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Impact of Indonesian throughflow blockage on the southern Indian Ocean

机译:印尼通流阻塞对印度洋南部的影响

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The present study deals with the numerical simulation of the Indonesian throughflow (ITF) via three major passages, namely Lombok strait (115 degree E, 8 degree S), Savu strait (122 degree E, 9 degree S) and Timor strait (128 degree E, 11 degree S), its seasonal variability and impact on the sea surface parameters due to its blockage. The model is initialized with the Levitus-94 climatological dataset for annual mean temperature and salinity fields, and is forced by the seasonal and yearly varying da Silva SMD 1994 and Hellerman and Rosenstein wind datasets. The spin-up of the model has been carried out separately for open and closed Indonesian channels using both the surface wind climatologies. Numerical simulations confirm that the ITF is mainly towards Indian Ocean in a year. It has been observed that surface winds have an impact on the phase as well as magnitude of the ITF. The net effect of blockage is reduction in temperature of the Southern Indian Ocean and no significant change is seen in surface salinity.
机译:本研究通过三个主要通道对印尼通流(ITF)进行了数值模拟,即龙目岛海峡(115度E,8度S),萨武海峡(122度E,9度S)和帝汶海峡(128度)。 E,11度),其季节性变化以及由于阻塞而对海面参数的影响。该模型使用Levitus-94气候数据集(用于年平均温度和盐度场)进行初始化,并由季节性和年度变化的da Silva SMD 1994和Hellerman和Rosenstein风数据集强制执行。使用两种地面风气候,分别针对开放和封闭的印尼河道分别进行了模型的旋转。数值模拟证实,ITF在一年内主要面向印度洋。已经观察到,表面风对相位以及ITF的大小都有影响。阻塞的最终结果是南印度洋温度降低,表面盐度没有明显变化。

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