It is a basically low pressure belt encircling Earth near the Equator. Low pressure area or a ‘low’, is a region where the atmospheric pressure is lower than the surrounding areas but at the same level. Please answer these 5 Science questions (BE SERIOUS) 1. It's a general rule of meteorology that when air rises, it cools and condenses. A high pressure system has higher pressure at its center than the areas around it. Why global surface winds from around 30 degrees latitude don't blow directly from the north or south toward the Equator? At 60 degrees, the air is warmer, resulting in a low-pressure system. Swirling in the opposite direction from a low pressure system, the winds of a high pressure system rotate clockwise north of the equator and counterclockwise south of the equator. Winds blow away from high pressure. What names of these generally steady winds? About 2000 miles from the equator, the air falls back to Earth's surface blowing towards the pole and back to the equator. Notice the alternation between high-pressure and low-pressure areas. Another way to say the same thing is that the warm air rises, causing an area of lower air pressure below. Here, we are giving the concept, causes and impact of ITCZ (Intertropical Convergence Zone) for general awareness. At 30 degrees, the air is cooler than it is at the equator, creating a high-pressure system. Low Pressure Typically Equals Unsettled Weather . Question: Why is the equator a low pressure area. What does an increased pulse rate indicate about the heart rate and flow of blood in someone’s body? These trade winds originate over the warm tropical ocean in the Southern hemisphere. -Precipitation can occur in several forms: ... -Most common in the low latitudes along the ITCZ where air from the northern and southern hemispheres converges. Areas closer to the equator such as south America middle Africa or southeast from GPHY 102 at Queens University. But because the Earth rotates, circulating air is deflected. At the surface, low pressure systems have a counterclockwise rotation in the Northern Hemisphere, with the wind turning slightly inward towards the lowest pressure. Since the converging air has nowhere else to go, it … The air eventually stops rising and spreads north and south towards the Earth's poles. Lines or isobars on the weather charts represent the presence or absence of any low pressure area. This is why low pressure area of the ITCZ tends to be cloudy. If the Earth did not rotate and remained stationary, the atmosphere would circulate between the poles (high pressure areas) and the equator (a low pressure area) in a simple back-and-forth pattern. After crossing equator, these blow in the South-West direction entering peninsula as South-West monsoon. What is this area called? Rising warm air; doldrums. It is very hot at the equator and the warm air creates a low-pressure area once again. Why does the atmosphere near the Equator form a belt of low pressure? Because this air moves up and away from the surface, there is less air left near the surface. The warm, moist air over the ocean rises upward from near the surface. The low-pressure area over the Northern plains intensifies by mid-June and attracts the trade winds. It is a zone of convergence where the trade winds meet. Winds blow away from high pressure. This is why low-pressure areas are always accompanied by a warm front and cold front; the differing air masses are responsible for creating the low center. That is why they form only over warm ocean waters near the equator. A low pressure area forms at the surface and a region of clouds forms at altitude. This causes air to converge, or come together, at the center of the low near the ground.

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