Preface (A. Bytnerowicz, M.J. Arbaugh, R. Alonso). Section I: Ozone and its effects on Sierra Nevada ecosystems. 1. Geology, climate and vegetation of the Sierra Nevada and the mixed-conifer zone: An introduction to the ecosystem (R.A. Minnich, P.E. Padgett). 2. Historical perspectives on ambient ozone and its effects on the Sierra Nevada (J.J. Carroll, P.R. Miller, J. Pronos). 3. The physiological basis of ozone injury assessment attributes in Sierran conifers (N.E. Grulke). 4. Ozone uptake by ponderosa pine in the Sierra Nevada - A measurement perspective (A.H. Goldstein, M.R. Kurpius, J.A. Panek). 5. Effects of ozone, nitrogen deposition, and other stressors on montane ecosystems in the Sierra Nevada (M.E. Fenn, M.A. Poth et al.). Section II: Analysis of spatial patterns of urban transported ozone in the Sierra Nevada. 6. Introduction to a regional passive ozone sampler network in the Sierra Nevada (M.J. Arbaugh, A. Bytnerowicz). 7. Use of auxiliary data for spatial interpolation of surface ozone patterns (E.H. Lee). 8. Use of nonparametric local regression to estimate surface ozone patterns over space and time (H.K. Preisler, S. Schilling). 9. Use of geostatistics to estimate surface ozone patterns (W. Fraczek, A. Bytnerowicz, M.J. Arbaugh). 10. Ambient ozone patterns and effects over the Sierra Nevada: Synthesis and implications for future research (M.J. Arbaugh, A. Bytnerowicz). Section III: Research and development needs for the Sierra Nevada. 11. Methodological needs and perspectives for monitoring ambient air pollution and regional haze: Tools for understanding forest responses (A. Bytnerowicz, P.E. Padgett, M.J. Arbaugh). 12. Towards an air pollution effects monitoring system for the Sierra Nevada (E. Plymale, M.J. Arbaugh et al.). 13. Formulation and application of regional air quality modeling for integrated assessments of urban and wildland pollution (G. Tonnesen, Z. Wang et al.). 14. The need for spatially and functionally integrated models of ozone deposition to Sierra Nevada forests (J.A. Panek, D.D. Baldocchi, A.H. Goldstein). 15. Managing air pollution affected forests in the Sierra Nevada (T. Procter, S. Ahuja, F.M. McCorrison). Section IV: International perspective of the Sierra Nevada research. 16. Monitoring and modeling of ozone status and effects in the Sierra Nevada: A comparison with studies in North America and Europe (R. Alonso, A. Bytnerowicz).