Torricelli Jet streams are fast flowing, narrow air currents found in the upper troposphere. In meteorology, the polar front is the boundary between the polar cell and the Ferrel cell in each hemisphere. At this boundary a sharp gradient in temperature occurs between these two air masses, each at very different temperatures. The polar front arises as a result of cold polar air meeting warm tropical air. Polar Front Jet Stream The wind system of the Earths troposphere exists because of the unequal intensity of solar radiation (because of Earths curved surface) and direction to the rotation of the Earth. Coriolis deflects winds to the right in Northern Hemisphere and to the left in the southern Hemisphere. FRONT= Drummer and Flag people Air mass = army behind the front Warm Air mass Warm Front 4 https://prezi.com/-8gof4d97cva/wicked-weather/