Radiative Energy Flux Variation from 2001–2020
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/m<sup>2</sup> in this...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/12/10/1297 |
| _version_ | 1827680198845267968 |
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| author | Hans-Rolf Dübal Fritz Vahrenholt |
| author_facet | Hans-Rolf Dübal Fritz Vahrenholt |
| author_sort | Hans-Rolf Dübal |
| collection | DOAJ |
| description | 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/m<sup>2</sup> 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/m<sup>2</sup> from 2001 to 2020). It is almost compensated by the growing chilling TOA LW (out) (−1.1 W/m<sup>2</sup>). This leads together with a reduced incoming solar of −0.17 W/m<sup>2</sup> to a small growth of imbalance of 0.15 W/m<sup>2</sup>. We further present surface flux data which support the strong influence of the cloud cover on the radiative budget. |
| first_indexed | 2024-03-10T06:44:34Z |
| format | Article |
| id | doaj.art-ae03ae6db5cc44ec9bd39742008bac8e |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T06:44:34Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-ae03ae6db5cc44ec9bd39742008bac8e2023-11-22T17:25:22ZengMDPI AGAtmosphere2073-44332021-10-011210129710.3390/atmos12101297Radiative Energy Flux Variation from 2001–2020Hans-Rolf Dübal0Fritz Vahrenholt1Am Langenstück 13, 65343 Eltville, GermanyDepartment of Chemistry, University of Hamburg, Papenkamp 14, 22607 Hamburg, GermanyRadiative 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/m<sup>2</sup> 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/m<sup>2</sup> from 2001 to 2020). It is almost compensated by the growing chilling TOA LW (out) (−1.1 W/m<sup>2</sup>). This leads together with a reduced incoming solar of −0.17 W/m<sup>2</sup> to a small growth of imbalance of 0.15 W/m<sup>2</sup>. We further present surface flux data which support the strong influence of the cloud cover on the radiative budget.https://www.mdpi.com/2073-4433/12/10/1297radiative energy fluxCERESshortwave fluxlongwave fluxcloud thinning |
| spellingShingle | Hans-Rolf Dübal Fritz Vahrenholt Radiative Energy Flux Variation from 2001–2020 Atmosphere radiative energy flux CERES shortwave flux longwave flux cloud thinning |
| title | Radiative Energy Flux Variation from 2001–2020 |
| title_full | Radiative Energy Flux Variation from 2001–2020 |
| title_fullStr | Radiative Energy Flux Variation from 2001–2020 |
| title_full_unstemmed | Radiative Energy Flux Variation from 2001–2020 |
| title_short | Radiative Energy Flux Variation from 2001–2020 |
| title_sort | radiative energy flux variation from 2001 2020 |
| topic | radiative energy flux CERES shortwave flux longwave flux cloud thinning |
| url | https://www.mdpi.com/2073-4433/12/10/1297 |
| work_keys_str_mv | AT hansrolfdubal radiativeenergyfluxvariationfrom20012020 AT fritzvahrenholt radiativeenergyfluxvariationfrom20012020 |