Climate, weather and air. Is the air drier in Guangdong or Hunan?

I study meteorology. Geographically speaking, southern Guangdong is close to the South China Sea, and most of it belongs to the tropical region, which is warm and humid for most of the year. In summer, the warm and humid southeast monsoon blowing from the sea will bring rich water vapor. In winter, due to the blocking of Nanling mountains in southern Hunan, it is difficult for cold air to drive directly down. Summer in Hunan is also affected by summer monsoon, but it is often controlled by subtropical high, that is, it is hot and dry. In winter, it is relatively drier than Guangdong due to the influence of northwest dry and cold airflow and southwest warm and humid airflow. Generally speaking, this is the case, but it is undeniable that Hunan is also in the monsoon region, and the climate is relatively humid.

When the environment and climate change obviously or suddenly suddenly become hot and cold, it is easy to stimulate the nasal mucosa and cause rhinitis.

That's all I know. I hope I can help you.