%0 Journal Article %T Delayed North Atlantic Response to Solar Forcing of the Stratospheric Polar Vortex %+ Meteorological Research Institute [Tsukuba] (MRI) %+ Institute for Space-Earth Environmental Research [Nagoya] (ISEE) %+ STRATO - LATMOS %A Yukimoto, Seiji %A Kodera, Kunihiko %A Thiéblemont, Rémi %< avec comité de lecture %J SOLA %I Meteorological Society of Japan %V 13 %P 53-58 %8 2017 %D 2017 %R 10.2151/sola.2017-010 %Z Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] %Z Sciences of the Universe [physics]/Ocean, AtmosphereJournal articles %X A delayed response of the winter North Atlantic oscillation (NAO) to the 11-year solar cycle has been observed and modeled in recent studies. However, the mechanisms creating this 2−4- year delay to the solar cycle have still not been well-understood. This study examines the effects of the 11-year solar cycle and the resulting modulation in the strength of the winter stratospheric polar vortex. A coupled atmosphere–ocean general circulation model is used to simulate these effects by introducing a mechanis- tic forcing in the stratosphere. The intensified stratospheric polar vortex is shown to induce positive and negative ocean temperature anomalies in the North Atlantic Ocean. The positive ocean tem- perature anomaly migrated northward and was amplified when it approached an oceanic frontal zone approximately 3 years after the forcing became maximum. This delayed ocean response is similar to that observed. The result of this study supports a previ- ous hypothesis that suggests that the 11-year solar cycle signals on the Earth’s surface are produced through a downward penetration of the changes in the stratospheric circulation. Furthermore, the spatial structure of the signal is modulated by its interaction with the ocean circulation. %G English %2 https://insu.hal.science/insu-01576591/document %2 https://insu.hal.science/insu-01576591/file/13_2017-010.pdf %L insu-01576591 %U https://insu.hal.science/insu-01576591 %~ INSU %~ UPMC %~ CNRS %~ LATMOS %~ GIP-BE %~ UVSQ %~ UNIV-PARIS-SACLAY %~ UVSQ-SACLAY %~ UPMC_POLE_3 %~ SORBONNE-UNIVERSITE %~ SU-SCIENCES %~ UVSQ-UPSACLAY %~ SU-TI %~ GS-ENGINEERING %~ GS-PHYSIQUE %~ INSTITUT-SCIENCES-LUMIERE %~ ALLIANCE-SU