Equator-to-pole temperature differences and the extra-tropical storm track responses of the CMIP5 climate models
This paper aims to understand the physical processes causing the large spread in the storm track projections of the CMIP5 climate models. In particular, the relationship between the climate change responses of the storm tracks, as measured by the 2-6 day mean sea level pressure variance, and the equ...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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Springer Verlag
2014
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| _version_ | 1797097825328168960 |
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| author | Harvey, B Shaffrey, L Woollings, T |
| author_facet | Harvey, B Shaffrey, L Woollings, T |
| author_sort | Harvey, B |
| collection | OXFORD |
| description | This paper aims to understand the physical processes causing the large spread in the storm track projections of the CMIP5 climate models. In particular, the relationship between the climate change responses of the storm tracks, as measured by the 2-6 day mean sea level pressure variance, and the equator-to-pole temperature differences at upper- and lower-tropospheric levels is investigated. In the southern hemisphere the responses of the upper- and lower-tropospheric temperature differences are correlated across the models and as a result they share similar associations with the storm track responses. There are large regions in which the storm track responses are correlated with the temperature difference responses, and a simple linear regression model based on the temperature differences at either level captures the spatial pattern of the mean storm track response as well explaining between 30 and 60 % of the inter-model variance of the storm track responses. In the northern hemisphere the responses of the two temperature differences are not significantly correlated and their associations with the storm track responses are more complicated. In summer, the responses of the lower-tropospheric temperature differences dominate the inter-model spread of the storm track responses. In winter, the responses of the upper- and lower-temperature differences both play a role. The results suggest that there is potential to reduce the spread in storm track responses by constraining the relative magnitudes of the warming in the tropical and polar regions. © 2013 Springer-Verlag Berlin Heidelberg. |
| first_indexed | 2024-03-07T05:00:49Z |
| format | Journal article |
| id | oxford-uuid:d839ca5e-3059-481b-a8cd-12ca029ac1c8 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:00:49Z |
| publishDate | 2014 |
| publisher | Springer Verlag |
| record_format | dspace |
| spelling | oxford-uuid:d839ca5e-3059-481b-a8cd-12ca029ac1c82022-03-27T08:46:44ZEquator-to-pole temperature differences and the extra-tropical storm track responses of the CMIP5 climate modelsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d839ca5e-3059-481b-a8cd-12ca029ac1c8EnglishSymplectic Elements at OxfordSpringer Verlag2014Harvey, BShaffrey, LWoollings, TThis paper aims to understand the physical processes causing the large spread in the storm track projections of the CMIP5 climate models. In particular, the relationship between the climate change responses of the storm tracks, as measured by the 2-6 day mean sea level pressure variance, and the equator-to-pole temperature differences at upper- and lower-tropospheric levels is investigated. In the southern hemisphere the responses of the upper- and lower-tropospheric temperature differences are correlated across the models and as a result they share similar associations with the storm track responses. There are large regions in which the storm track responses are correlated with the temperature difference responses, and a simple linear regression model based on the temperature differences at either level captures the spatial pattern of the mean storm track response as well explaining between 30 and 60 % of the inter-model variance of the storm track responses. In the northern hemisphere the responses of the two temperature differences are not significantly correlated and their associations with the storm track responses are more complicated. In summer, the responses of the lower-tropospheric temperature differences dominate the inter-model spread of the storm track responses. In winter, the responses of the upper- and lower-temperature differences both play a role. The results suggest that there is potential to reduce the spread in storm track responses by constraining the relative magnitudes of the warming in the tropical and polar regions. © 2013 Springer-Verlag Berlin Heidelberg. |
| spellingShingle | Harvey, B Shaffrey, L Woollings, T Equator-to-pole temperature differences and the extra-tropical storm track responses of the CMIP5 climate models |
| title | Equator-to-pole temperature differences and the extra-tropical storm track responses of the CMIP5 climate models |
| title_full | Equator-to-pole temperature differences and the extra-tropical storm track responses of the CMIP5 climate models |
| title_fullStr | Equator-to-pole temperature differences and the extra-tropical storm track responses of the CMIP5 climate models |
| title_full_unstemmed | Equator-to-pole temperature differences and the extra-tropical storm track responses of the CMIP5 climate models |
| title_short | Equator-to-pole temperature differences and the extra-tropical storm track responses of the CMIP5 climate models |
| title_sort | equator to pole temperature differences and the extra tropical storm track responses of the cmip5 climate models |
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