The poem describing the humidity in the south is as follows:
1. "Sauvignon Blanc" by Bai Juyi
In September, the west wind blows, and the moon is cold and frosty. Miss you, the autumn night is long, and your soul rises nine times in one night. In February, the east wind comes, and the grass and flowers bloom.
I miss you late in the spring, and my bowels return nine times a day. I live in the north of Luoqiao, and you live in the south of Luoqiao. We met when we were fifteen, and this year we are twenty-three.
Like female dill grass, growing on the side of pine. The vines are short and the branches are tall and bitter, and they can't be lingered on. People say that if everyone has a wish, it will come true in heaven.
I would like to be like a beast in the distance, walking shoulder to shoulder step by step. I would like to be a tree in the deep mountains, with branches connected and healthy.
2. "Ding Fengbo" Su Shi
Don't listen to the sound of beating leaves through the forest, why not scream and walk slowly. Bamboo sticks and mango shoes are easier than horses, who is afraid? A coop of mist and rain will last a lifetime.
The cool spring breeze blows away the drunkenness and is slightly cold. The top of the mountain is shining slantingly but welcomes each other. Looking back to the bleak place where I came from, I go back. There is no rain or shine.
The explanation of Hui Nantian is as follows:
Hui Nantian, also called south wind day, is a weather phenomenon of returning tide, which mainly occurs in southern provinces and regions of my country such as Guangdong, Guangxi, Hainan, and Fujian. . When returning to Nantian, the relative humidity of the air can reach 100%.
In these areas, cold air affects from time to time in March and April every spring, causing the surface temperatures of buildings and other areas to be lower. After the cold air passes, the warm and humid air flow from the ocean quickly "counterattacks", the temperature rises rapidly, and the air humidity increases.
When cold surfaces encounter warm and humid airflow, water droplets will form on floors, walls, etc. This is the same reason why your glasses will immediately fog up when you enter a warm room from a cold outside in winter.