上张1月29日外国卫星拍的中国照片。
提示：橘红色的是雪，白色或者桃色的是云，蓝绿色——bare land ，没有雪。
相关数据：
| | Date Acquired: | 01/29/2008 |
| | | | Credit: | Jesse Allen, Earth Observatory |
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说明：
Though the days may be different, gathering with family and friends for major holidays is the same the world over. China’s biggest holiday, the Lunar New Year, prompts a mass migration (the largest on the planet, said BBC News) as tens of millions travel home. In 2008, however, travel proved nearly impossible. Snow storms closed roads and railroads across eastern, central, and southern China, reported BBC News.
This image, captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on the morning of January 29, 2008, shows how extensive the unusual snow cover is. The image encompasses most of eastern China, save the northernmost provinces and the cloud-covered southern coast. From north to south, nearly the entire country is covered in snow.
Unlike a photo, which uses the visible light that the human eye sees, this image includes both infrared light and visible light to provide a contrast between snow and clouds. Snow is red-orange, while clouds are white and peach. Some of the worst-affected provinces, such as Guangdong along the southern coast, were still under cloud cover when MODIS captured this image. Other areas, such as the North China Plain (where Beijing is located), are snow-free. The ground is green-blue, the shade of bare or sparsely vegetated earth in this type of image.
The snow storms started on January 10, spreading snow over 14 provinces and affecting approximately 80 million people, said BBC News on January 29. The snow destroyed crops and homes and led to power outages, BBC said. Coal shortages, made worse by the difficulty of transporting coal on snowy roads, caused additional power outages. Some of the more severely affected provinces are labeled in this image. These provinces are in the south, where snow is unusual.
西陆社区的翻译（不完全版本，原文的政治倾向性十足）：
像许多其他国家一样，无以计数的人在农历新年返乡与家人团聚。但今年大多数的中国人被困在返乡之路上：几乎整个中国都被大雪笼罩着。
美国宇航局Terra地球观测卫星周二拍摄到的照片充分显示了中国的恶劣天气：由南到北的中国大城市密集的东部地区几乎全被大雪覆盖，反色照片上红色的区域都是大雪肆虐的地区，白色区域表示的是密布的云层。与以人眼感光为基础的普通照片不同，为了区别降雪与云层，这张卫星图片是既在可视光领域又在红外线范围拍摄的。
在大雪肆虐的地区，如广东省，依旧笼罩着厚厚的云层。只有少数地区根本没下雪，如首都北京，在卫星图片上小部分的蓝绿色区域
翻译来源：http://club.xilu.com/emas/msgview-821955-690732.html
图文来源：http://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2008-01-31
大图（4.6MB，Resolutions:250m ）
[ 本帖最后由 Eldghost 于 2008-2-3 23:06 编辑 ] |
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