4:00 PM - 4:15 PM
[ACG38-15] Interannual variability of the Atlantic water transport to the Arctic Ocean in a climate model
The utilized climate model is MIROC version 6. The horizontal resolution of the ocean component in the climate model is 0.25 degree, which is higher than that in the standard resolution climate model (1.0 degree). The preindustrial simulation is performed for 700 years after 1000-year spin-up by the low-resolution climate model, and the results in the last 50-year are analyzed in this study.
The narrow West Spitsbergen Current and recirculation of the Atlantic Water in the Fram Strait are well reproduced in our model. The warm Atlantic water is continually transported by eastward boundary current and reaches the Nansen Basin. These results cannot be found in the low-resolution climate model. The Atlantic water recirculation is enhanced by the cyclonic wind anomaly centered at the Nordic Seas. This result is consistent with the previous ocean modeling study (Kawasaki and Hasumi, 2016). The heat transport to the Arctic Ocean is intensified by the anti-cyclonic wind anomaly centered at the Barents Sea. Since the air-sea-ice coupled system acts significantly in the Barents Sea, the role of coupled system on interannual variability of heat transport should be examined. It will be discussed in my presentation by the analysis of results in the ocean-only model.