Preliminary studies on ITCZ show that the displacement of this system can play an undeniable role in the climate of tropical regions as well as in surrounding areas. The purpose of this study is to investigate the annual ITCZ movement in the Indian Ocean and East Africa region and to select the appropriate and reliable index for ITCZ positioning. To conduct this research, the ERA-interim reanalysis gridded data from the European Centre for Medium-Range Weather Forecasts (ECMWF) was used to determine the location and spatial displacement of the ITCZ. The results showed that the HCC index is the appropriate index to detect the annual ITCZ displacement in all months of the year. The SH and P indices were in second place in terms of importance and accuracy in identifying the behavior and spatial displacement of the ITCZ system. The TCWV index has been a weak index to detect the ITCZ annual location and displacement. During the three months of winter, the ITCZ bends off the east coast of Africa to the southern latitudes and enters the waters of the Indian Ocean along the northwest-southeast. In the other words, the average ITCZ position on land is about 5˚–6˚ north latitude over the waters of the Indian Ocean. On the contrary, from April to the end of September, in the range of 30˚–50˚ E (Sudan), the ITCZ bends and extends to the northeast. During the summer months, this northward movement sometimes reaches up to 20˚.

对ITCZ的初步研究表明，该系统的位移在热带地区以及周边地区的气候中可以发挥不可否认的作用。这项研究的目的是调查印度洋和东非地区的ITCZ年度运动，并为ITCZ定位选择适当和可靠的指标。为了进行这项研究，使用了来自欧洲中距离天气预报中心（ECMWF）的ERA中期再分析网格数据来确定ITCZ的位置和空间位移。结果表明，HCC指数是检测一年中所有月份的年度ITCZ位移的合适指数。在确定ITCZ系统的行为和空间位移的重要性和准确性方面，SH和P指数位居第二。TCWV指数是检测ITCZ年度位置和位移的弱指数。在冬季的三个月中，ITCZ从非洲的东海岸弯曲到南部的纬度，并沿着西北东南方向进入印度洋的水域。换句话说，在印度洋水域，ITCZ在陆地上的平均位置约为北纬5˚–6˚。相反，从4月到9月底，东经ITCZ在30˚–50˚ E（苏丹）范围内弯曲并向东北延伸。在夏季，这种向北运动有时可达20度。换句话说，在印度洋水域，ITCZ在陆地上的平均位置约为北纬5˚–6˚。相反，从4月到9月底，东经ITCZ在30˚–50˚ E（苏丹）范围内弯曲并向东北延伸。在夏季，这种向北运动有时可达20度。换句话说，在印度洋水域，ITCZ在陆地上的平均位置约为北纬5˚–6˚。相反，从4月到9月底，东经ITCZ在30˚–50˚ E（苏丹）范围内弯曲并向东北延伸。在夏季，这种向北运动有时可达20度。