The annual course of precipitation over much of the United States: observed versus GCM simulation

General Circulation Models (GCMs) may be useful in estimating the ecological impacts of global climatic change. We analyzed seasonal weather patterns over the conterminous United States and determined that regional patterns of rainfall seasonality appear to control the distributions of the Nation's major biomes. These regional patterns were compared to the output from three GCMs for validation. The models appear to simulate the appropriate seasonal climates in the northern tier of states. However, the spatial extent of these regions is distorted. None of the models accurately portrayed rainfall seasonalities in the southern tier of states, where biomes are primarily influenced by the Bermuda High

A preliminary classification of the plant communities of northeastern Montana /

199

Plant communities of the Kevin Rim, Toole County, Montana : preliminary survey results /

199

Plant community survey of the Buck Demone Ranch, Fergus County, Montana /

199

Grassland and shrubland communities on USDI Bureau of Land Management lands in Montana /

199

Matrix of plant community/association types by state and global rank and occurrence by Bureau of Land Management resource area : with forward explaining compilation and use of matrix /

199

Biodiversity significance of vegetation types on the Wallace Ranch, Montana /

199