%0 Journal Article %1 Williams2018Met %A Williams, K. D. %A Copsey, D. %A Blockley, E. W. %A Bodas-Salcedo, A. %A Calvert, D. %A Comer, R. %A Davis, P. %A Graham, T. %A Hewitt, H. T. %A Hill, R. %A Hyder, P. %A Ineson, S. %A Johns, T. C. %A Keen, A. B. %A Lee, R. W. %A Megann, A. %A Milton, S. F. %A Rae, J. G. L. %A Roberts, M. J. %A Scaife, A. A. %A Schiemann, R. %A Storkey, D. %A Thorpe, L. %A Watterson, I. G. %A Walters, D. N. %A West, A. %A Wood, R. A. %A Woollings, T. %A Xavier, P. K. %D 2018 %J Journal of Advances in Modeling Earth Systems %K CMIP MyUKCPStorylinesWork aerosols blocking climate colleagues hadgem2 hadgem3 jet model nao seasonal %N 2 %P 357--380 %R 10.1002/2017ms001115 %T The Met Office Global Coupled Model 3.0 and 3.1 (GC3.0 and GC3.1) Configurations %U http://dx.doi.org/10.1002/2017ms001115 %V 10 %X The Global Coupled 3 (GC3) configuration of the Met Office Unified Model is presented. Amongst other applications, GC3 is the basis of the United Kingdom's submission to the Coupled Model Intercomparison Project 6 (CMIP6). This paper documents the model components that make up the configuration (although the scientific description of these components are in companion papers), and details the coupling between them. The performance of GC3 is assessed in terms of mean biases and variability in long climate simulations using present-day forcing. The suitability of the configuration for predictability on shorter timescales (weather and seasonal forecasting) is also briefly discussed. The performance of GC3 is compared against GC2, the previous Met Office coupled model configuration, and against an older configuration (HadGEM2-AO) which was the submission to CMIP5. In many respects, the performance of GC3 is comparable with GC2, however there is a notable improvement in the Southern Ocean warm sea surface temperature bias which has been reduced by 75\%, and there are improvements in cloud amount and some aspects of tropical variability. Relative to HadGEM2-AO, many aspects of the present-day climate are improved in GC3 including tropospheric and stratospheric temperature structure, most aspects of tropical and extra-tropical variability and top-of-atmosphere & surface fluxes. A number of outstanding errors are identified including a residual asymmetric sea surface temperature bias (cool northern hemisphere, warm Southern Ocean), an overly strong global hydrological cycle and insufficient European blocking.

@article{Williams2018Met, abstract = {The Global Coupled 3 (GC3) configuration of the Met Office Unified Model is presented. Amongst other applications, GC3 is the basis of the United Kingdom's submission to the Coupled Model Intercomparison Project 6 (CMIP6). This paper documents the model components that make up the configuration (although the scientific description of these components are in companion papers), and details the coupling between them. The performance of GC3 is assessed in terms of mean biases and variability in long climate simulations using present-day forcing. The suitability of the configuration for predictability on shorter timescales (weather and seasonal forecasting) is also briefly discussed. The performance of GC3 is compared against GC2, the previous Met Office coupled model configuration, and against an older configuration (HadGEM2-AO) which was the submission to CMIP5. In many respects, the performance of GC3 is comparable with GC2, however there is a notable improvement in the Southern Ocean warm sea surface temperature bias which has been reduced by 75\%, and there are improvements in cloud amount and some aspects of tropical variability. Relative to HadGEM2-AO, many aspects of the present-day climate are improved in GC3 including tropospheric and stratospheric temperature structure, most aspects of tropical and extra-tropical variability and top-of-atmosphere \& surface fluxes. A number of outstanding errors are identified including a residual asymmetric sea surface temperature bias (cool northern hemisphere, warm Southern Ocean), an overly strong global hydrological cycle and insufficient European blocking.}, added-at = {2018-06-18T21:23:34.000+0200}, author = {Williams, K. D. and Copsey, D. and Blockley, E. W. and Bodas-Salcedo, A. and Calvert, D. and Comer, R. and Davis, P. and Graham, T. and Hewitt, H. T. and Hill, R. and Hyder, P. and Ineson, S. and Johns, T. C. and Keen, A. B. and Lee, R. W. and Megann, A. and Milton, S. F. and Rae, J. G. L. and Roberts, M. J. and Scaife, A. A. and Schiemann, R. and Storkey, D. and Thorpe, L. and Watterson, I. G. and Walters, D. N. and West, A. and Wood, R. A. and Woollings, T. and Xavier, P. K.}, biburl = {https://www.bibsonomy.org/bibtex/27f23274e77394b18f19c74549760a0ff/pbett}, citeulike-article-id = {14505897}, citeulike-linkout-0 = {http://dx.doi.org/10.1002/2017ms001115}, day = 19, doi = {10.1002/2017ms001115}, interhash = {6b79aa28ceff6fe315f2b92a8f1bbd32}, intrahash = {7f23274e77394b18f19c74549760a0ff}, issn = {19422466}, journal = {Journal of Advances in Modeling Earth Systems}, keywords = {CMIP MyUKCPStorylinesWork aerosols blocking climate colleagues hadgem2 hadgem3 jet model nao seasonal}, month = feb, number = 2, pages = {357--380}, posted-at = {2017-12-20 14:09:08}, priority = {2}, timestamp = {2020-04-15T09:30:16.000+0200}, title = {The Met Office Global Coupled Model 3.0 and 3.1 (GC3.0 and GC3.1) Configurations}, url = {http://dx.doi.org/10.1002/2017ms001115}, volume = 10, year = 2018 }