ABSTRACT
Source: Pollack, S. L. and Lynch, L. (1991), ‘Provisions of the Food, Agriculture, Conservation, and Trade Act of 1990’, USDA, ERS, AIB No. 624.
6 J. K. Lewandrowski and R. J. Brazee
4 The prices paid by farmers for water from federal projects in the Western United States are set by long-term contracts and do not change from year to year. The prices described here refer to these contract prices. 5 We do not discuss uncertainties related to the timing and speed of climate change. Most studies conclude, or assume, that the effects of climate change will appear gradually starting in 20 to 50 years. Another possibility is that the environment has some threshold for greenhouse gases and once this level is passed the effects will show up quite rapidly. 6 Commonly cited GCMs include the GISS model (Goddard Institute for Space Studies), the GFDL model (Geophysical Fluid Dynamics Laboratory), the OSU model (Oregon State University), the NCAR model (National Center for Atmospheric Research), and the UKMO model (United Kingdom Meteorological Office).
