External edge changes of the seasonal carcolation of the southern hemisphere Hadley cell in the tropical belt
In this study, the data of (ECMWF) version (ERA5) with spatial resolution of 0.25 * 0.25 degrees and a period of 40 years (1979-1989) of the meridional performance flow function Seasonal changes in the external edge of the Hadley cell in the Northern Hemisphere have been investigated using MATLAB. Findings showed that the outer edge of Hadley cell in winter from 35 to 38 degrees south, in spring from 29 to 32 degrees south, in autumn from 30 to 35.5 degrees South and can be seen in summer from 28 to 29 degrees south; Also, with increasing each year, the outer edge of the Hadley cell in winter, autumn, spring and summer increases by -0.039, -0.048, -0.014 and -0.012 degrees on average. In general, the results show that the expansion of the outer edge of the Hadley cell has increased by 2 to 3.5 degrees latitude in winter and autumn, and shows that it is very prominent compared to the summer and spring seasons. Shows the expansion of the Hadley cell rotation towards higher latitudes.
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