The purpose of the Oregon Transect Ecosystem Research (OTTER) Project was to estimate major fluxes of carbon, nitrogen, and water in forest ecosystems using an ecosystem-process model driven by remotely sensed data. The project was conducted from 1990 to 1991. The DAAC's data holdings include background data from 1989.

OTTER data sets include Canopy Chemistry, Meteorology, Field Sunphotometer, Airborne Sunphotometer, and Timber Measurements. They were transferred to the ORNL DAAC from the Ames Research Center node of the Pilot Land Data System (PLDS).

See the OTTER Campaign Document.

Continue your exploration of the OTTER Project using the following on-line resources:

• OTTER Data Set Documents
• OTTER Bibliography
• NPP for OTTER Project Sites

Find and order data sets:

• See list of data sets
• Browse by attributes

Obtain project CD-ROMs:

• Order CD-ROMs on-line
• Make your own CD-ROMs

Download data sets directly:

• FTP site

Study sites included a coastal forest of western hemlock, sitka spruce, and red alder in a recent clear-cut; a mid-elevation forest of mature Douglas fir in the lower Cascades and a fertilized plot nearby; and an inland forest of ponderosa pine on the drier eastern slope of the Cascades with a fertilized forest nearby. More ...