00:52 初冬时节，福建省三明市尤溪县中仙镇龙门场的百亩古银杏林迎来了观赏季，吸引了不少游客前去露营、打卡。 新媒体编辑：汪峰 黄传莉 制片人：马宝军 策划：李琳 张青 杜屹然 统筹：汪峰 陶玲君 编导：邱俊松 记者：林凯 报道员：严良钤 走进林间，金黄的银杏层林尽染，古树古村落错落有致，小巷里石瓦间，置身其中仿佛在画中行走。 ...

Group 1 - The article highlights that starting from tomorrow, the ginkgo leaves in Beijing will enter their best viewing period, showcasing a picturesque autumn landscape [1] - The scenery features golden ginkgo leaves, red ancient walls, and historical stories from thousand-year-old trees, making it a must-see this autumn [1] Group 2 - The article mentions specific locations for viewing ginkgo trees, including the oldest ginkgo tree and an avenue lined with over 200 ginkgo trees [3] - It notes that the entrance fee for certain locations is free, while others charge 6 yuan, indicating a mix of accessibility for visitors [3] - An event called the Ditan Ginkgo Festival will be held starting this Saturday, featuring cultural and creative activities [3]

Core Viewpoint - The article provides a guide for viewing ginkgo trees in Beijing, highlighting the impact of microclimate conditions on the color change of ginkgo leaves and offering a timeline for optimal viewing periods. Group 1: Viewing Periods - Initial viewing period for ginkgo trees in urban and suburban areas is marked by a color change rate of 30-60%, expected around November 1 [4] - The best viewing period for urban and nearby suburban areas is from November 1 to November 10, with a color change rate of 60-80% [5] - In mountainous and remote areas, the viewing period has already ended, with most leaves having fallen [5] Group 2: Meteorological Influences - The arrival of cold air and the extent of temperature drop are the main meteorological factors affecting the start of ginkgo leaf color change [6] - Leaf color change accelerates when temperatures drop to between 5°C and 0°C, and leaves are prone to falling when temperatures drop below 0°C [7] - Strong winds (5-6 level) can cause leaves to fall within a day, while heavy rain or snow can also accelerate leaf drop [13][14] Group 3: Tree Size and Leaf Change - Smaller ginkgo trees change color earlier due to less developed root systems, leading to earlier yellowing and leaf drop compared to larger trees [8] - Larger ginkgo trees, being robust, typically follow normal leaf drop patterns based on temperature [10]

Core Viewpoint - The article provides a guide for viewing ginkgo trees in Beijing, highlighting the impact of microclimate conditions on the color change of ginkgo leaves and offering a timeline for optimal viewing periods. Group 1: Viewing Periods - Initial viewing period for ginkgo trees in urban and suburban areas is marked by a color change rate of 30-60%, expected to occur before November 1 [4] - The best viewing period for urban and nearby suburban areas is from November 1 to November 10, with a color change rate of 60-80% [5] - After November 10, the viewing period in urban areas will see significant leaf drop, while mountainous and remote areas will have concluded their viewing period [5] Group 2: Meteorological Influences - The arrival of cold air and the extent of temperature drop are key meteorological factors influencing the onset of ginkgo leaf color change [6] - Leaf color change accelerates when temperatures drop to between 5°C and 0°C, and leaves are prone to falling when temperatures drop below 0°C [7] - Strong winds (5-6 level) can cause all leaves to fall within a day, while heavy rain or snow can also accelerate leaf drop [13][14] Group 3: Tree Size and Leaf Change - Smaller ginkgo trees change color earlier due to less developed root systems compared to larger trees [8] - Larger ginkgo trees, being robust, tend to shed leaves according to normal temperature patterns [10]