Bill Massman			240 West Prospect Ft. Collins, CO 80526 Phone: (970) 498-1296 FAX: (970) 498-1212 wmassman@fs.fed.us
	Atmospheric Scientist and Forest Micrometeorologist
	Conducts research to quantify atmospheric-biospheric interactions, including the use of eddy covariance technology to study the exchange of trace gases (carbon dioxide, water, ozone) between the atmosphere and the earth's surface (vegetation, soil, and snow).

Educational Background

Ph.D., University of Wisconsin, Madison, 1978, Meteorology
M.S.., University of Wisconsin, Madison, 1973, Meteorology
M.S.., University of Wisconsin, Madison, 1970, Physics
B.S., University of Missouri, Columbia, 1969, Physics

Professional Experience

1986 – present. Atmospheric Scientist and Forest Micrometeorologist, USDA Forest Service, Rocky Mountain Research Station

1985- 1986, National Research Council Senior Postdoctoral Fellow, NASA/Goddard Space Flight Center, Greenbelt, MD

1982-1985, Assistant Scientist/Senior Systems Analyst, Applied Research Corporation, Landover, MD

Selected Recent Publications 

Impacts of Wildfire on Soils

Massman, W.J.; Frank, J.M. 2005. The effect of a controlled burn on the thermophysical properties of a dry soil using a new model of soil heat flow and a new high temperature heat flux sensor. International Journal of Wildland Fire. 13: 427-442.

Massman, W.J.; Frank, J.M.; Shepperd, W.D.; Platten, M.J. 2003. In situ soil temperature and heat flux measurements during controlled surface burns at a southern Colorado forest site. In: Omi, P.N.; Joyce, L.A., tech. eds. Fire, fuel treatments, and ecological restoration: Conference proceedings; 2002 April 16-18; Fort Collins, CO. Proc. RMRS-P-29. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station: 69-87.

Eddy Covariance

Lee, X.; Massman, W.; Law, B. 2004. Handbook of micrometeorology: a guide for surface flux measurement and analysis. Dordrecht, The Netherlands: Kluwer Academic Publishers. 250 p.

Massman, W.; Clement, R. 2004. Unvertainty in eddy covariance flux estimates resulting from spectral attenuation. In: Lee, X.; Massman, W.; Law, B., eds. Handbook of micrometeorology: a guide for surface flux measurement and analysis. Dordrecht, The Netherlands: Kluwer Academic Publishers: 67-99.

Massman, W. 2004. Concerning the measurement of atmospheric trace gas fluxes with open- and closed-path eddy covariance system: the WPL terms and spectral attenuation. In: Lee, X.; Massman, W.; Law, B., eds. Handbook of micrometeorology: a guide for surface flux measurement and analysis. Dordrecht, The Netherlands: Kluwer Academic Publishers: 133-160.

Massman, W.J.; Lee, X. 2002. Eddy covariance flux corrections and uncertainties in long-term studies of carbon and energy exchanges. Agricultural and Forest Meteorology. 113: 121-144.

Massman, W.J. 2000. A simple method for estimating frequency response corrections for eddy covariance systems. Agricultural and Forest Meteorology. 104: 185-198.

Massman, W.J. 1991. The attenuation of concentration fluctuations in turbulent flow through a tube. Journal of Geophysical Research. 96: 15,269-15,273.

Ozone Deposition

Massman, W.J. 2004. Toward an ozone standard to protect vegetation based on effective dose: a review of deposition resistances and a possible metric. Atmospheric Environment. 38: 2323-2337.

Massman, W.J.; Musselman, R.C.; Lefohn, A.S. 2000. A conceptual ozone dose-response model to develop a standard to protect vegetation. Atmospheric Environment. 34: 745-759.

Massman, W.J.; Pederson, J.; Delany, A.; Grantz, D.; den Hartog, G.; Neumann, H.H.; Oncley, S.P.; Pearson Jr., R.; Shaw, R.H. 1994. An evaluation of the RADM surface module for ozone uptake at three sites in the San Joaquin Valley of California. Journal of Geophysical Research. 99(D4): 8281-8294.

Pressure Pumping

Takle, E.S.; Massman, W.J.; Brandle, J.R.; Schmidt, R.A.; Zhou, X.; Litvina, I.V.; Garcia, R.; Doyle, G.; Rice, C.W. 2004. Influence of high-frequency pressure pumping on carbon dioxide efflux from soil. Agricultural and Forest Meteorology. 124: 193-206.

Takle, E.S.; Brandle, J.R.; Schmidt, R.A.; Garcia, R.; Litvina, I.V.; Massman, W.J.; Zhou, X.; Doyle, G.; Rice, C.W. 2003. High-frequency pressure variations in the vicinity of a surface CO2 flux chamber. Agricultural and Forest Meteorology. 114: 245-250.

Takle, E.S.; Brandle, J.R.; Schmidt, R.A.; Garcia, R.; Litvina, I.V.; Doyle, G.; Zhou, X.; Hou, Q.; Rice, C.W.; Massman, W.J. 2000. Pressure pumping of carbon dioxide from soil. In: 24th Conference on Agricultural and Forest Meteorology; 2000 August 14-18; Davis CA. Boston: American Meteorological Society: 190-191.

Massman, W.J.; Sommerfeld, R.A.; Mosier, A.R.; Zeller, K.F.; Hehn, T.J.; Rochelle, S.G. 1997. A model investigation of turbulence-driven pressure-pumping effects on the rate of diffusion of CO2, N2O, and CH4 through layered snowpacks. Journal of Geophysical Research. 102(Dl5): 18,851-18,863.

Mathematical and Computer Modeling

Su, Z.; Schmugge, T.; Kustas, W.P.; Massman, W.J. 2001. An evaluation of two models for estimation of the roughness height for heat transfer between the land surface and the atmosphere. Journal of Applied Meteorology. 40: 1933-1951.

Massman, W.J. 1999. A model study of kBH-1 for vegetated surfaces using `localized near-field' Lagrangian theory. Journal of Hydrology. 223: 27-43.