SONEX Oct 7 - Nov 12, 1997

Official SONEX homepage

Brief description

The Subsonic Assessment: Ozone and Nitrogen Oxide Experiment (SONEX) project took place in October - November 1997 and was based from three airports: Bangor, Maine, Shannon, Ireland, and Azores, Portugal. SONEX was conducted to understand a variety of NOx sources including the current subsonic aircraft fleet in the North Atlantic, with and without convection. To improve the models and our understanding, Photochemistry was collected to determine the impact of subsonic aircraft emissions on Tropospheric NOx and Ozone budgets.

Special remarks concerning ETHmeg database content

5-min merge files downloaded from FTP-server at NASA. One merge file is available per SONEX flight. Here you'll find information about merge files and parameters.

• O3, CO, OH, HO2, H2O2, H2O, NO, NOy, HNO3 (2 diff. meas.), NOy, PAN, acetone, ethane, ethene, T, dew/frost point T, JNO2.

Only minor problems with strongly neg. concentrations, which had to be eliminated. These were possibly during the data merging.

Overview of measurement techniques and uncertainties
(as stated in file headers)

References

Special section in JGR, Vol. 105, No. D3, 2000.
For further references see SONEX homepage