NIM/ECOR/M1 - Effects on ECOR CO2 Flux and Concentration By Aircraft

Aircraft landings, departures, and running aircraft on the airport pad
were found to produce large spikes in the half hourly CO2 flux and small spikes in CO2 
concentration on many days during the entire deployment of the AMF at NIM.  This influence 
was found on 40% of the days in March and April 2006 and sometimes for multiple periods in 
a day; this was typical of  the year of data.  The spikes range from only several 
micromoles s-1 m-2 to one hundred or more for flux (a typical spike was in the twenties) and 
near zero to 1.0 mmoles m-3 for CO2 concentration (typically around 0.15).

The aircraft influence was caused by persistent easterly winds; the airport
terminal pad and the nearest part of the runway were almost directly to the
east of the ECOR location.

Occasionally an influence on water vapor density was detected, but this was fairly rare 
and usually of very small magnitude.

null
same half hour.

• Covariance uc(cvar_uc)
• Covariance tc(cvar_tc)
• mean co2 concentration (c)(mean_c)
• Covariance wc(cvar_wc)
• variance of c(var_c)
• covariance vc(cvar_vc)
• rotated covariance uc(cvar_rot_uc)
• Rotated covariance vc(cvar_rot_vc)
• Rotated covariance wc(cvar_rot_wc)
• CO2 flux(fc)