On a surface chart, an isobar indicates which of the following?

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Multiple Choice

On a surface chart, an isobar indicates which of the following?

On a surface chart, an isobar marks lines of equal sea-level pressure. The pressures shown are adjusted to sea level so you can compare values across the map. Isobars reveal the pressure field and help identify high and low pressure systems; the closer the isobars are, the stronger the pressure gradient and the stronger the winds tend to be. This line describes pressure, not cloud cover, wind speed, or surface temperature—those are depicted by other map features (wind barbs for speed, isotherms for temperature, etc.).

On a surface chart, an isobar marks lines of equal sea-level pressure. The pressures shown are adjusted to sea level so you can compare values across the map. Isobars reveal the pressure field and help identify high and low pressure systems; the closer the isobars are, the stronger the pressure gradient and the stronger the winds tend to be. This line describes pressure, not cloud cover, wind speed, or surface temperature—those are depicted by other map features (wind barbs for speed, isotherms for temperature, etc.).

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