March 2, 2011 – Successful CO2 profile experiment
We have just completed 48 hrs of measurements that suggests a strong gradient in atmospheric CO2 concentration with altitude (up to 30 meters above street level) during the daytime hours. This concentration gradient largely disappears at night. We have only begun to explore these patterns and will combine our preliminary results with atmospheric data to determine how wind velocity, turbulence, and emissions from cars and buildings influence CO2 concentrations in space and time. Our thanks to the folks at Picarro for loaning us the equipment for this study. Some preliminary data: 
