File:Harmful Bloom in Lake Atitlán, Guatemala.jpg
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原始文件 (1,800 × 1,200像素,文件大小:2.28 MB,MIME类型:image/jpeg)
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摘要[编辑]
描述Harmful Bloom in Lake Atitlán, Guatemala.jpg |
English: A large bloom of cyanobacteria, more commonly known as blue-green algae, spread across the lake in green filaments and strands that are clearly visible in this simulated-natural-colour image. According to local news reports, the nutrients feeding the bloom in Lake Atitlán come from sewage, agricultural run off, and increased run off as a result of deforestation around the lake basin. The image reveals clearly why run-off would end up in the lake. Mountains and volcanoes encircle Lake Atitlán, ensuring that all rain that falls in the basin flows into the bowl-like lake. Silver-gray settlements, another source of pollution, ring the lake. Deforestation is a little bit more difficult to see. The forest is a darker shade of green than agricultural fields. The contrast between forested land and agriculture is most evident on the slopes of the San Pedro Volcano on the south-west shore of the lake. Large pale green squares cut into the dark green crown over the peak of the volcano. |
日期 | |
来源 | NASA Earth Obsevatory |
作者 | Jesse Allen |
Image captured by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite. Image based on data from the NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team. Instrument: Terra - ASTER.
许可协议[编辑]
Public domainPublic domainfalsefalse |
本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zh、NASA版权方针页面或JPL图片使用方针。) | ||
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San Pedro Volcano
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当前 | 2009年11月30日 (一) 12:38 | 1,800 × 1,200(2.28 MB) | Originalwana(留言 | 贡献) | {{Information |Description={{en|1=A large bloom of cyanobacteria, more commonly known as blue-green algae, spread across the lake in green filaments and strands that are clearly visible in this simulated-natural-colour image. According to local news repor |
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图像标题 | IDL TIFF file |
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宽度 | 6,376 px |
高度 | 8,821 px |
压缩方案 | LZW |
像素构成 | RGB |
方位 | 标准 |
像素数 | 3 |
水平分辨率 | 100 dpi |
垂直分辨率 | 100 dpi |
数据排列 | chunky format |
使用软件 | Adobe Photoshop CS3 Macintosh |
文件修改日期时间 | 2009年11月23日 (一) 17:30 |
色彩空间 | 无标定 |