The Radiative Forcing Model Intercomparison Project (RFMIP): Experimental protocol for CMIP6
The phrasing of the first of three questions motivating CMIP6 – “How does the Earth system respond to forcing?” – suggests that forcing is always well-known, yet the radiative forcing to which this question refers has historically been uncertain in coordinated experiments even as understanding of ho...
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ftosti:oai:osti.gov:1361558 2023-07-30T04:06:47+02:00 The Radiative Forcing Model Intercomparison Project (RFMIP): Experimental protocol for CMIP6 Pincus, Robert Forster, Piers M. Stevens, Bjorn 2022-05-23 application/pdf http://www.osti.gov/servlets/purl/1361558 https://www.osti.gov/biblio/1361558 https://doi.org/10.5194/gmd-9-3447-2016 unknown http://www.osti.gov/servlets/purl/1361558 https://www.osti.gov/biblio/1361558 https://doi.org/10.5194/gmd-9-3447-2016 doi:10.5194/gmd-9-3447-2016 58 GEOSCIENCES 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.5194/gmd-9-3447-2016 2023-07-11T09:19:04Z The phrasing of the first of three questions motivating CMIP6 – “How does the Earth system respond to forcing?” – suggests that forcing is always well-known, yet the radiative forcing to which this question refers has historically been uncertain in coordinated experiments even as understanding of how best to infer radiative forcing has evolved. The Radiative Forcing Model Intercomparison Project (RFMIP) endorsed by CMIP6 seeks to provide a foundation for answering the question through three related activities: (i) accurate characterization of the effective radiative forcing relative to a near-preindustrial baseline and careful diagnosis of the components of this forcing; (ii) assessment of the absolute accuracy of clear-sky radiative transfer parameterizations against reference models on the global scales relevant for climate modeling; and (iii) identification of robust model responses to tightly specified aerosol radiative forcing from 1850 to present. Complete characterization of effective radiative forcing can be accomplished with 180 years (Tier 1) of atmosphere-only simulation using a sea-surface temperature and sea ice concentration climatology derived from the host model's preindustrial control simulation. Assessment of parameterization error requires trivial amounts of computation but the development of small amounts of infrastructure: new, spectrally detailed diagnostic output requested as two snapshots at present-day and preindustrial conditions, and results from the model's radiation code applied to specified atmospheric conditions. In conclusion, the search for robust responses to aerosol changes relies on the CMIP6 specification of anthropogenic aerosol properties; models using this specification can contribute to RFMIP with no additional simulation, while those using a full aerosol model are requested to perform at least one and up to four 165-year coupled ocean–atmosphere simulations at Tier 1. Other/Unknown Material Sea ice SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Geoscientific Model Development 9 9 3447 3460 |
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58 GEOSCIENCES 54 ENVIRONMENTAL SCIENCES |
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58 GEOSCIENCES 54 ENVIRONMENTAL SCIENCES Pincus, Robert Forster, Piers M. Stevens, Bjorn The Radiative Forcing Model Intercomparison Project (RFMIP): Experimental protocol for CMIP6 |
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58 GEOSCIENCES 54 ENVIRONMENTAL SCIENCES |
description |
The phrasing of the first of three questions motivating CMIP6 – “How does the Earth system respond to forcing?” – suggests that forcing is always well-known, yet the radiative forcing to which this question refers has historically been uncertain in coordinated experiments even as understanding of how best to infer radiative forcing has evolved. The Radiative Forcing Model Intercomparison Project (RFMIP) endorsed by CMIP6 seeks to provide a foundation for answering the question through three related activities: (i) accurate characterization of the effective radiative forcing relative to a near-preindustrial baseline and careful diagnosis of the components of this forcing; (ii) assessment of the absolute accuracy of clear-sky radiative transfer parameterizations against reference models on the global scales relevant for climate modeling; and (iii) identification of robust model responses to tightly specified aerosol radiative forcing from 1850 to present. Complete characterization of effective radiative forcing can be accomplished with 180 years (Tier 1) of atmosphere-only simulation using a sea-surface temperature and sea ice concentration climatology derived from the host model's preindustrial control simulation. Assessment of parameterization error requires trivial amounts of computation but the development of small amounts of infrastructure: new, spectrally detailed diagnostic output requested as two snapshots at present-day and preindustrial conditions, and results from the model's radiation code applied to specified atmospheric conditions. In conclusion, the search for robust responses to aerosol changes relies on the CMIP6 specification of anthropogenic aerosol properties; models using this specification can contribute to RFMIP with no additional simulation, while those using a full aerosol model are requested to perform at least one and up to four 165-year coupled ocean–atmosphere simulations at Tier 1. |
author |
Pincus, Robert Forster, Piers M. Stevens, Bjorn |
author_facet |
Pincus, Robert Forster, Piers M. Stevens, Bjorn |
author_sort |
Pincus, Robert |
title |
The Radiative Forcing Model Intercomparison Project (RFMIP): Experimental protocol for CMIP6 |
title_short |
The Radiative Forcing Model Intercomparison Project (RFMIP): Experimental protocol for CMIP6 |
title_full |
The Radiative Forcing Model Intercomparison Project (RFMIP): Experimental protocol for CMIP6 |
title_fullStr |
The Radiative Forcing Model Intercomparison Project (RFMIP): Experimental protocol for CMIP6 |
title_full_unstemmed |
The Radiative Forcing Model Intercomparison Project (RFMIP): Experimental protocol for CMIP6 |
title_sort |
radiative forcing model intercomparison project (rfmip): experimental protocol for cmip6 |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1361558 https://www.osti.gov/biblio/1361558 https://doi.org/10.5194/gmd-9-3447-2016 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
http://www.osti.gov/servlets/purl/1361558 https://www.osti.gov/biblio/1361558 https://doi.org/10.5194/gmd-9-3447-2016 doi:10.5194/gmd-9-3447-2016 |
op_doi |
https://doi.org/10.5194/gmd-9-3447-2016 |
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Geoscientific Model Development |
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9 |
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9 |
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3447 |
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3460 |
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