Research On The Impact Of Arctic Sea Ice Anomaly On The Northern Pacific Storm Track And Its Possible Mechanism During Winter

Using observational data and some statistical methods, we have studied the impact of the Arctic sea ice anomaly in region 90°E—180°—90°W, 40°— 90 °N on the Pacific storm track in the same term during winter. Results show that: when sea ice increases in this region, especially in western part of the sea of Okhotsk , the intensity in northwest—central—southeast part of the storm track strengthens, but the intensity in the northeast part weakerns, and vice versa. Further study demonstrates that there is a close relationship between the sae ice anomaly in the westhern of the sea of Okhotsk and SSTA in the northern Pacific, they can act on the atmospheric temperature and geopotential height fields together, which can influence the jet stream, work on the baroclinity, and finally impact the storm track. Though the impact of sae ice anomaly in westhern of the sea of Okhotsk on the atomosphere is local, it is near the area where storm track generates, and should not be neglected.