Compared with the low pressure control area, the temperature difference between day and night in the area controlled by the high pressure center is smaller. What is the reason?

Compared with the low-pressure control area, the temperature difference between day and night in the high-pressure central control area is smaller.

There are many updrafts and rainy weather in the area controlled by the low pressure center. Clouds turn cloudy during the day, and clouds have a strong weakening effect on solar radiation. The sun's heat reaching the ground is less, and the temperature is lower than that in sunny days. Cloudy at night, clouds can strongly absorb ground radiation, enhance atmospheric inverse radiation and give more heat to the ground. The temperature near the ground is higher than that on a clear night, and the temperature difference between day and night is smaller.

Under the control of the high pressure center, the airflow sinks, forming sunny weather. During the day, the atmosphere has a weak weakening effect on solar radiation, and the temperature is higher. At night, the atmospheric heat preservation is weak, the temperature is low, and the temperature difference between day and night is large.