Auxiliary material for Paper 2010JG001621 Nitrogen effect on carbon-water coupling in forests, grasslands, and shrublands in the arid western United States Benjamin Felzer Earth and Environmental Sciences Department, Lehigh University, Bethlehem, Pennsylvania, USA Timothy Cronin Joint Program on the Science and Policy of Global Change Massachusetts, Institute of Technology, Cambridge, Massachusetts, USA Jerry Melillo and David Kicklighter Ecosystems Center, Marine Biological Laboratory, Woods Hole, Massachusetts, USA C. Adam Schlosser Joint Program on the Science and Policy of Global Change Massachusetts, Institute of Technology, Cambridge, Massachusetts, USA Shree R. S. Dangal Earth and Environmental Sciences Department, Lehigh University, Bethlehem, Pennsylvania, USA Felzer, B., T. Cronin, J. Melillo, D. Kicklighter, C. A. Schlosser, and S. R. S. Dangal (2011), Nitrogen effect on carbon-water coupling in forests, grasslands, and shrublands in the arid western United States, J. Geophys. Res., 116, G03023, doi:10.1029/2010JG001621. Introduction The auxiliary material includes details about the structure of TEM-Hydro. The Model Calibration section explains how the model is calibrated, includes Figures S2-S4 (detailed carbon, nitrogen, and water cycle diagrams), and Tables S1, S2a, S2b, and S3, which include model calibration values, parameters, and target values. The remaining sections of Text S1 include detailed mathematical descriptions of changes to the TEM-Hydro since the Felzer et al. (2009) version. Many of these changes were made to address issues specific to grass and shrub biomes. 1. 2010jg001621-txts01.doc Text S1. Model calibration. 2. 2010jg001621-fs01.eps Figure S1. Moisture stress functions (fh2o, fh2o’) for different values of wfrac and lsc/lscmin=1 and lsc/lscmin=4. 3. 2010jg001621-fs02.eps Figure S2. Moisture function for heterotrophic respiration for several different soil porosities. 4. 2010jg001621-fs03.pdf Figure S3. TEM-Hydro carbon cycle is further divided between four vegetation structural pools (fine roots, leaves, sapwood, and heartwood), and a labile pool for storage. 5. 2010jg001621-fs04.pdf Figure S4. TEM-Hydro nitrogen cycle is further divided between four vegetation structural pools (fine roots, leaves, sapwood, and heartwood), and a labile pool for storage. 6. 2010jg001621-fs05.pdf Figure S5. Soil evaporation and plant transpiration are determined using a simple bucket model with the [Shuttleworth and Wallace, 1985] approach to calculating ET. 7. 2010jg001621-ts01.doc Table S1 Calibration values for each biomes. 8. 2010jg001621-ts02a.doc TableASa. Biome-dependent parameters used in TEM- Hydro. 9. 2010jg001621-ts02b.doc Table S2b. Biome-independent parameters used in TEM- Hydro. 10. 2010jg001621-ts03.doc TableS3 Biome-dependent target values used for calibrating TEM-Hydro. 11. 2010jg001621-ts04.doc Table S4. River basins used to model check TEM-Hydro; related to Figure 12 of the text.