%0 Journal Article %1 Walters2017Met %A Walters, David %A Baran, Anthony %A Boutle, Ian %A Brooks, Malcolm %A Earnshaw, Paul %A Edwards, John %A Furtado, Kalli %A Hill, Peter %A Lock, Adrian %A Manners, James %A Morcrette, Cyril %A Mulcahy, Jane %A Sanchez, Claudio %A Smith, Chris %A Stratton, Rachel %A Tennant, Warren %A Tomassini, Lorenzo %A Van Weverberg, Kwinten %A Vosper, Simon %A Willett, Martin %A Browse, Jo %A Bushell, Andrew %A Dalvi, Mohit %A Essery, Richard %A Gedney, Nicola %A Hardiman, Steven %A Johnson, Ben %A Johnson, Colin %A Jones, Andy %A Mann, Graham %A Milton, Sean %A Rumbold, Heather %A Sellar, Alistair %A Ujiie, Masashi %A Whitall, Michael %A Williams, Keith %A Zerroukat, Mohamed %D 2017 %J Geoscientific Model Development Discussions %K nwp colleagues model hadgem3 %P 1--78 %R 10.5194/gmd-2017-291 %T The Met Office Unified Model Global Atmosphere 7.0/7.1 and JULES Global Land 7.0 configurations %U http://dx.doi.org/10.5194/gmd-2017-291 %X We describe Global Atmosphere 7.0 and Global Land 7.0 (GA7.0/GL7.0): the latest science configurations of the Met Office Unified Model and JULES land surface model developed for use across weather and climate timescales. GA7.0 and GL7.0 include incremental developments and targeted improvements that between them address four critical errors identified in previous configurations: excessive precipitation biases over India, warm/moist biases in the tropical tropopause layer, a source of energy non-conservation in the advection scheme and excessive surface radiation biases over the Southern Ocean. They also include two new parametrisations, namely the UKCA Glomap-mode aerosol scheme and the JULES multi-layer snow scheme, which improve the fidelity of the simulation and were required for the coupled climate models and Earth system models that will use these configurations in submissions to CMIP6. In addition, we describe the GA7.1 branch configuration, which reduces an overly negative anthropogenic aerosol effective radiative forcing in GA7.0, whilst maintaining the quality of simulations of the present-day climate. GA7.1/GL7.0 will form the physical atmosphere/land component in the HadGEM3-GC3.1 and UKESM1 climate models.

@article{Walters2017Met, abstract = {We describe Global Atmosphere 7.0 and Global Land 7.0 (GA7.0/GL7.0): the latest science configurations of the Met Office Unified Model and JULES land surface model developed for use across weather and climate timescales. GA7.0 and GL7.0 include incremental developments and targeted improvements that between them address four critical errors identified in previous configurations: excessive precipitation biases over India, warm/moist biases in the tropical tropopause layer, a source of energy non-conservation in the advection scheme and excessive surface radiation biases over the Southern Ocean. They also include two new parametrisations, namely the UKCA Glomap-mode aerosol scheme and the JULES multi-layer snow scheme, which improve the fidelity of the simulation and were required for the coupled climate models and Earth system models that will use these configurations in submissions to CMIP6. In addition, we describe the GA7.1 branch configuration, which reduces an overly negative anthropogenic aerosol effective radiative forcing in GA7.0, whilst maintaining the quality of simulations of the present-day climate. GA7.1/GL7.0 will form the physical atmosphere/land component in the HadGEM3-GC3.1 and UKESM1 climate models.}, added-at = {2018-06-18T21:23:34.000+0200}, author = {Walters, David and Baran, Anthony and Boutle, Ian and Brooks, Malcolm and Earnshaw, Paul and Edwards, John and Furtado, Kalli and Hill, Peter and Lock, Adrian and Manners, James and Morcrette, Cyril and Mulcahy, Jane and Sanchez, Claudio and Smith, Chris and Stratton, Rachel and Tennant, Warren and Tomassini, Lorenzo and Van Weverberg, Kwinten and Vosper, Simon and Willett, Martin and Browse, Jo and Bushell, Andrew and Dalvi, Mohit and Essery, Richard and Gedney, Nicola and Hardiman, Steven and Johnson, Ben and Johnson, Colin and Jones, Andy and Mann, Graham and Milton, Sean and Rumbold, Heather and Sellar, Alistair and Ujiie, Masashi and Whitall, Michael and Williams, Keith and Zerroukat, Mohamed}, biburl = {https://www.bibsonomy.org/bibtex/24a783cd7461926f9ed0947ee02e95651/pbett}, citeulike-article-id = {14485730}, citeulike-linkout-0 = {http://dx.doi.org/10.5194/gmd-2017-291}, day = 28, doi = {10.5194/gmd-2017-291}, interhash = {6945e631d0735316d4dd4dcaa5976e14}, intrahash = {4a783cd7461926f9ed0947ee02e95651}, issn = {1991-962X}, journal = {Geoscientific Model Development Discussions}, keywords = {nwp colleagues model hadgem3}, month = nov, pages = {1--78}, posted-at = {2017-11-29 09:02:59}, priority = {2}, timestamp = {2018-06-22T18:38:30.000+0200}, title = {The Met Office Unified Model Global Atmosphere 7.0/7.1 and JULES Global Land 7.0 configurations}, url = {http://dx.doi.org/10.5194/gmd-2017-291}, year = 2017 }