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| Grid DAP Data | Sub- set | Table DAP Data | Make A Graph | W M S | Source Data Files | Acces- sible
| Title | Sum- mary | FGDC, ISO, Metadata | Back- ground Info | RSS | E | Institution | Dataset ID | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| data | graph | M | files | public | Unbiased Relative Difference of Net Primary Productivity, VIIRS SNPP vs MODIS Aqua, 9Km, Monthly, 2013-2022, Global |
| F I M | background
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| netpp_psi_snpp_modis |
| Row Type | Variable Name | Attribute Name | Data Type | Value |
|---|---|---|---|---|
| attribute | NC_GLOBAL | acknowledgement | String | This project was supported by the NOAA Office of Satellite Ground Services to CoastWatch West Coast Node via NOAA SWFSC. Support was also provided by NOAA CoastWatch. |
| attribute | NC_GLOBAL | cdm_data_type | String | Grid |
| attribute | NC_GLOBAL | contributor | String | Dale Robinson, Isaac Schroeder |
| attribute | NC_GLOBAL | contributor_role | String | development and project management, production code |
| attribute | NC_GLOBAL | Conventions | String | COARDS, CF-1.6, ACDD-1.3 |
| attribute | NC_GLOBAL | creator_name | String | NOAA CoastWatch West Coast Node |
| attribute | NC_GLOBAL | creator_type | String | institution |
| attribute | NC_GLOBAL | creator_url | String | https://coastwatch.pfeg.noaa.gov/ |
| attribute | NC_GLOBAL | Easternmost_Easting | double | 179.9583 |
| attribute | NC_GLOBAL | geospatial_lat_max | double | 89.95834 |
| attribute | NC_GLOBAL | geospatial_lat_min | double | -89.95834 |
| attribute | NC_GLOBAL | geospatial_lat_units | String | degrees_north |
| attribute | NC_GLOBAL | geospatial_lon_max | double | 179.9583 |
| attribute | NC_GLOBAL | geospatial_lon_min | double | -179.9583 |
| attribute | NC_GLOBAL | geospatial_lon_units | String | degrees_east |
| attribute | NC_GLOBAL | history | String | Tue Apr 9 13:19:40 2024: The unbiased relative difference was calculated from VIIRS-SNPP and MODIS-Aqua primary productivity data using Python code stored at https://github.com/CoastWatch-WestCoast/interim_primary_productivity |
| attribute | NC_GLOBAL | id | String | psi_primprod_snpp_monthly_9km |
| attribute | NC_GLOBAL | infoUrl | String | https://coastwatch.pfeg.noaa.gov/projects/netpp |
| attribute | NC_GLOBAL | institution | String | NOAA/NESDIS/STAR/CoastWatch/West Coast |
| attribute | NC_GLOBAL | instrument | String | VIIRS, MODIS |
| attribute | NC_GLOBAL | keywords | String | calculating, data, latitude, longitude, psi, summation, time |
| attribute | NC_GLOBAL | keywords_vocabulary | String | GCMD Science Keywords |
| attribute | NC_GLOBAL | license | String | The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information. |
| attribute | NC_GLOBAL | map_projection | String | geographic |
| attribute | NC_GLOBAL | naming_authority | String | gov.noaa.pfeg.coastwatch |
| attribute | NC_GLOBAL | NCO | String | netCDF Operators version 4.9.5 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco) |
| attribute | NC_GLOBAL | Northernmost_Northing | double | 89.95834 |
| attribute | NC_GLOBAL | platform | String | NPP, Aqua |
| attribute | NC_GLOBAL | proj4_string | String | +proj=eqc +lat_ts=0 +lat_0=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs +lon_0=0.000000 |
| attribute | NC_GLOBAL | project | String | NOAA CoastWatch Interim Primary Productivity |
| attribute | NC_GLOBAL | publisher_name | String | NOAA/NMFS/SWFSC/ERD, NOAA/NESDIS/STAR/CoastWatch/West Coast Node |
| attribute | NC_GLOBAL | publisher_type | String | group |
| attribute | NC_GLOBAL | publisher_url | String | https://coastwatch.pfeg.noaa.gov |
| attribute | NC_GLOBAL | references | String | Melina et al. Remote Sensing of Environment 203 (2017) 139–151, Behrenfeld and Falkowski. Limnol. Oceanogr. 42 (1997) 1-20. |
