Monthly NASA-CASA NPP and NEP output files from 2001-2004 US 8km runs cited in Potter et al. (2007) Earth Interactions paper.

Potter, C., S. Klooster, A. Huete, and V. Genovese, 2007, Terrestrial carbon sinks for the United States predicted from MODIS satellite data and ecosystem modeling, Earth Interactions, 11: 1-21. 

Point of contact: Chris Potter


CASA output naming convention:
NPPa_00.2004.v11.00420.d1ref
NEP_00.2004.v11.00420.d1ref

NPPa is net primary production in units of g C per m^-2 per month (general range 0-1500)
NEP is net ecosystem production in units of g C per m^-2 per month (general range: -300 to 300)

_00 to _11 refer to the month (Jan to Dec)
.2001 to .2004 refer to the year
.v11.00420.d1ref is merely our internal version control numbering.

All files are binary format.  Unsigned int for NPPa and signed int for NEP data.

File dimensions:  342 rows and 605 columns.

Projection is MODIS 8km, equal area. (incorrect, please see updates and revisions below)


November 20, 2008
-----------------
Updates and Revisions to the above original content.
Provided by Michele Thornton, ORNL, based on communications from Chris Potter

Monthly NASA-CASA NPP and NEP

Projection:  Interrupted Goode Homolosine
Datum:  Sphere of Radius 6370997
Upper Left X (center):  -13250980.0
Upper Left Y (center):  5462420.5
Number rows: 342
Number cols: 605
Cell size:  8 km

NPP data is 16 bit unsigned integer
NEP data is 16 bit signed integer

There is a mulitplier of *100 on both the NPP and NPP.  Divide by 100 to get the proper gC/m^2/month ranges.

It may be necessary to byte-swap the data to get the proper ranges.


In addition, the following land/water/urban mask and readme file used in the NASA-CASA processing was provided by Vanessa Genovese
as requested by Chris Potter.
usmask3.bin
usmask3.readme