The Evaluation of the North Atlantic Climate System in UKESM1 Historical Simulations for CMIP6
Earth system models enable a broad range of climate interactions that physical climate models are unable to simulate. However, the extent to which adding Earth system components changes or improves the simulation of the physical climate is not well understood. Here we present a broad multivariate ev...
Published in: | Journal of Advances in Modeling Earth Systems |
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Online Access: | http://plymsea.ac.uk/id/eprint/9102/ http://plymsea.ac.uk/id/eprint/9102/1/Robson%202020.pdf https://doi.org/10.1029/2020MS002126 |
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ftplymouthml:oai:plymsea.ac.uk:9102 2023-05-15T15:11:14+02:00 The Evaluation of the North Atlantic Climate System in UKESM1 Historical Simulations for CMIP6 Robson, J Aksenov, Y Bracegirdle, TJ Dimdore‐Miles, O Griffiths, PT Grosvenor, DP Hodson, DLR Keeble, J MacIntosh, C Megann, A Osprey, S Povey, AC Schröder, D Yang, M Archibald, AT Carslaw, KS Gray, L Jones, C Kerridge, B Knappett, D Kuhlbrodt, T Russo, M Sellar, A Siddans, R Sinha, B Sutton, R Walton, J Wilcox, LJ 2020-09 text http://plymsea.ac.uk/id/eprint/9102/ http://plymsea.ac.uk/id/eprint/9102/1/Robson%202020.pdf https://doi.org/10.1029/2020MS002126 en eng AGU http://plymsea.ac.uk/id/eprint/9102/1/Robson%202020.pdf Robson, J; Aksenov, Y; Bracegirdle, TJ; Dimdore‐Miles, O; Griffiths, PT; Grosvenor, DP; Hodson, DLR; Keeble, J; MacIntosh, C; Megann, A; Osprey, S; Povey, AC; Schröder, D; Yang, M; Archibald, AT; Carslaw, KS; Gray, L; Jones, C; Kerridge, B; Knappett, D; Kuhlbrodt, T; Russo, M; Sellar, A; Siddans, R; Sinha, B; Sutton, R; Walton, J; Wilcox, LJ. 2020 The Evaluation of the North Atlantic Climate System in UKESM1 Historical Simulations for CMIP6. Journal of Advances in Modeling Earth Systems, 12 (9). 1-38. https://doi.org/10.1029/2020MS002126 <https://doi.org/10.1029/2020MS002126> cc_by_4 CC-BY Publication - Article PeerReviewed 2020 ftplymouthml https://doi.org/10.1029/2020MS002126 2022-09-13T05:49:48Z Earth system models enable a broad range of climate interactions that physical climate models are unable to simulate. However, the extent to which adding Earth system components changes or improves the simulation of the physical climate is not well understood. Here we present a broad multivariate evaluation of the North Atlantic climate system in historical simulations of the UK Earth System Model (UKESM1) performed for CMIP6. In particular, we focus on the mean state and the decadal time scale evolution of important variables that span the North Atlantic climate system. In general, UKESM1 performs well and realistically simulates many aspects of the North Atlantic climate system. Like the physical version of the model, we find that changes in external forcing, and particularly aerosol forcing, are an important driver of multidecadal change in UKESM1, especially for Atlantic Multidecadal Variability and the Atlantic Meridional Overturning Circulation. However, many of the shortcomings identified are similar to common biases found in physical climate models, including the physical climate model that underpins UKESM1. For example, the summer jet is too weak and too far poleward; decadal variability in the winter jet is underestimated; intraseasonal stratospheric polar vortex variability is poorly represented; and Arctic sea ice is too thick. Forced shortwave changes may be also too strong in UKESM1, which, given the important role of historical aerosol forcing in shaping the evolution of the North Atlantic in UKESM1, motivates further investigation. Therefore, physical model development, alongside Earth system development, remains crucial in order to improve climate simulations Article in Journal/Newspaper Arctic North Atlantic Sea ice Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML) Arctic Journal of Advances in Modeling Earth Systems 12 9 |
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Open Polar |
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Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML) |
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ftplymouthml |
language |
English |
description |
