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NPP Temperate Forest: OTTER Project Sites, Oregon, USA, 1989-1991, R1

Data Set Overview

Data setNPP Temperate Forest: OTTER Project Sites, Oregon, USA, 1989-1991, R1
Release date2013-09-04
ProjectNet Primary Productivity (NPP)
Time Period1989-01-01 to 1991-12-31


This data set provides net primary productivity (NPP) estimates and associated field measurements for six sites located along the 250-km, west-east transect of the Oregon Transect Ecosystem Research Project (OTTER) in the Pacific Northwest. Leaf area indices, biomass, and NPP vary about 10-fold across the OTTER transect. Leaf area index (LAI) ranges from 0.4 m2/m2 at the Juniper/Sisters site to 8.6 m2/m2 at the Scio western Cascade site. Total NPP follows a similar trend with the Juniper/Sisters site having the lowest NPP value (300 g/m2/yr) and the Scio site having the highest (2,250-2,570 g/m2/yr). Total tree biomass across the transect ranges from to 1,080 g/m2 at Juniper/Sisters to 71,080 g/m2 at Cascade Head. Vegetation intercepts 22% to 99.5% of incident photosynthetically active radiation along the transect. There is one data file (.csv format) with this data set. Revision Notes: Only the documentation for this data set has been modified. The data files have been checked for accuracy and are identical to those originally published in 1999.


Data set reference document


Waring, R.H., B.E. Law, and B. Bond. 2013. NPP Temperate Forest: OTTER Project Sites, Oregon, USA, 1989-1991, R1. ORNL DAAC, Oak Ridge, Tennessee, USA.
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Net Primary Productivity (NPP): NPP (net primary production) data from existing field measurements are being compiled for approximately 100 study sites covering several major world ecosystem types. These data are used by global change modelers to develop and validate models of vegetation-soil-atmosphere interactions within the global carbon cycle and to help calibrate remote sensing of vegetation worldwide

Project data set list for Net Primary Productivity (NPP).

Companion Files

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  • NPP_OTTER.pdf

Data Files

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Data File (Granule)File SizeDates
ott_npp.txt 14.7 KB 1989-01-01 - 1991-12-31

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