Comparison of Clouds and Cloud Feedback between AMIP5 and AMIP6
We examine the changes in clouds and cloud feedback between Phase 5 (AMIP5) and Phase 6 (AMIP6) of the Atmospheric Model Intercomparison Project. Each model is perturbed by uniformly increasing the sea surface temperature by 4 K. The simulated cloud fraction, the perturbed states and cloud radiative...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/14/6/978 |
| _version_ | 1797596181808807936 |
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| author | Yuanchong Zhang Zhonghai Jin Matteo Ottaviani |
| author_facet | Yuanchong Zhang Zhonghai Jin Matteo Ottaviani |
| author_sort | Yuanchong Zhang |
| collection | DOAJ |
| description | We examine the changes in clouds and cloud feedback between Phase 5 (AMIP5) and Phase 6 (AMIP6) of the Atmospheric Model Intercomparison Project. Each model is perturbed by uniformly increasing the sea surface temperature by 4 K. The simulated cloud fraction, the perturbed states and cloud radiative kernels are used to derive cloud feedback in the shortwave (SW), longwave (LW) and their sum (Net). Compared to AMIP5, the cloud fraction in AMIP6 increases by 9.1%, while the perturbation leads to a 0.25% decrease. The Net cloud feedback at the top of the atmosphere (TOA) is almost double (174%). Statistical tests support that this change is mainly due to an increase in the surface SW cloud feedback caused by optically thick, middle and low clouds. The contribution of the atmospheric Net component (12%) stems from the increase in the atmospheric LW cloud feedback, likely to play a role in weakening (strengthening) the northward (southward) meridional atmospheric energy transport, while the opposite is true for the surface LW and Net cloud feedback in the meridional oceanic energy transport. The substantial increase in cloud feedback at the TOA primarily contributes to the higher climate sensitivity. The cloud feedback spread in AMIP6 is comparable to that in AMIP5. |
| first_indexed | 2024-03-11T02:47:56Z |
| format | Article |
| id | doaj.art-a4dd5161de344c098566d1ad800ef6ce |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-11T02:47:56Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-a4dd5161de344c098566d1ad800ef6ce2023-11-18T09:14:32ZengMDPI AGAtmosphere2073-44332023-06-0114697810.3390/atmos14060978Comparison of Clouds and Cloud Feedback between AMIP5 and AMIP6Yuanchong Zhang0Zhonghai Jin1Matteo Ottaviani2Business Integra Inc., 2880 Broadway, New York, NY 10025, USANASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025, USANASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025, USAWe examine the changes in clouds and cloud feedback between Phase 5 (AMIP5) and Phase 6 (AMIP6) of the Atmospheric Model Intercomparison Project. Each model is perturbed by uniformly increasing the sea surface temperature by 4 K. The simulated cloud fraction, the perturbed states and cloud radiative kernels are used to derive cloud feedback in the shortwave (SW), longwave (LW) and their sum (Net). Compared to AMIP5, the cloud fraction in AMIP6 increases by 9.1%, while the perturbation leads to a 0.25% decrease. The Net cloud feedback at the top of the atmosphere (TOA) is almost double (174%). Statistical tests support that this change is mainly due to an increase in the surface SW cloud feedback caused by optically thick, middle and low clouds. The contribution of the atmospheric Net component (12%) stems from the increase in the atmospheric LW cloud feedback, likely to play a role in weakening (strengthening) the northward (southward) meridional atmospheric energy transport, while the opposite is true for the surface LW and Net cloud feedback in the meridional oceanic energy transport. The substantial increase in cloud feedback at the TOA primarily contributes to the higher climate sensitivity. The cloud feedback spread in AMIP6 is comparable to that in AMIP5.https://www.mdpi.com/2073-4433/14/6/978cloud feedbackcloud radiative kernel3 cloud modeling4 AMIP5AMIP65 climate modeling |
| spellingShingle | Yuanchong Zhang Zhonghai Jin Matteo Ottaviani Comparison of Clouds and Cloud Feedback between AMIP5 and AMIP6 Atmosphere cloud feedback cloud radiative kernel 3 cloud modeling 4 AMIP5 AMIP6 5 climate modeling |
| title | Comparison of Clouds and Cloud Feedback between AMIP5 and AMIP6 |
| title_full | Comparison of Clouds and Cloud Feedback between AMIP5 and AMIP6 |
| title_fullStr | Comparison of Clouds and Cloud Feedback between AMIP5 and AMIP6 |
| title_full_unstemmed | Comparison of Clouds and Cloud Feedback between AMIP5 and AMIP6 |
| title_short | Comparison of Clouds and Cloud Feedback between AMIP5 and AMIP6 |
| title_sort | comparison of clouds and cloud feedback between amip5 and amip6 |
| topic | cloud feedback cloud radiative kernel 3 cloud modeling 4 AMIP5 AMIP6 5 climate modeling |
| url | https://www.mdpi.com/2073-4433/14/6/978 |
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