CONTENTS 



INTRODUCTION 1 



BACKGROUND INFORMATION 2 



INSTRUMENTATION 2 



SOLAR RADIATION 4 



AIR TEMPERATURE 7 



SOIL TEMPERATURE 10 



RELATIVE HUMIDITY 16 



WIND 18 



PRECIPITATION 19 



SOIL MOISTURE 20 



COMPARISONS WITH WEATHER BUREAU STATIONS . . 23 

 LITERATURE CITED 25 



ABSTRACT 



Weather data collected on mountain grasslands during five growing 

 seasons are summarized. These data are from four stations on opposing 

 exposures (southwest and northeast) at different elevations (7,100 and 

 8,200 feet). Tabular and graphic data presented are for the station on 

 the 7,100-foot southwest exposure only. These data include information 

 on: solar radiation, wind, precipitation, air temperature, and relative 

 humidity; exposed and shaded soil surface temperatures, and soil tem- 

 peratures and moisture trends at three depths. Summaries include: 

 means, ranges, extremes, and durations. Differences in weather on the 

 two exposures and at the two elevations are discussed. Air temperature 

 and precipitation records are compared with those obtained from two 

 U.S. Weather Bureau stations located in nearby valleys. 



