Impact of four‐stream radiative transfer algorithm on aerosol direct radiative effect and forcing
Abstract Large uncertainties remain in the estimation of aerosol direct radiative effect ( DRE ) and forcing ( DRF ). In this work, using an aerosol‐climate model with two‐ and four‐stream radiation schemes, we show that the radiative transfer algorithms contribute to the uncertainties. Aerosol shor...
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crwiley:10.1002/joc.4289 2024-06-09T07:44:22+00:00 Impact of four‐stream radiative transfer algorithm on aerosol direct radiative effect and forcing Zhang, Hua Wang, Zhili Zhang, Feng Jing, Xianwen National Natural Science Foundation of China 2015 http://dx.doi.org/10.1002/joc.4289 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.4289 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.4289 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 35, issue 14, page 4318-4328 ISSN 0899-8418 1097-0088 journal-article 2015 crwiley https://doi.org/10.1002/joc.4289 2024-05-16T14:24:22Z Abstract Large uncertainties remain in the estimation of aerosol direct radiative effect ( DRE ) and forcing ( DRF ). In this work, using an aerosol‐climate model with two‐ and four‐stream radiation schemes, we show that the radiative transfer algorithms contribute to the uncertainties. Aerosol shortwave DREs and heating rate are underestimated significantly by the two‐stream algorithm. For present‐day conditions, the four‐stream algorithms are found to enhance global annual mean aerosol shortwave DREs by more than 8% (14%) at the top of the atmosphere ( TOA ), 15% (18%) in the atmosphere, and 12% (15%) at the surface for all‐sky (clear‐sky) case. The regional‐averaged relative differences in aerosol shortwave DREs between the two‐ and four‐stream algorithms increase as latitude increases, exceeding 25% at the TOA and 30% at the surface in the high latitudes of the Southern Hemisphere. The DRE differences due to the four‐stream algorithms are negative, except for the Arctic, Tibetan Plateau, Arabia, and Sahara, at the TOA , are positive in the atmosphere, and are negative at the surface, with the maximum exceeding 4.0 W m −2 . Increases in aerosol shortwave heating rates due to the four‐stream algorithms are generally more than 10% and may even exceed 100%. Our results also show that the two‐stream algorithm underestimates the DRFs due to anthropogenic aerosols. Significant underestimation appears in the middle latitudes of the Northern Hemisphere, with the maximum being close to the quantity of 0.6 W m −2 for clear‐sky case. This study indicates that a multi‐stream radiative transfer algorithm is necessary to reduce the uncertainties of aerosol DREs and DRFs estimated by global climate models. Article in Journal/Newspaper Arctic Wiley Online Library Arctic International Journal of Climatology 35 14 4318 4328 |
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English |
description |
Abstract Large uncertainties remain in the estimation of aerosol direct radiative effect ( DRE ) and forcing ( DRF ). In this work, using an aerosol‐climate model with two‐ and four‐stream radiation schemes, we show that the radiative transfer algorithms contribute to the uncertainties. Aerosol shortwave DREs and heating rate are underestimated significantly by the two‐stream algorithm. For present‐day conditions, the four‐stream algorithms are found to enhance global annual mean aerosol shortwave DREs by more than 8% (14%) at the top of the atmosphere ( TOA ), 15% (18%) in the atmosphere, and 12% (15%) at the surface for all‐sky (clear‐sky) case. The regional‐averaged relative differences in aerosol shortwave DREs between the two‐ and four‐stream algorithms increase as latitude increases, exceeding 25% at the TOA and 30% at the surface in the high latitudes of the Southern Hemisphere. The DRE differences due to the four‐stream algorithms are negative, except for the Arctic, Tibetan Plateau, Arabia, and Sahara, at the TOA , are positive in the atmosphere, and are negative at the surface, with the maximum exceeding 4.0 W m −2 . Increases in aerosol shortwave heating rates due to the four‐stream algorithms are generally more than 10% and may even exceed 100%. Our results also show that the two‐stream algorithm underestimates the DRFs due to anthropogenic aerosols. Significant underestimation appears in the middle latitudes of the Northern Hemisphere, with the maximum being close to the quantity of 0.6 W m −2 for clear‐sky case. This study indicates that a multi‐stream radiative transfer algorithm is necessary to reduce the uncertainties of aerosol DREs and DRFs estimated by global climate models. |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Zhang, Hua Wang, Zhili Zhang, Feng Jing, Xianwen |
spellingShingle |
Zhang, Hua Wang, Zhili Zhang, Feng Jing, Xianwen Impact of four‐stream radiative transfer algorithm on aerosol direct radiative effect and forcing |
author_facet |
Zhang, Hua Wang, Zhili Zhang, Feng Jing, Xianwen |
author_sort |
Zhang, Hua |
title |
Impact of four‐stream radiative transfer algorithm on aerosol direct radiative effect and forcing |
title_short |
Impact of four‐stream radiative transfer algorithm on aerosol direct radiative effect and forcing |
title_full |
Impact of four‐stream radiative transfer algorithm on aerosol direct radiative effect and forcing |
title_fullStr |
Impact of four‐stream radiative transfer algorithm on aerosol direct radiative effect and forcing |
title_full_unstemmed |
Impact of four‐stream radiative transfer algorithm on aerosol direct radiative effect and forcing |
title_sort |
impact of four‐stream radiative transfer algorithm on aerosol direct radiative effect and forcing |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1002/joc.4289 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.4289 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.4289 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
International Journal of Climatology volume 35, issue 14, page 4318-4328 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.4289 |
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International Journal of Climatology |
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35 |
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14 |
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4318 |
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4328 |
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1801373119749816320 |