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Radiative Energy Flux Variation from 2001–2020

Am Langenstück 13, 65343 Eltville, Germany
Department of Chemistry, University of Hamburg, Papenkamp 14, 22607 Hamburg, Germany
Author to whom correspondence should be addressed.
Academic Editors: Baojie He, Ayyoob Sharifi, Chi Feng and Jun Yang
Atmosphere 2021, 12(10), 1297;
Received: 1 September 2021 / Revised: 30 September 2021 / Accepted: 1 October 2021 / Published: 5 October 2021
(This article belongs to the Topic Climate Change and Environmental Sustainability)
Radiative energy flux data, downloaded from CERES, are evaluated with respect to their variations from 2001 to 2020. We found the declining outgoing shortwave radiation to be the most important contributor for a positive TOA (top of the atmosphere) net flux of 0.8 W/m2 in this time frame. We compare clear sky with cloudy areas and find that changes in the cloud structure should be the root cause for the shortwave trend. The radiative flux data are compared with ocean heat content data and analyzed in the context of a longer-term climate system enthalpy estimation going back to the year 1750. We also report differences in the trends for the Northern and Southern hemisphere. The radiative data indicate more variability in the North and higher stability in the South. The drop of cloudiness around the millennium by about 1.5% has certainly fostered the positive net radiative flux. The declining TOA SW (out) is the major heating cause (+1.42 W/m2 from 2001 to 2020). It is almost compensated by the growing chilling TOA LW (out) (−1.1 W/m2). This leads together with a reduced incoming solar of −0.17 W/m2 to a small growth of imbalance of 0.15 W/m2. We further present surface flux data which support the strong influence of the cloud cover on the radiative budget. View Full-Text
Keywords: radiative energy flux; CERES; shortwave flux; longwave flux; cloud thinning radiative energy flux; CERES; shortwave flux; longwave flux; cloud thinning
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MDPI and ACS Style

Dübal, H.-R.; Vahrenholt, F. Radiative Energy Flux Variation from 2001–2020. Atmosphere 2021, 12, 1297.

AMA Style

Dübal H-R, Vahrenholt F. Radiative Energy Flux Variation from 2001–2020. Atmosphere. 2021; 12(10):1297.

Chicago/Turabian Style

Dübal, Hans-Rolf, and Fritz Vahrenholt. 2021. "Radiative Energy Flux Variation from 2001–2020" Atmosphere 12, no. 10: 1297.

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