Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic
The magnitude of solar radiative effects (cooling or warming) of black carbon (BC) particles embedded in the Arctic atmosphere and surface snow layer was explored on the basis of case studies. For this purpose, combined at- mospheric and snow radiative transfer simulations were per- formed for cloud...
Published in: | Atmospheric Chemistry and Physics |
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Copernicus Publications on behalf of the European Geosciences Union.
2020
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Online Access: | https://epic.awi.de/id/eprint/52916/ https://epic.awi.de/id/eprint/52916/1/Donth-etal-ACP-2020.pdf http://www.atmospheric-chemistry-and-physics.net https://hdl.handle.net/10013/epic.1a628fb1-10ba-4f54-b711-0515f764e903 |
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ftawi:oai:epic.awi.de:52916 2024-09-15T17:51:41+00:00 Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic Donth, Tobias Ehrlich, André Jäkel, Evelyn Heinold, Bernd Schacht, Jacob Herber, Andreas Zanatta, Marco Wendisch, Manfred 2020-07-13 application/pdf https://epic.awi.de/id/eprint/52916/ https://epic.awi.de/id/eprint/52916/1/Donth-etal-ACP-2020.pdf http://www.atmospheric-chemistry-and-physics.net https://hdl.handle.net/10013/epic.1a628fb1-10ba-4f54-b711-0515f764e903 unknown Copernicus Publications on behalf of the European Geosciences Union. https://epic.awi.de/id/eprint/52916/1/Donth-etal-ACP-2020.pdf Donth, T. , Ehrlich, A. , Jäkel, E. , Heinold, B. , Schacht, J. , Herber, A. orcid:0000-0001-6651-3835 , Zanatta, M. and Wendisch, M. (2020) Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic , Atmos. Chem. Phys.,, 20 , pp. 8139-8156 . doi:10.5194/acp-20-8139-2020 <https://doi.org/10.5194/acp-20-8139-2020> , hdl:10013/epic.1a628fb1-10ba-4f54-b711-0515f764e903 EPIC3Atmos. Chem. Phys.,, Copernicus Publications on behalf of the European Geosciences Union., 20, pp. 8139-8156 Article isiRev 2020 ftawi https://doi.org/10.5194/acp-20-8139-2020 2024-06-24T04:24:41Z The magnitude of solar radiative effects (cooling or warming) of black carbon (BC) particles embedded in the Arctic atmosphere and surface snow layer was explored on the basis of case studies. For this purpose, combined at- mospheric and snow radiative transfer simulations were per- formed for cloudless and cloudy conditions on the basis of BC mass concentrations measured in pristine early summer and more polluted early spring conditions. The area of inter- est is the remote sea-ice-covered Arctic Ocean in the vicin- ity of Spitsbergen, northern Greenland, and northern Alaska typically not affected by local pollution. To account for the radiative interactions between the black-carbon-containing snow surface layer and the atmosphere, an atmospheric and snow radiative transfer model were coupled iteratively. For pristine summer conditions (no atmospheric BC, minimum solar zenith angles of 55◦) and a representative BC particle mass concentration of 5 ng g−1 in the surface snow layer, a positive daily mean solar radiative forcing of +0.2Wm−2 was calculated for the surface radiative budget. A higher load of atmospheric BC representing early springtime conditions results in a slightly negative mean radiative forcing at the surface of about −0.05 W m−2, even when the low BC mass concentration measured in the pristine early summer condi- tions was embedded in the surface snow layer. The total net surface radiative forcing combining the effects of BC em- bedded in the atmosphere and in the snow layer strongly de- pends on the snow optical properties (snow specific surface area and snow density). For the conditions over the Arctic Ocean analyzed in the simulations, it was found that the at- mospheric heating rate by water vapor or clouds is 1 to 2 or-ders of magnitude larger than that by atmospheric BC. Sim- ilarly, the daily mean total heating rate (6 K d−1) within a snowpack due to absorption by the ice was more than 1 order of magnitude larger than that of atmospheric BC (0.2 K d−1). Also, it was shown that the cooling ... Article in Journal/Newspaper Arctic Arctic Ocean black carbon Greenland Sea ice Alaska Spitsbergen Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Atmospheric Chemistry and Physics 20 13 8139 8156 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The magnitude of