Temperature is related to the random movement of molecules. If the number of molecules is greater, the random motion of the molecules will be stronger, and therefore the temperature will be higher. Because the air in the mountains is thin, there are fewer molecules in the air. This creates a temperature difference between the mountains and the mountains. So there is a saying that "the beauty of April in the world is gone, and the peach blossoms in the mountain temple are beginning to bloom."
Mountain Vertical Climate and Poetry "Peach Blossoms in Dalin Temple" by Bai Juyi of the Tang Dynasty: "The beauty of April in the world is gone, and the peach blossoms in the mountain temples are beginning to bloom. I have always regretted that I can't find a place to return to in spring, and I don't know where to turn." ". Vividly reflects the decrease in temperature with increasing altitude, and the vertical difference in phenology in mountainous areas. Generally, the temperature decreases by 0.6℃ for every 100 meters of altitude increase. The altitude of Dalin Temple in Lushan is between 1,100 and 1,200 meters, which is higher than The temperature in "Human World" (the flat land of Jiujiang City, with an average altitude of 32 meters) is about 6℃ lower. Therefore, the blooming time of peach blossoms is 20 to 30 days behind, so the phenology on the mountain is about a month later than the phenology at the bottom. Time.