Intercomparison of fast airborne ozone instruments to measure eddy covariance fluxes: spatial variability in deposition at the ocean surface and evidence for cloud processing
Dept. ASF, Institute of Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
Alessandro Franchin
National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, USA
National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, USA
Christopher Webster
National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, USA
Andreas Zahn
Dept. ASF, Institute of Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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.
The ozone sink into oceans and marine clouds is seldom studied and highly uncertain....