![]() ![]() The pressure gradient force increases which pushes the thermal wind balance poleward, shifting the position of the westerlies. If temperatures rise in the tropics, or decrease in the poles, then the temperature gradient will steepen. The strong correlations between the temperature gradient and the wind field, as well as the storm track field show that the two are connected, as the theory suggests. The Pacific and Indian Ocean showed in several results to act independently from one another, in temperature gradients, wind field, and storm track position. The independence of behaviours displayed by the ocean sectors led to the research investigating the influences, looking at not just the hemisphere, but also each basin separately. ![]() The strong correlations seen in the high latitudes means that the gradient is driven by the patterns experienced at higher latitudes. In the high latitudes, the southern annual oscillation created a two peaked pattern the mid-latitudes display the expected seasonal mono peak pattern. The temperature gradient is a direct result of the temperature field, and depending on the latitudes you decide in which to constrain your gradient, the gradient experiences several changes. This thesis investigates that theory using the ERA-Interim dataset. One theory is the meridional temperature gradient has a direct impact on the storm track. Theories using physics are taught and published in textbooks to help us understand the connectivity and complexity of such a system. The teleconnections between different variables are verified and used to explain variability in everyday climate and weather. The southern hemisphere’s atmospheric circulation experiences several annual and seasonal changes that are well documented and studied. ![]()
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