Under the barotropic and non-divergent conditions, the barotropic instability at the discontinuous surface between the easterly and the westerly current in the tropical latitude is investigated.

• 在正压无辐散的条件下,讨论了东、西风不连续面上的正压不稳定性,得出:在这种情形下,东、西风界面上的扰动总是不稳定的。