@article{fdi:010082056, title = {{T}he tuning strategy of {IPSL}-{CM}6{A}-{LR}}, author = {{M}ignot, {J}uliette and {H}ourdin, {F}. and {D}eshayes, {J}. and {B}oucher, {O}. and {G}astineau, {G}. and {M}usat, {I}. and {V}ancoppenolle, {M}. and {S}ervonnat, {J}. and {C}aubel, {A}. and {C}heruy, {F}. and {D}envil, {S}. and {D}ufresne, {J}. {L}. and {E}the, {C}. and {F}airhead, {L}. and {F}oujols, {M}. {A}. and {G}randpeix, {J}. {Y}. and {L}evavasseur, {G}. and {M}arti, {O}. and {M}enary, {M}. and {R}io, {C}. and {R}ousset, {C}. and {S}ilvy, {Y}.}, editor = {}, language = {{ENG}}, abstract = {{T}he assessment of current and future risks for natural and human systems associated with climate change largely relies on numerical simulations performed with state-of-the-art climate models. {V}arious steps are involved in the development of such models, from development of individual components of the climate system up to free parameter calibration of the fully coupled model. {H}ere, we describe the final tuning phase for the {IPSL}-{CM}6{A}-{LR} climate model. {T}his phase alone lasted more than 3 years and relied on several pillars: (i) the tuning against present-day conditions given a small adjustment of the ocean surface albedo to compensate for the current oceanic heat uptake, (ii) the release of successive versions after adjustments of the individual components, implying a systematic and recurrent adjustment of the atmospheric energetics, and (iii) the use of a few metrics based on large scale variables such as near-global mean temperature, summer {A}rctic sea-ice extent, as targets for the tuning. {S}uccesses, lessons and prospects of this tuning strategy are discussed.}, keywords = {atmospheric energetic adjustment ; calibration ; climate model tuning ; metrics ; present-day control}, booktitle = {}, journal = {{J}ournal of {A}dvances in {M}odeling {E}arth {S}ystems}, volume = {13}, numero = {5}, pages = {e2020{MS}002340 [23 p.]}, year = {2021}, DOI = {10.1029/2020ms002340}, URL = {https://www.documentation.ird.fr/hor/fdi:010082056}, }