| 摘 要： | By using an ageostrophie shallow water model, it is pointed out that a kind of lateral boundary meso-seales jet can be established near the plateau or coast. The charactcristie width of this kind of jet is proportional to the scale of Lc = L(?)C(?)(?),where Lo= Cof is the radius of Rossby deformation, Co= (y*H)the speed of gravity wave and g* the redueced gravity. In general, L(?) is of the order of one hundred kilometers and lens of kilometers in the atmosphere and in the ocean respectively. The large-scale gcostrophic current is an important background condition for forming this kind of jet. From this view point it seems that this kind of atmospheric meso-scale jet only occurs in late spring and summer in the eastern part of Asia, because there is a large-scale south monsoon over there. For the ocean, this kind of meso-scale jct seems to be a semi-persistant syslem and not to show a signilieanl seasonal variation, and it can be established on both sides of the ocean.
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