solar radiative effects (cooling or warming) of black carbon (BC) particles embedded in the Arctic atmosphere and surface snow layer was explored on the basis of case studies. For this purpose, combined at- mospheric and snow radiative transfer simulations were per- formed for cloudless and cloudy conditions on the basis of BC mass concentrations measured in pristine early summer and more polluted early spring conditions. The area of inter- est is the remote sea-ice-covered Arctic Ocean in the vicin- ity of Spitsbergen, northern Greenland, and northern Alaska typically not affected by local pollution. To account for the radiative interactions between the black-carbon-containing snow surface layer and the atmosphere, an atmospheric and snow radiative transfer model were coupled iteratively. For pristine summer conditions (no atmospheric BC, minimum solar zenith angles of 55◦) and a representative BC particle mass concentration of 5 ng g−1 in the surface snow layer, a positive daily mean solar radiative forcing of +0.2Wm−2 was calculated for the surface radiative budget. A higher load of atmospheric BC representing early springtime conditions results in a slightly negative mean radiative forcing at the surface of about −0.05 W m−2, even when the low BC mass concentration measured in the pristine early summer condi- tions was embedded in the surface snow layer. The total net surface radiative forcing combining the effects of BC em- bedded in the atmosphere and in the snow layer strongly de- pends on the snow optical properties (snow specific surface area and snow density). For the conditions over the Arctic Ocean analyzed in the simulations, it was found that the at- mospheric heating rate by water vapor or clouds is 1 to 2 or-ders of magnitude larger than that by atmospheric BC. Sim- ilarly, the daily mean total heating rate (6 K d−1) within a snowpack due to absorption by the ice was more than 1 order of magnitude larger than that of atmospheric BC (0.2 K d−1). Also, it was shown that the cooling ... |
format |
Article in Journal/Newspaper |
author |
Donth, Tobias Ehrlich, André Jäkel, Evelyn Heinold, Bernd Schacht, Jacob Herber, Andreas Zanatta, Marco Wendisch, Manfred |
spellingShingle |
Donth, Tobias Ehrlich, André Jäkel, Evelyn Heinold, Bernd Schacht, Jacob Herber, Andreas Zanatta, Marco Wendisch, Manfred Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic |
author_facet |
Donth, Tobias Ehrlich, André Jäkel, Evelyn Heinold, Bernd Schacht, Jacob Herber, Andreas Zanatta, Marco Wendisch, Manfred |
author_sort |
Donth, Tobias |
title |
Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic |
title_short |
Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic |
title_full |
Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic |
title_fullStr |
Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic |
title_full_unstemmed |
Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic |
title_sort |
combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the arctic |
publisher |
Copernicus Publications on behalf of the European Geosciences Union. |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/52916/ https://epic.awi.de/id/eprint/52916/1/Donth-etal-ACP-2020.pdf http://www.atmospheric-chemistry-and-physics.net https://hdl.handle.net/10013/epic.1a628fb1-10ba-4f54-b711-0515f764e903 |
genre |
Arctic Arctic Ocean black carbon Greenland Sea ice Alaska Spitsbergen |
genre_facet |
Arctic Arctic Ocean black carbon Greenland Sea ice Alaska Spitsbergen |
op_source |
EPIC3Atmos. Chem. Phys.,, Copernicus Publications on behalf of the European Geosciences Union., 20, pp. 8139-8156 |
op_relation |
https://epic.awi.de/id/eprint/52916/1/Donth-etal-ACP-2020.pdf Donth, T. , Ehrlich, A. , Jäkel, E. , Heinold, B. , Schacht, J. , Herber, A. orcid:0000-0001-6651-3835 , Zanatta, M. and Wendisch, M. (2020) Combining atmospheric and snow radiative transfer models to assess the solar radiative effects of black carbon in the Arctic , Atmos. Chem. Phys.,, 20 , pp. 8139-8156 . doi:10.5194/acp-20-8139-2020 <https://doi.org/10.5194/acp-20-8139-2020> , hdl:10013/epic.1a628fb1-10ba-4f54-b711-0515f764e903 |
op_doi |
https://doi.org/10.5194/acp-20-8139-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
13 |
container_start_page |
8139 |
op_container_end_page |
8156 |
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1810293655837081600 |