Final answer:
Thermal lows refer to low-pressure systems created by significant increases in air temperatures, often resulting in summer heatwaves over regions. They are part of larger atmospheric circulation patterns driven by the movement of hot and cold air masses.
Step-by-step explanation:
Thermal lows are areas of low pressure circulation created by significant increases in air temperature. These conditions often result in summer heatwaves over certain regions. In meteorology, low-pressure systems occur when the earth's surface atmospheric pressure is lower than that in the surrounding environment, causing moist air to rise and condense, thus forming clouds and potentially initiating weather events. Atmospheric circulation is a key concept here, where the large-scale flow of hot and cold air masses shape climate patterns. Hot air from the tropics rises and moves toward the poles, while cold air from the poles flows toward the tropics, driven by both temperature differentials and the Earth's rotation.