United States Department of Agriculture
Natural Resources Conservation Service		 Air Quality and
Atmospheric Change		 Go to Accessibility Information
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Dr. Greg Johnson

Leader, Air Quality & Atmospheric Change Team

NRCS-National Air Quality and Atmospheric Change Team
1201 NE Lloyd Blvd, Suite 1000
Portland, Oregon 97232-1202
Phone: 503-273-2424
Fax: 503-273-2401
Email: greg.johnson@por.usda.gov

Education
Year Degree/Institution
1991 PhD Atmospheric Science / North Carolina State Univ, Raleigh, NC
1979 M.S. Atmospheric Science / Univ. Wisconsin, Madison, WI
1977 B.S. Atmospheric Science / Oregon State Univ, Corvalis, OR

Background
Years Position
2004-Present Leader, NRCS Air Quality and Atmospheric Change Team, Portland, OR
1997-2004 Applied Climatologist, USDA-NRCS, National Water and Climate Center, Portland, OR
1991-1997 Research Meteorologist, USDA-ARS, Northwest Watershed Research Center, Boise, ID
1979-1991 Agricultural Meteorologist, Extension Service, Horticulture Dept., NC State Univ., Raleigh, NC

Publications

Hanson, C.L, F.B. Pierson, G.L. Johnson, 2004: Dual-gauge system for measuring precipitation: Historical development and use. ASCE J. Hydrologic Engineering, Sept/Oct., pp. 350-359.

Harmel, R.D., C.W. Richardson, G.L. Johnson, 2002: Evaluating the adequacy of simulating maximum and minimum daily air temperature with the normal distribution. J. Appl. Meteor., 41, 744-753.

Daly, C., W.P. Gibson, G.H. Taylor, G.L. Johnson and P.A. Pasteris, 2002: A knowledge-based approach to the statistical mapping of climate. Climate Research, 22, 99-113.

Daly, C., G.H. Taylor, T.W. Parzybok, G.L. Johnson and P.A. Pasteris. 2000. High-quality spatial climate data sets for the United States. Trans. ASAE., 43(6), 1957-1962.

Johnson, G.L., C. Daly, G.H. Taylor and C.L. Hanson. 2000. Spatial variability and interpolation of stochastic weather simulation model parameters. J. Appl. Meteor., 39, 778-796.

Hanson, C.L., G.L. Johnson and A. Rango. 1999. Comparison of precipitation catch between nine measurement systems. J. Hydrologic Engr., 4, 70-75.

Johnson, G.L., C.L. Hanson, S.P. Hardegree and E.B. Ballard, 1996: Stochastic weather simulation: Overview and analysis of two commonly used models. J. Appl. Meteor., 35, 1878-1896.

Johnson, G.L. and C.L. Hanson, 1995: Topographic and atmospheric influences on precipitation variability over a mountainous watershed. J. Appl. Meteor. 34, 68-87.

Johnson, G.L., J.M. Davis, T.R. Karl, A.L. McNab, K.P. Gallo, J.D. Tarpley and P. Bloomfield, 1994: Estimating urban temperature bias using polar orbiting satellite data. J. Appl. Meteor., 33, 358-369.

Garen, D.C., G.L. Johnson and C.L. Hanson, 1994: Mean areal precipitation for daily hydrologic modeling in mountainous regions. Water Resources Bull., 30, 481-491.

Bailey, J.E., G.L. Johnson and S.J. Toth, Jr., 1994: Evolution of a weather-based peanut leaf spot spray advisory in North Carolina. Plant Disease, 78, 530-535.