句中with结构干什么成分

The traditional view supposes that the upper mantle of the earth behaves as a liquid when it is subjected to small forces for long period and that differences in temperature under oceans and continents are sufficient to produce convection in the mantle of the earth with rising convection currents under the mid-ocean ridges and sinking currents under the continents.

句中with rising convection currents under the mid-ocean ridges and sinking currents under the continents. 干什么成分呢？书中讲解是做produce的方法状语，可我感觉做方法状语理解起来怪怪的，感觉应该是用来补充说明convection的。

谢谢回答

理解为方法状语是对的，以上升的A和下沉的B这种方法产生地幔的对流。