Tabulation of N₂, O₂, CO₂, and He concentrations in soil gases collected on a regular basis for 11 months from a site at Tucson, Arizona

Abstract

Concentrations of N2 , O2 , CO2 , and He were measured in soil gases collected daily for 11 months from 0.6-m depth at a site at Tucson, Arizona. Soil and air temperatures, percent relative humidity, barometric pressure, and rainfall were also monitored. Sampling and analysis of the soil gases are described and measurements of gas concentrations and meteorological parameters are listed. CO2 concentrations were higher in the summer than in the winter, whereas O2 concentrations were higher in winter than in summer. He concentrations were slightly higher in winter than in summer. N2 concentrations did not appear to be related to any particular meteorology parameter.