为什么秋天的树叶会变色
Why Leaves Change Color in Fall
English preview
Why Leaves Change Color in Fall
A short NASA explainer on chlorophyll, pigments and the weather behind autumn color
With temperatures dropping in the northern hemisphere, fall colors have swept across the Mid-Atlantic.
The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this natural-color image on October 22, 2012.
The brownish-red areas in the Appalachians are hardwood forests dominated by oaks; the yellower shades in the Delmarva Peninsula are evidence of corn or soybean crops, not fall foliage.
中文精读预览
为什么秋天的树叶会变色
美国宇航局关于叶绿素、色素以及秋色背后天气因素的简短解说
随着北半球气温下降,秋色已席卷大西洋中部地区。
美国宇航局Aqua卫星上的中分辨率成像光谱仪(MODIS)于2012年10月22日拍摄了这幅自然色图像。
阿巴拉契亚山脉中呈棕红色的区域是以橡树为主的阔叶林;德尔马瓦半岛上偏黄的色调则表明那里是玉米或大豆作物,而非秋叶。