@article{fdi:010055869, title = {{S}tability of weather regimes during the last millennium from climate simulations}, author = {{Y}iou, {P}. and {S}ervonnat, {J}. and {Y}oshimori, {M}. and {S}wingedouw, {D}. and {K}hodri, {M}yriam and {A}be-{O}uchi, {A}.}, editor = {}, language = {{ENG}}, abstract = {{T}he variability of the extra-tropical atmospheric circulation and its potential dependence on external forcings have been debated topics in climate modeling and observation communities. {A} recent reconstruction of the {N}orth {A}tlantic {O}scillation {I}ndex has argued that the {M}edieval {W}arm {P}eriod period yielded a persistent positive phase of this index in contrast with an oscillating mode during the {L}ittle {I}ce {A}ge. {T}his paper tests whether this feature can be obtained, in millennium simulations from three different climate models. {W}e examine the daily atmospheric dynamics that drives the main modes of extra-tropical variability. {W}e find that the transition from a {M}edieval {W}arm {P}eriod to a {L}ittle {I}ce {A}ge in the {N}orth {A}tlantic does not imply changes in patterns or frequency of weather regimes, although the mean surface temperature change is significant. {T}his implies that the interpretation of proxy records in terms of atmospheric variability should be revised in order to take into account the structure of daily meteorological patterns, and/or climate models are too constrained to infer large changes of atmospheric variability. {C}itation: {Y}iou, {P}., {J}. {S}ervonnat, {M}. {Y}oshimori, {D}. {S}wingedouw, {M}. {K}hodri, and {A}. {A}be-{O}uchi (2012), {S}tability of weather regimes during the last millennium from climate simulations, {G}eophys. {R}es. {L}ett., 39, {L}08703, doi: 10.1029/2012{GL}051310.}, keywords = {}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {39}, numero = {}, pages = {{L}08703}, ISSN = {0094-8276}, year = {2012}, DOI = {10.1029/2012gl051310}, URL = {https://www.documentation.ird.fr/hor/fdi:010055869}, }