The eddy covariance technique is the most direct meteorological method to measure mass and energy exchange between the land surface and the atmosphere. This technique has been used to measure CO₂ and energy fluxes in hundreds of sites around the world. There is basically two types of gas analyzers used for eddy covariance measurements: open-path and closed-path analyzers. There is growing evidence that biases between flux measurements obtained from these two types of sensors can be caused by spectroscopy effects, i.e. the strength of CO₂ absorption line is affected by the air temperature. The objective of this study was to evaluate the effect of spectroscopy effects on eddy covariance measurements. Three eddy covariance systems were set up at the Kansas State University football stadium parking lot. This parking provided sufficient fetch for eddy covariance measurements and small CO₂ emissions necessary to evaluate the effect of spectral corrections on the EC measurements. Fluxes measurements were taken using two open-path analyzers (LI7500RS, Licor, Lincoln, NE and IRGASON, Campbell Sci., Logan UT) and a closed-path gas analyzer (EC115, Campbell Sci). The results show large differences between open-path analyzers and the closed-path system when fluxes were not corrected for density effects. These differences were reduced once the density corrections were applied by a small bias still persisted after these corrections. The application of spectroscopy corrections using high frequency temperature measurements improved the agreement between the EC115 and the IRGASON, providing additional evidence that spectroscopy effects should be taken into account in eddy covariance flux calculations.