大圆路径 meaning in English

great circle path

There is significant difference between interannual variation of the rainfall in march and that in april and may , the main cause of affecting interannual variation of the rainfall in march possibly is that the energy excitated by sst anomaly in the area which is from equatorial indian ocean to bengal gulf spreads along with big cicular route
华北3月降水的年际变化和4 、 5月份显著不同，赤道印度洋到孟加拉湾一带海温异常激发的rossby波的能量沿着大圆路径传播，可能是影响华北3月降水的年际变化的主要原因。冷空气活动以及低空急流的年际变化是华北4月降水年际变化的重要原因。