What do isobars represent on a weather map?
Isobars are lines of constant or equal pressure on a weather map. They can be used to find areas of low or high pressure over a broad area (like the U.S.), and they can tell us how intense the system may be.
What do isobars represent on a map quizlet?
Isobars are lines on a map that connect places of equal air pressure. The spacing of isobars indicates the amount of pressure change occurring over a given distance. These pressure changes are expressed as the pressure gradient. Closely spaced isobars indicate a steep pressure gra- dient and high winds.
What is isobar line?
Isobar (meteorology), a line connecting points of equal atmospheric pressure reduced to sea level on the maps. Isobaric process, a process taking place at constant pressure.
What do isobars represent what can we infer from them?
Isobars are lines/areas of equal pressure represented on a weather map. When isobars become very tightly grouped together it indicates a "tight pressure gradient" (steep slope). The tightly packed isobars are due to the difference in air pressure between between High and Low pressure systems.
How are isobars used on maps?
An isobar is a line on a map that shows a meteorologist what the pressure is at the surface of the earth. They are lines that connect equal points of pressure. Isobars can be used to map atmospheric or air pressure in a way that makes it easier to understand.
How do isobars indicate wind direction?
Widely spaced isobars, portray a flat or weak pressure gradient, resulting in light winds. Isobars also determine wind direction, with winds blowing clockwise around highs and counterclockwise around lows in the Northern Hemisphere.
What are lines on a weather map connecting places of equal air pressure called?
A line drawn on a weather map connecting points of equal pressure is called an "isobar". Isobars are generated from mean sea-level pressure reports and are given in millibars.
What do closely spaced isobars indicate about wind?
The closer the spacing of isobars, the stronger is the pressure gra- dient force. The stronger the pressure gradient force, the stronger is the wind. Thus, closely spaced isobars mean strong winds; widely spaced isobars mean lighter wind.
What does isobar mean in weather?
places of equal pressure Isobars are lines on a weather map that join places of equal pressure. Meteorologists collect information from weather stations, buoys and ships and then draw smooth curves to join the dots. Image courtesy of the Bureau of Meteorology.
What does isobar mean in geography?
of constant barometric pressure isobar, line on a weather map of constant barometric pressure drawn on a given reference surface. The isobaric pattern on a constant-height surface is extremely useful in weather forecasting because of the close association between pressure and weather.
How do isobars indicate wind speed?
The stronger the pressure gradient force, the stronger is the wind. Thus, closely spaced isobars mean strong winds; widely spaced isobars mean lighter wind. From a pressure analysis, you can get a general idea of wind speed from contour or isobar spacing.
Do isobars indicate wind?
Widely spaced isobars portray a weak pressure gradient typical of light wind situations. Isobars also determine wind direction. Winds in the Northern Hemisphere blow clockwise around highs and counterclockwise around lows.
What is an isobar in geography?
isobar, line on a weather map of constant barometric pressure drawn on a given reference surface. The isobaric pattern on a constant-height surface is extremely useful in weather forecasting because of the close association between pressure and weather.
Do isobars indicate wind speed?
The stronger the pressure gradient force, the stronger is the wind. Thus, closely spaced isobars mean strong winds; widely spaced isobars mean lighter wind. From a pressure analysis, you can get a general idea of wind speed from contour or isobar spacing.
How do isobars predict weather?
Wind blows from areas of high to low pressure. The greater the contrast in pressure difference between two areas, the faster the wind will blow, so closer isobars on a weather map predict higher velocity winds.