As a result, the KE latitude showed a positive trend (Fig. 2 a): the KE migrated northward by approximately 210 km from 1993 to 2021 (7.20 km year −1 , exceeding the significance level of 0.05) with decadal-scale fluctuations.
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As a result, the KE latitude showed a positive trend (Fig. 2 a): the KE migrated northward by approximately 210 km from 1993 to 2021 (7.20 km year −1 , exceeding the significance level of 0.05) with decadal-scale fluctuations.