On a weather map marked "high" indicates high? I think it is air pressure. Is this right?
Usually, yes. However some maps show the high temperatures for the day.
Thank you
Yes, you are correct! On a weather map, the term "high" typically refers to a high-pressure system. High-pressure systems are areas where the atmospheric pressure is higher than the surrounding regions.
To understand why it indicates air pressure, we need to have a basic understanding of how weather works. Air pressure is the force exerted by the weight of the air molecules above a particular area. High-pressure systems are characterized by descending air, where air is sinking and pushing down on the Earth's surface. This sinking air creates a region of relatively high atmospheric pressure.
On a weather map, high-pressure systems are often denoted with a capital "H." These systems are associated with fair weather conditions, such as clear skies, calm winds, and generally dry conditions. In contrast, low-pressure systems (marked with a capital "L") are associated with rising air and lower atmospheric pressure, which often leads to more unsettled weather conditions like clouds, rainfall, and stronger winds.
So, when you see a "high" marked on a weather map, it indicates the presence of a high-pressure system, suggesting stable and generally fair weather in that particular area.