Data resources for summarizing annual Net Primary Productivity (NPP) data over the past 2-3 Decades 1. The website of University of Montana’s Numerical Terradynamic Simulation Group provides annual NPP data for the years 2000 - 2012: http://www.ntsg.umt.edu/project/mod17 There are also summaries for change in NPP over the last decade: ftp://ftp.ntsg.umt.edu/pub/MODIS/NTSG_Products/MOD17/Trend_2km_GEOTIFF/ 2. The Global Land Cover Facility’s Global Production Efficiency Model ( GLOPEM): these are annual NPP data sets that cover the years 1981 - 2000. As an example of what can be done with these data sets, here is a 2010 study that calculated NPP changes in high altitude regions of the western U.S.: http://mri.scnatweb.ch/download-document?gid=1115 [...]