Earth system models enable a broad range of climate interactions that physical climate models are unable to simulate. However, the extent to which adding Earth system components changes or improves the simulation of the physical climate is not well understood. Here we present a broad multivariate evaluation of the North Atlantic climate system in historical simulations of the UK Earth System Model (UKESM1) performed for CMIP6. In particular, we focus on the mean state and the decadal time scale evolution of important variables that span the North Atlantic climate system. In general, UKESM1 performs well and realistically simulates many aspects of the North Atlantic climate system. Like the physical version of the model, we find that changes in external forcing, and particularly aerosol forcing, are an important driver of multidecadal change in UKESM1, especially for Atlantic Multidecadal Variability and the Atlantic Meridional Overturning Circulation. However, many of the shortcomings identified are similar to common biases found in physical climate models, including the physical climate model that underpins UKESM1. For example, the summer jet is too weak and too far poleward; decadal variability in the winter jet is underestimated; intraseasonal stratospheric polar vortex variability is poorly represented; and Arctic sea ice is too thick. Forced shortwave changes may be also too strong in UKESM1, which, given the important role of historical aerosol forcing in shaping the evolution of the North Atlantic in UKESM1, motivates further investigation. Therefore, physical model development, alongside Earth system development, remains crucial in order to improve climate simulations |
format |
Article in Journal/Newspaper |
author |
Robson, J Aksenov, Y Bracegirdle, TJ Dimdore‐Miles, O Griffiths, PT Grosvenor, DP Hodson, DLR Keeble, J MacIntosh, C Megann, A Osprey, S Povey, AC Schröder, D Yang, M Archibald, AT Carslaw, KS Gray, L Jones, C Kerridge, B Knappett, D Kuhlbrodt, T Russo, M Sellar, A Siddans, R Sinha, B Sutton, R Walton, J Wilcox, LJ |
spellingShingle |
Robson, J Aksenov, Y Bracegirdle, TJ Dimdore‐Miles, O Griffiths, PT Grosvenor, DP Hodson, DLR Keeble, J MacIntosh, C Megann, A Osprey, S Povey, AC Schröder, D Yang, M Archibald, AT Carslaw, KS Gray, L Jones, C Kerridge, B Knappett, D Kuhlbrodt, T Russo, M Sellar, A Siddans, R Sinha, B Sutton, R Walton, J Wilcox, LJ The Evaluation of the North Atlantic Climate System in UKESM1 Historical Simulations for CMIP6 |
author_facet |
Robson, J Aksenov, Y Bracegirdle, TJ Dimdore‐Miles, O Griffiths, PT Grosvenor, DP Hodson, DLR Keeble, J MacIntosh, C Megann, A Osprey, S Povey, AC Schröder, D Yang, M Archibald, AT Carslaw, KS Gray, L Jones, C Kerridge, B Knappett, D Kuhlbrodt, T Russo, M Sellar, A Siddans, R Sinha, B Sutton, R Walton, J Wilcox, LJ |
author_sort |
Robson, J |
title |
The Evaluation of the North Atlantic Climate System in UKESM1 Historical Simulations for CMIP6 |
title_short |
The Evaluation of the North Atlantic Climate System in UKESM1 Historical Simulations for CMIP6 |
title_full |
The Evaluation of the North Atlantic Climate System in UKESM1 Historical Simulations for CMIP6 |
title_fullStr |
The Evaluation of the North Atlantic Climate System in UKESM1 Historical Simulations for CMIP6 |
title_full_unstemmed |
The Evaluation of the North Atlantic Climate System in UKESM1 Historical Simulations for CMIP6 |
title_sort |
evaluation of the north atlantic climate system in ukesm1 historical simulations for cmip6 |
publisher |
AGU |
publishDate |
2020 |
url |
http://plymsea.ac.uk/id/eprint/9102/ http://plymsea.ac.uk/id/eprint/9102/1/Robson%202020.pdf https://doi.org/10.1029/2020MS002126 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic Sea ice |
genre_facet |
Arctic North Atlantic Sea ice |
op_relation |
http://plymsea.ac.uk/id/eprint/9102/1/Robson%202020.pdf Robson, J; Aksenov, Y; Bracegirdle, TJ; Dimdore‐Miles, O; Griffiths, PT; Grosvenor, DP; Hodson, DLR; Keeble, J; MacIntosh, C; Megann, A; Osprey, S; Povey, AC; Schröder, D; Yang, M; Archibald, AT; Carslaw, KS; Gray, L; Jones, C; Kerridge, B; Knappett, D; Kuhlbrodt, T; Russo, M; Sellar, A; Siddans, R; Sinha, B; Sutton, R; Walton, J; Wilcox, LJ. 2020 The Evaluation of the North Atlantic Climate System in UKESM1 Historical Simulations for CMIP6. Journal of Advances in Modeling Earth Systems, 12 (9). 1-38. https://doi.org/10.1029/2020MS002126 <https://doi.org/10.1029/2020MS002126> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2020MS002126 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
12 |
container_issue |
9 |
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