| attribute | NC_GLOBAL | source | String | primary productivity measurements based on satellite observations from VIIRS-SNPP and MODIS-Aqua |
| attribute | NC_GLOBAL | sourceUrl | String | (local files) |
| attribute | NC_GLOBAL | Southernmost_Northing | double | -89.95834 |
| attribute | NC_GLOBAL | spatialResolution | String | 9.28 km |
| attribute | NC_GLOBAL | standard_name_vocabulary | String | CF Standard Name Table v70 |
| attribute | NC_GLOBAL | summary | String | The unbiased relative difference (Psi) between primary productivity (netPP) calculated using VIIRS-SNPP and MODIS-Aqua primary productivity data. For each pixel, psi is calculated as netPP(viirs)- netPP(modis) divided by the mean of netPP(viirs) and netPP(modis) as described by Mélina et al. 2017. Primary productivity was calculated as described by Behrenfeld and Falkowski 1997. This dataset contains pixel-by-pixel Psi for the globe for each month between January 2013 to December 2022 at 9 kilometer spatial resolution. |
| attribute | NC_GLOBAL | time_coverage_end | String | 2022-12-16T08:00:00Z |
| attribute | NC_GLOBAL | time_coverage_resolution | String | P1M |
| attribute | NC_GLOBAL | time_coverage_start | String | 2013-01-16T08:00:00Z |
| attribute | NC_GLOBAL | title | String | Unbiased Relative Difference of Net Primary Productivity, VIIRS SNPP vs MODIS Aqua, 9Km, Monthly, 2013-2022, Global |
| attribute | NC_GLOBAL | Westernmost_Easting | double | -179.9583 |
| dimension | time | double | nValues=120, evenlySpaced=false, averageSpacing=30 days 10h 17m 9s | |
| attribute | time | _CoordinateAxisType | String | Time |
| attribute | time | actual_range | double | 1.3583232E9, 1.6711776E9 |
| attribute | time | axis | String | T |
| attribute | time | calendar | String | gregorian |
| attribute | time | ioos_category | String | Time |
| attribute | time | long_name | String | Centered Time |
| attribute | time | standard_name | String | time |
| attribute | time | time_origin | String | 01-JAN-1970 00:00:00 |
| attribute | time | units | String | seconds since 1970-01-01T00:00:00Z |
| dimension | latitude | double | nValues=2160, evenlySpaced=false, averageSpacing=-0.08333333950903196 | |
| attribute | latitude | _CoordinateAxisType | String | Lat |
| attribute | latitude | actual_range | double | -89.95834, 89.95834 |
| attribute | latitude | axis | String | Y |
| attribute | latitude | ioos_category | String | Location |
| attribute | latitude | long_name | String | Latitude |
| attribute | latitude | standard_name | String | latitude |
| attribute | latitude | units | String | degrees_north |
| attribute | latitude | valid_max | double | 90.0 |
| attribute | latitude | valid_min | double | -90.0 |
| dimension | longitude | double | nValues=4320, evenlySpaced=false, averageSpacing=0.0833333178976615 | |
| attribute | longitude | _CoordinateAxisType | String | Lon |
| attribute | longitude | actual_range | double | -179.9583, 179.9583 |
| attribute | longitude | axis | String | X |
| attribute | longitude | ioos_category | String | Location |
| attribute | longitude | long_name | String | Longitude |
| attribute | longitude | standard_name | String | longitude |
| attribute | longitude | units | String | degrees_east |
| variable | psi | float | time, latitude, longitude | |
| attribute | psi | _FillValue | float | -999.0 |
| attribute | psi | colorBarContinuous | String | false |
| attribute | psi | colorBarMaximum | String | 0.4 |
| attribute | psi | colorBarMinimum | String | -0.4 |
| attribute | psi | colorBarNSections | int | 8 |
| attribute | psi | coverage_content_type | String | modelResult |
| attribute | psi | ioos_category | String | Other |
| attribute | psi | long_name | String | Absolute Relative Difference of Net Primary Productivity |
| attribute | psi | missing_value | float | -999.0 |
| attribute | psi | source | String | NOAA CoastWatch West Coast Node |
| attribute | psi | units | String | 1 |
The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.