Final answer:
Changes in air pressure at a locality over time are influenced by changes in temperature, humid conditions, and the movement of air masses. Warmer temperatures and more humid conditions typically lower air pressure while cooler temperatures increase it. The movement of air masses can also cause changes in local air pressure.
Step-by-step explanation:
Changes in air pressure with time at a particular locality may be explained by various factors such as changes in temperature, humid conditions, and the movement of air masses. When the temperature rises, the air expands causing a decrease in pressure, often resulting in warmer, less dense air. In contrast, cooler temperatures cause the air to contract, resulting in an increase in pressure. Humid conditions also impact air pressure as moist air is lighter than dry air, contributing to lower pressure.
Moreover, movement of air masses also plays a major role, with high-pressure systems (cooler, denser air sinking) and low-pressure systems (warmer, less dense air rising) sweeping across localities and inducing changes in pressure.
Learn more about Air Pressure