cross-shelf current 具体是什么海流哇,和沿岸流有啥区别呀

cross-shelf current,应当是指横穿陆架流动的水流,正如下面一段所描述的：As such,currents that cross the isobaths of the continental shelf are usually of great interests,because these currents play an important role in inducing material exchange between the inner shelf and the open oceans.沿岸流,就陆架海域而言,通常是指那些接近海滨、流向与海滨平行的“海流”.因此,以我个人的理解,上述两种流最大的区别在于：水流流动的方向与等深线延伸的方向之间的角度关系不同——沿岸流有顺着等深线流动的趋势,而cross-shelf current是横切等深线流动的.