Intercomparison of fast airborne ozone instruments to measure eddy covariance fluxes: spatial variability in deposition at the ocean surface and evidence for cloud processing

Chiu, Randall; Obersteiner, Florian; Franchin, Alessandro; Campos, Teresa; Bailey, Adriana; Webster, Christopher; Zahn, Andreas; Volkamer, Rainer

doi:https://doi.org/10.5194/amt-17-5731-2024

Articles | Volume 17, issue 19

https://doi.org/10.5194/amt-17-5731-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-17-5731-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 19

Research article

|

30 Sep 2024

Research article |

| 30 Sep 2024

Intercomparison of fast airborne ozone instruments to measure eddy covariance fluxes: spatial variability in deposition at the ocean surface and evidence for cloud processing

Randall Chiu, Florian Obersteiner, Alessandro Franchin, Teresa Campos, Adriana Bailey, Christopher Webster, Andreas Zahn, and Rainer Volkamer

Supplement

https://doi.org/10.5194/amt-17-5731-2024-supplement

Data sets

TI3GER: NONO2O3 Chemiluminescence 1Hz Data and O3 10Hz Data A. Franchin and A. Weinheimer https://doi.org/10.26023/XFNX-PNDQ-PY0A

TI3GER: High Rate (HRT - 25 sps) Navigation, State Parameter, and Microphysics Flight-Level Data NSF/NCAR GV Team https://data.eol.ucar.edu/dataset/618.003

FAIRO-1 Ozone Data F. Obersteiner and A. Zahn https://doi.org/10.26023/S3FA-R52G-ZS11

FAIRO-2 Ozone Data F. Obersteiner and A. Zahn https://doi.org/10.26023/6EVD-9WZR-1V0V

Model code and software

AirChem/FluxToolbox: Collections of scripts for eddy covariance flux calculations (both traditional and wavelet-based) G. M. Wolfe https://github.com/AirChem/FluxToolbox

Short summary

The ozone sink into oceans and marine clouds is seldom studied and highly uncertain. Calculations suggest O₃ destruction at aqueous surfaces (ocean, droplets) may be strongly accelerated, but field evidence is missing. Here we compare three fast airborne O₃ instruments to measure eddy covariance fluxes of O₃ over the remote ocean, in clear and cloudy air. We find O₃ fluxes below clouds are consistently directed into clouds, while O₃ fluxes into oceans are much smaller and spatially variable.