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Quantitative comparison of measured and simulated O4 absorptions for one day with extremely low aerosol load over the tropical Atlantic

MPG-Autoren

Wagner,  Thomas
Satellite Remote Sensing, Max Planck Institute for Chemistry, Max Planck Society;

Dörner,  Steffen
Satellite Remote Sensing, Max Planck Institute for Chemistry, Max Planck Society;

Beirle,  Steffen
Satellite Remote Sensing, Max Planck Institute for Chemistry, Max Planck Society;

Donner,  Sebastian
Satellite Remote Sensing, Max Planck Institute for Chemistry, Max Planck Society;

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Kinne,  Stefan
Tropical Cloud Observations, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

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amt-14-3871-2021.pdf
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Zitation

Wagner, T., Dörner, S., Beirle, S., Donner, S., & Kinne, S. (2021). Quantitative comparison of measured and simulated O4 absorptions for one day with extremely low aerosol load over the tropical Atlantic. Atmospheric Measurement Techniques, 14, 3871-3893. doi:10.5194/amt-14-3871-2021.


Zitierlink: https://hdl.handle.net/21.11116/0000-0008-AC22-0
Zusammenfassung
In this study we compare measured and simulated O4 absorptions for conditions of extremely low aerosol optical depth (between 0.034 to 0.056 at 360 nm) on one day during a ship cruise in the tropical Atlantic. For such conditions, the uncertainties related to imperfect knowledge of aerosol properties don't significantly affect the comparison results. We find that the simulations underestimate the measurements by 15 % to 20 %. Even for simulations without any aerosols the measured O4 absorptions are still systematically higher than the simulation results. The observed discrepancies can not be explained by uncertainties of the measurements and simulations and thus indicate a fundamental inconsistency between simulations and measurements.