@article{fdi:010084548, title = {{E}ffects of forcing differences and initial conditions on inter-model agreement in the {V}ol{MIP} volc-pinatubo-full experiment}, author = {{Z}anchettin, {D}. and {T}immreck, {C}. and {K}hodri, {M}yriam and {S}chmidt, {A}. and {T}oohey, {M}. and {A}be, {M}. and {B}ekki, {S}. and {C}ole, {J}. and {F}ang, {S}. {W}. and {F}eng, {W}. {H}. and {H}egerl, {G}. and {J}ohnson, {B}. and {L}ebas, {N}. and {L}e{G}rande, {A}. {N}. and {M}ann, {G}. {W}. and {M}arshall, {L}. and {R}ieger, {L}. and {R}obock, {A}. and {R}ubinetti, {S}. and {T}sigaridis, {K}. and {W}eierbach, {H}.}, editor = {}, language = {{ENG}}, abstract = {{T}his paper provides initial results from a multi-model ensemble analysis based on the volc-pinatubo-full experiment performed within the {M}odel {I}ntercomparison {P}roject on the climatic response to {V}olcanic forcing ({V}ol{MIP}) as part of the sixth phase of the {C}oupled {M}odel {I}ntercomparison {P}roject ({CMIP}6). {T}he volc-pinatubo-full experiment is based on an ensemble of volcanic forcing-only climate simulations with the same volcanic aerosol dataset across the participating models (the 1991-1993 {P}inatubo period from the {CMIP}6-{G}lo{SSAC} dataset). {T}he simulations are conducted within an idealized experimental design where initial states are sampled consistently across models from the {CMIP}6-pi{C}ontrol simulation providing unperturbed preindustrial background conditions. {T}he multi-model ensemble includes output from an initial set of six participating {E}arth system models ({C}an{ESM}5, {GISS}-{E}2.1-{G}, {IPSL}-{CM}6{A}-{LR}, {MIROC}-{E}2{SL}, {MPI}-{ESM}1.2-{LR} and {UKESM}1). {T}he results show overall good agreement between the different models on the global and hemispheric scales concerning the surface climate responses, thus demonstrating the overall effectiveness of {V}ol{MIP}'s experimental design. {H}owever, small yet significant inter-model discrepancies are found in radiative fluxes, especially in the tropics, that preliminary analyses link with minor differences in forcing implementation; model physics, notably aerosol-radiation interactions; the simulation and sampling of {E}l {N}ino-{S}outhern {O}scillation ({ENSO}); and, possibly, the simulation of climate feedbacks operating in the tropics. {W}e discuss the volc-pinatubo-full protocol and highlight the advantages of volcanic forcing experiments defined within a carefully designed protocol with respect to emerging modelling approaches based on large ensemble transient simulations. {W}e identify how the {V}ol{MIP} strategy could be improved in future phases of the initiative to ensure a cleaner sampling protocol with greater focus on the evolving state of {ENSO} in the pre-eruption period.}, keywords = {{PHILIPPINES} ; {PINATUBO} {VOLCAN}}, booktitle = {}, journal = {{G}eoscientific {M}odel {D}evelopment}, volume = {15}, numero = {5}, pages = {2265--2292}, ISSN = {1991-959{X}}, year = {2022}, DOI = {10.5194/gmd-15-2265-2022}, URL = {https://www.documentation.ird.fr/hor/fdi:010084548}, }