Interannual and decadal variations of shallow meridional overturning cells in the Indian Ocean

利用高分辨率海洋环流模式和一系列简化数值模式的敏感性研究结果，研究了印度洋浅水纬向翻转单体的年代际变化及其可能机制。原来，南部的热带细胞分为两部分。10°S以北的北方部分受印度洋风应力旋度变化的影响较强，在90年代（2000年代）减弱（加强）。另一方面，南部10°S-30°S之间的部分在1990年代（2000年代）增强（减弱）。印度尼西亚的贯穿流可能是影响南方热带环流圈南部变化的重要因素。

Decadal variations of shallow meridional overturning cells in the Indian Ocean and their possible mechanisms are investigated using results from a high-resolution ocean general circulation model and a series of sensitivity studies with simplified numerical models. It turns out that the southern tropical cell is divided into two parts. A northern part, north of 10°S, is strongly affected by variations of wind stress curl over the Indian Ocean and weakened(strengthened) during 1990s(2000s). On the other hand, a southern part between 10°S and 30°S strengthened(weakened) during 1990s(2000s). The Indonesian throughflow may be an important factor affecting the variations in the southern part of the southern tropical cell.