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Investigation of radiative closure and cloud radiative effects based on ground-based and satellite observations during MOSAiC

Urheber*innen

Barrientos Velasco,  Carola
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Griesche,  Hannes J.
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Hünerbein,  Anja
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Macke,  Andreas
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Seifert,  Patric
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Shupe,  Matthew D.
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Witthuhn,  Jonas
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Deneke,  Hartwig
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Zitation

Barrientos Velasco, C., Griesche, H. J., Hünerbein, A., Macke, A., Seifert, P., Shupe, M. D., Witthuhn, J., Deneke, H. (2023): Investigation of radiative closure and cloud radiative effects based on ground-based and satellite observations during MOSAiC, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0990


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016456
Zusammenfassung
Significant uncertainties in the prediction of future warming in the Arctic arise from our lack of understanding of governing processes, including cloud radiative feedbacks. The present study compares preliminary simulations of 1D radiative fluxes based on the Cloudnet and ShupeTurner cloud retrievals for the yearlong Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. The analysis is conducted in the context of a radiative closure study at the surface and the top-of-the atmosphere for the upward and downward broadband solar and terrestrial radiative fluxes. The consistency of our simulations and satellite-based estimates from the Clouds and the Earth’s Radiant Energy System (CERES) are analysed by considering several atmospheric and surface-type conditions. Particular focus is given to the effect of clouds on the radiation budget. Based on our simulations and CERES estimates, we find that clouds increase the net radiative fluxes at the surface by about 35.5 W/m² for the entire MOSAiC expedition period. Nevertheless, based on in-situ observations, it is argued that significant uncertainties in the solar and terrestrial affect this estimate of cloud radiative effects. Our research will also address the spatiotemporal variability of clouds and how this might impact the comparison between the point-like ground measurements with the CERES satellite footprint.