ 179 MB of compressed data
eppley.v.2018.tar• 2018 data: ~ 179 MB of compressed data
eppley.v.2019.tar• 2019 data: ~ 179 MB of compressed data
eppley.v.2020.tar• 2020 data: ~ 179 MB of compressed data
eppley.v.2021.tar• 2021 data: ~ 179 MB of compressed data
eppley.v.2022.tar• 2022 data: ~ 172 MB of compressed data
eppley.v.2023.tar• 2023 data: ~ 180 MB of compressed data
eppley.v.2024.tar• 2024 data: ~   33 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 8ay 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.

8day Files

starting day2012201320142015201620172018201920202021202220232024
001 2012001 2013001 2014001 2015001 2016001 2017001 2018001 2019001 2020001 2021001 2022001 2023001 2024001
009 2012009 2013009 2014009 2015009 2016009 2017009 2018009 2019009 2020009 2021009 2022009 2023009 2024009
017 2012017 2013017 2014017 2015017 2016017 2017017 2018017 2019017 2020017 2021017 2022017 2023017 2024017
025 2012025 2013025 2014025 2015025 2016025 2017025 2018025 2019025 2020025 2021025 2022025 2023025 2024025
033 2012033 2013033 2014033 2015033 2016033 2017033 2018033 2019033 2020033 2021033 2022033 2023033 2024033
041 2012041 2013041 2014041 2015041 2016041 2017041 2018041 2019041 2020041 2021041 2022041 2023041 2024041
049 2012049 2013049 2014049 2015049 2016049 2017049 2018049 2019049 2020049 2021049 2022049 2023049 2024049
057 2012057 2013057 2014057 2015057 2016057 2017057 2018057 2019057 2020057 2021057 2022057 2023057 2024057
065 2012065 2013065 2014065 2015065 2016065 2017065 2018065 2019065 2020065 2021065 2022065 2023065-----
073 2012073 2013073 2014073 2015073 2016073 2017073 2018073 2019073 2020073 2021073 2022073 2023073-----
081 2012081 2013081 2014081 2015081 2016081 2017081 2018081 2019081 2020081 2021081 2022081 2023081-----
089 2012089 2013089 2014089 2015089 2016089 2017089 2018089 2019089 2020089 2021089 2022089 2023089-----
097 2012097 2013097 2014097 2015097 2016097 2017097 2018097 2019097 2020097 2021097 2022097 2023097-----
105 2012105 2013105 2014105 2015105 2016105 2017105 2018105 2019105 2020105 2021105 2022105 2023105-----
113 2012113 2013113 2014113 2015113 2016113 2017113 2018113 2019113 2020113 2021113 2022113 2023113-----
121 2012121 2013121 2014121 2015121 2016121 2017121 2018121 2019121 2020121 2021121 2022121 2023121-----
129 2012129 2013129 2014129 2015129 2016129 2017129 2018129 2019129 2020129 2021129 2022129 2023129-----
137 2012137 2013137 2014137 2015137 2016137 2017137 2018137 2019137 2020137 2021137 2022137 2023137-----
145 2012145 2013145 2014145 2015145 2016145 2017145 2018145 2019145 2020145 2021145 2022145 2023145-----
153 2012153 2013153 2014153 2015153 2016153 2017153 2018153 2019153 2020153 2021153 2022153 2023153-----
161 2012161 2013161 2014161 2015161 2016161 2017161 2018161 2019161 2020161 2021161 2022161 2023161-----
169 2012169 2013169 2014169 2015169 2016169 2017169 2018169 2019169 2020169 2021169 2022169 2023169-----
177 2012177 2013177 2014177 2015177 2016177 2017177 2018177 2019177 2020177 2021177 2022177 2023177-----
185 2012185 2013185 2014185 2015185 2016185 2017185 2018185 2019185 2020185 2021185 2022185 2023185-----
193 2012193 2013193 2014193 2015193 2016193 2017193 2018193 2019193 2020193 2021193 2022193 2023193-----
201 2012201 2013201 2014201 2015201 2016201 2017201 2018201 2019201 2020201 2021201 2022201 2023201-----
209 2012209 2013209 2014209 2015209 2016209 2017209 2018209 2019209 2020209 2021209----- 2023209-----
217 2012217 2013217 2014217 2015217 2016217 2017217 2018217 2019217 2020217 2021217----- 2023217-----
225 2012225 2013225 2014225 2015225 2016225 2017225 2018225 2019225 2020225 2021225 2022225 2023225-----
233 2012233 2013233 2014233 2015233 2016233 2017233 2018233 2019233 2020233 2021233 2022233 2023233-----
241 2012241 2013241 2014241 2015241 2016241 2017241 2018241 2019241 2020241 2021241 2022241 2023241-----
249 2012249 2013249 2014249 2015249 2016249 2017249 2018249 2019249 2020249 2021249 2022249 2023249-----
257 2012257 2013257 2014257 2015257 2016257 2017257 2018257 2019257 2020257 2021257 2022257 2023257-----
265 2012265 2013265 2014265 2015265 2016265 2017265 2018265 2019265 2020265 2021265 2022265 2023265-----
273 2012273 2013273 2014273 2015273 2016273 2017273 2018273 2019273 2020273 2021273 2022273 2023273-----
281 2012281 2013281 2014281 2015281 2016281 2017281 2018281 2019281 2020281 2021281 2022281 2023281-----
289 2012289 2013289 2014289 2015289 2016289 2017289 2018289 2019289 2020289 2021289 2022289 2023289-----
297 2012297 2013297 2014297 2015297 2016297 2017297 2018297 2019297 2020297 2021297 2022297 2023297-----
305 2012305 2013305 2014305 2015305 2016305 2017305 2018305 2019305 2020305 2021305 2022305 2023305-----
313 2012313 2013313 2014313 2015313 2016313 2017313 2018313 2019313 2020313 2021313 2022313 2023313-----
321 2012321 2013321 2014321 2015321 2016321 2017321 2018321 2019321 2020321 2021321 2022321 2023321-----
329 2012329 2013329 2014329 2015329 2016329 2017329 2018329 2019329 2020329 2021329 2022329 2023329-----
337 2012337 2013337 2014337 2015337 2016337 2017337 2018337 2019337 2020337 2021337 2022337 2023337-----
345 2012345 2013345 2014345 2015345 2016345 2017345 2018345 2019345 2020345 2021345 2022345 2023345-----
353 2012353 2013353 2014353 2015353 2016353 2017353 2018353 2019353 2020353 2021353 2022353 2023353-----
361 2012361 2013361 2014361 2015361 2016361 2017361 2018361 2019361 2020361 2021361 2022361 2023361-----


Last modified: 26 July 2024
by:  Toby Westberry

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