...Because of the direction of. earth 's rotation, the hurricane has a cyclonic wind circulation which is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. The wind system just above the water surface 'is circular, having an average diameter of about 400 miles...

...air moves in a large, tightening spiral about a center of extreme low pressure. This circulation is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. The hurricane is unique in both structure and strength (see Figures 1 and 2). On the average, the area...

...blowing at speeds of 74 miles an hour or more around a relatively calm center called the eye. It blows counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. The whole storm system may be some 5 to 6 miles high and 300 to 600 miles wide and moves forward, like...

...vortex. S FIGURE 3.18 ^ The principal ionospheric current system, on the Sun side of the Earth, flows counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. The currents are enhanced at the magnetic dip equator. All currents are more intense in the summer months...

...taken, I in pencil. о in lemon, u in circus. 1238 low low barometric pressure; cyclone: Winds in a low rotate counterclockwise in the Northern Hemisphere [and] clockwise in the Southern Hemisphere (James E. Miller). 4a the lowest trump card in certain games, b the lowest score, number, or rank,...

...ultimately due to the rotation of the EARTH. It is the Coriolis effect that makes the air in storms rotate counterclockwise in the northern HEMISPHERE and clockwise in the southern hemisphere. cosmic microwave background The MICROWAVE RADIATION that arrives at the EARTH from every direction...

...tidal behaviour. The Coriolis force (due to the rotation of the earth) causes the standing wave to rotate counterclockwise in the northern hemisphere and clockwise in the southern hemisphere, so that the standing tide (a Kelvin wave) rotates around a node that is called an amphidromic point....

...extreme low pressure with winds that exceed 1 19 km/h (74 mph or 64 knots) are called hurricanes. They rotate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. Hurricanes are called by different names in different parts of the world: cyclones in the Indian Ocean,...

...component. The lines in this map are cotidal lines that converge on nodes. Notice that the rotary waves rotate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere because of Coriolis deflection. Also, unlike in our idealized amphidromic system of Figure 8-9b, the...

...hurricane are summarized in Figure 2.8. Air spirals in toward the eyewall in the lowest kilometer or so, counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. The spiral becomes tighter and tighter near the eyewall, as the wind speed increases to hurricane force....