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Jhenrique
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1st which is the math definition for circulation (##\Gamma = \int_s \vec{f}\cdot d\vec{s}##)? And 2nd, what means positive, null and negative circulation?
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HallsofIvy said:Physically, it is the total motion around the axis (the line through the center of the circle and perpendicular to it).
chogg said:What circle?
Doesn't the expression make sense for arbitrary paths? Or, for that matter, arbitrary dimensions, so that the concept of "axis" won't necessarily make sense?
HallsofIvy said:"positive circulation" means the circulation is in the counterclockwise direction, "negative circulation" is in the clockwise direction, and "null circulation" means there no net rotational motion.
Circulation is the movement of something, such as air or water, in a circular pattern. In terms of weather, it refers to the movement of air in the atmosphere. Understanding circulation is important because it helps us predict weather patterns and understand how different factors, such as temperature and pressure, can impact the movement of air.
Positive circulation, also known as cyclonic circulation, occurs when air moves in a counterclockwise direction in the Northern Hemisphere and clockwise in the Southern Hemisphere. This type of circulation is associated with low-pressure systems and often brings stormy weather.
Null circulation, also known as anticyclonic circulation, occurs when air moves in a clockwise direction in the Northern Hemisphere and counterclockwise in the Southern Hemisphere. This type of circulation is associated with high-pressure systems and often brings clear and calm weather.
Negative circulation, also referred to as meridional circulation, occurs when air moves in a north to south or south to north direction. This type of circulation is often associated with extreme weather events, such as heat waves or cold snaps.
The type of circulation present in a given region can greatly impact the weather patterns in that area. For example, positive circulation can bring storms and precipitation, while null circulation can bring clear and calm weather. Negative circulation is often associated with extreme weather events, but can also bring a mix of different weather conditions depending on the specific factors at play.