Behaviour of the winter North Atlantic eddy-driven jet stream in the CMIP3 integrations
A systematic analysis of the winter North Atlantic eddy-driven jet stream latitude and wind speed from 52 model integrations, taken from the coupled model intercomparison project phase 3, is carried out and compared to results obtained from the ERA-40 reanalyses. We consider here a control simulatio...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2013
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| _version_ | 1797081371373469696 |
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| author | Hannachi, A Barnes, E Woollings, T |
| author_facet | Hannachi, A Barnes, E Woollings, T |
| author_sort | Hannachi, A |
| collection | OXFORD |
| description | A systematic analysis of the winter North Atlantic eddy-driven jet stream latitude and wind speed from 52 model integrations, taken from the coupled model intercomparison project phase 3, is carried out and compared to results obtained from the ERA-40 reanalyses. We consider here a control simulation, twentieth century simulation, and two time periods (2046-2065 and 2081-2100) from a twenty-first century, high-emission A2 forced simulation. The jet wind speed seasonality is found to be similar between the twentieth century simulations and the ERA-40 reanalyses and also between the control and forced simulations although nearly half of the models overestimate the amplitude of the seasonal cycle. A systematic equatorward bias of the models jet latitude seasonality, by up to 7°, is observed, and models additionally overestimate the seasonal cycle of jet latitude about the mean, with the majority of the models showing equatorward and poleward biases during the cold and warm seasons respectively. A main finding of this work is that no GCM under any forcing scenario considered here is able to simulate the trimodal behaviour of the observed jet latitude distribution. The models suffer from serious problems in the structure of jet variability, rather than just quantitiative errors in the statistical moments. © 2012 Springer-Verlag Berlin Heidelberg. |
| first_indexed | 2024-03-07T01:13:32Z |
| format | Journal article |
| id | oxford-uuid:8ddc8688-caf2-4f0d-8280-647f5a466902 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:13:32Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:8ddc8688-caf2-4f0d-8280-647f5a4669022022-03-26T22:53:52ZBehaviour of the winter North Atlantic eddy-driven jet stream in the CMIP3 integrationsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8ddc8688-caf2-4f0d-8280-647f5a466902EnglishSymplectic Elements at Oxford2013Hannachi, ABarnes, EWoollings, TA systematic analysis of the winter North Atlantic eddy-driven jet stream latitude and wind speed from 52 model integrations, taken from the coupled model intercomparison project phase 3, is carried out and compared to results obtained from the ERA-40 reanalyses. We consider here a control simulation, twentieth century simulation, and two time periods (2046-2065 and 2081-2100) from a twenty-first century, high-emission A2 forced simulation. The jet wind speed seasonality is found to be similar between the twentieth century simulations and the ERA-40 reanalyses and also between the control and forced simulations although nearly half of the models overestimate the amplitude of the seasonal cycle. A systematic equatorward bias of the models jet latitude seasonality, by up to 7°, is observed, and models additionally overestimate the seasonal cycle of jet latitude about the mean, with the majority of the models showing equatorward and poleward biases during the cold and warm seasons respectively. A main finding of this work is that no GCM under any forcing scenario considered here is able to simulate the trimodal behaviour of the observed jet latitude distribution. The models suffer from serious problems in the structure of jet variability, rather than just quantitiative errors in the statistical moments. © 2012 Springer-Verlag Berlin Heidelberg. |
| spellingShingle | Hannachi, A Barnes, E Woollings, T Behaviour of the winter North Atlantic eddy-driven jet stream in the CMIP3 integrations |
| title | Behaviour of the winter North Atlantic eddy-driven jet stream in the CMIP3 integrations |
| title_full | Behaviour of the winter North Atlantic eddy-driven jet stream in the CMIP3 integrations |
| title_fullStr | Behaviour of the winter North Atlantic eddy-driven jet stream in the CMIP3 integrations |
| title_full_unstemmed | Behaviour of the winter North Atlantic eddy-driven jet stream in the CMIP3 integrations |
| title_short | Behaviour of the winter North Atlantic eddy-driven jet stream in the CMIP3 integrations |
| title_sort | behaviour of the winter north atlantic eddy driven jet stream in the cmip3 integrations |
| work_keys_str_mv | AT hannachia behaviourofthewinternorthatlanticeddydrivenjetstreaminthecmip3integrations AT barnese behaviourofthewinternorthatlanticeddydrivenjetstreaminthecmip3integrations AT woollingst behaviourofthewinternorthatlanticeddydrivenjetstreaminthecmip3integrations |