@article{fdi:010083850, title = {{D}isentangling internal and external contributions to {A}tlantic multidecadal variability over the past millennium}, author = {{F}ang, {S}. {W}. and {K}hodri, {M}yriam and {T}immreck, {C}. and {Z}anchettin, {D}. and {J}ungclaus, {J}.}, editor = {}, language = {{ENG}}, abstract = {{T}he {A}tlantic multidecadal variability ({AMV}) modulates the {N}orth {A}tlantic surface ocean variability and affects decadal climates over the globe; its underlying mechanisms remain, however, under debate. {I}n this study, we use a multi-model ensemble of transient past-millennium (850-1849) and unperturbed preindustrial control simulations contributing to the paleoclimate modeling intercomparison project-phase 4 ({PMIP}4) to decompose the {AMV} signal into the internal {AMV} and the external signal. {T}he internal component of {AMV} exhibits no robust behavior across simulations during periods of major forcing such as strong volcanic eruptions, whereas the external forced temperature responds to volcanic eruptions with an immediate radiative cooling followed, in some simulations, by a sequence of damped multidecadal oscillations. {T}he internal component tightly relates with the {A}tlantic meridional overturning circulation ({AMOC}) and dominates the fluctuations of {AMV}; whereas the external signal has limited impacts on {AMOC} and explains similar to 25% of the {AMV} variance over the past millennium.}, keywords = {{A}tlantic multidecadal variability ; {PMIP}4 ; past1000 ; paleo-climate ; internal variability ; volcano ; {ATLANTIQUE}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {48}, numero = {23}, pages = {e2021{GL}095990 [10 ]}, ISSN = {0094-8276}, year = {2021}, DOI = {10.1029/2021gl095990}, URL = {https://www.documentation.ird.fr/hor/fdi:010083850}, }