What is the basis for predicting whether it will rain?

Sailors, farmers and other people who watch the weather for dinner, most of them know how to look for clues about weather changes from some signs in nature. Many proverbs handed down from generation to generation provide ways to predict the weather: from the color of the sky to the feeling of wearing shoes in the morning. Most of the meteorological proverbs circulated among the people are the result of people's long-term observation of natural changes, and the accuracy of weather forecast is quite high. Although people can't detect the subtle changes in the air, they will affect animals and plants. Therefore, the appearance and behavior changes of animals and plants are also favorable clues to predict weather changes.

Meteorological fruit

In the weather forecast of Nature, pine nuts have the highest credibility. On dry days, the scales of pine nuts will be completely open; On the contrary, if the scales of pine nuts are tight, it means it will rain. This is because when the weather is dry, the scales will shrink and stand upright. When the air is humid, the scales will soften due to the absorption of water, and pine nuts will naturally return to their original state.

Grasshopper predictor

Grasshoppers, like many small creatures in nature, are very sensitive to weather changes. As the temperature rises, their calls will become louder and louder. The grasshopper's cry is produced by its hind legs rubbing its hard front wings quickly.

Meteorological seaweed

People who live by the sea often hang bundles of big seaweed outside their houses, because seaweed is one of the best forecasters in nature. When the weather is fine, seaweed will curl and wrinkle and feel very dry. When it is about to rain, seaweed will swell and get wet.

Flowers and trees can report wind and rain.

Animals have always been more sensitive to astronomical phenomena than people. "

Swallows fly low, and rain comes. "High accuracy, there is no difference since ancient times. Besides animals, plants can also forecast the weather. For example, Qinggang Tree, also known as Cyclobalanopsis glauca, is common in the south of China. Because its leaves change with the weather, it is called "meteorological tree". Cyclobalanopsis glauca leaves will change color due to the change of the ratio of chlorophyll and anthocyanin contained in the leaves. After a long drought, just before the rain, chlorophyll synthesis was blocked in hot and muggy days, which made anthocyanins dominant in leaves and the leaves gradually turned red. Some places know that when the leaves turn red, it will rain heavily in this area for a day or two, and after the rain clears, the leaves will turn dark green.

Coincidentally, in Xishuangbanna, Yunnan, there is a flower that can forecast wind and rain, and its scientific name is red calamus lotus. Whenever the wind and rain come, it will be full of vitality and in bud; When the storm comes, it will open quickly, and it is still graceful despite the storm; After the storm, the color is gorgeous, and the bonus is like the sunset, reflecting the mountain cliffs. The local Dai people call it a flower that blooms in the face of ups and downs, and the Dai language calls it "the exotic flower of waxy butterflies".

I don't know if this kind of flower is suitable for the water and soil in the south of the Yangtze River, otherwise it will be transplanted here and raised at home. Everyone will look at the flowers before going out and won't get caught in the rain.

Misgurnus anguillicaudatus: We call it a "barometer". On sunny days, they stay motionless at the bottom of the water and look very quiet. But when the wind and rain come, it will be particularly active, curling up and swimming around, turning around in the water, and stirring up the whole aquarium.

Frog: We call it a "barometer". When the weather is sunny and dry, frogs often stay in wet places. When the air is wet and rainy, it will come to a dry place early.

Jellyfish can capture the information of the coming storm before 15- 15, and calmly hide their bodies in a safe place. It turns out that jellyfish have an "ear" that can feel ultrasonic waves. There is a thin rod at the front end, and there is a ball in the rod. The ball is filled with liquid, and small stones float on it and contact with nerve endings. When the ball receives ultrasonic waves, the jellyfish knows that strong winds are coming, because pebbles are paid to the nerves.

In Siberia, there is also a "hygrometer" chipmunk. In clear weather, if chipmunks run around screaming, dark clouds will soon cover the sky and rain cats and dogs. If chipmunks bark loudly in the morning, it means there will be bad weather at night.