Net Ecosystem Exchange of CO2 and H2O in Sagebrush Steppe

This project focuses on year-round environmental drivers of carbon and water cycling in sagebrush steppe. Our research to date has shown that spring moisture availability is a key regulator of C uptake during the growth season (Kwon et al. 2008). Current efforts are targeted at winter processes, in collaboration with Dr. Chris Hiemstra at Colorado State University. Eddy covariance towers located near Saratoga, Wyoming, and Walden, Colorado, provide contrasting conditions of shrub and snow cover. Spatial variation in soil respiration and sagebrush regulation of water losses are being studied in detail.

Saratoga in Spring

Walden view in Spring

Saratoga in Winter

Walden in Winter

Soil Respiration at Saratoga, April 2008

Soil respiration at Walden, February 2008