Where can I know the Xiangshan Red Leaf Index?

The Xiangshan Red Leaf Index can be seen on the Xiangshan website. Based on the impact of temperature on red leaves, the discoloration period of red leaves is calculated and released to the public through various media to guide citizens to choose the best time to view red leaves.

The red leaf index*** released is divided into five levels: Level 1 means that it is very suitable for viewing red leaves, and the red leaves in Beijing have basically entered the best viewing period; Level 2 means that it is more suitable to go to mountainous areas with an altitude of more than 200 meters. Appreciating red leaves; Level 3 means it is more suitable for viewing red leaves, and the viewing effect is better in mountainous areas above 400 meters above sea level; Level 4 means it is not suitable for viewing red leaves, cloudy days or sporadic light rain, and the discoloration rate of red leaves is low; Level 5 means it is not suitable Watching the red leaves, there is heavy fog or windy weather, and the mountain roads are slippery.

The impact of temperature on red leaves is very important. Every autumn when the weather turns cold and the temperature drops to a certain level, the synthesis of chlorophyll in the leaves of red-leafed maple species such as ingot maple, loblolly maple, and star maple is blocked, causing the leaves to begin to turn into bright colors such as red, yellow, and orange. Due to seasonal changes, the red leaf index is a particularly seasonal index. It is only released in the golden autumn season and ends in winter.