File:Shrinking Lake Ebinur 2013 (cropped).jpg
原始文件 (3,785 × 2,973像素,文件大小:4.27 MB,MIME类型:image/jpeg)
摘要
描述Shrinking Lake Ebinur 2013 (cropped).jpg |
English: In 2014, the eastern lobe of the Aral Sea dried up, bringing attention to the human impact on the Central Asian landscape. But the Aral Sea isn’t the only lake in the region that is losing water. In northwestern China, near the border of Kazakhstan, Lake Ebinur has shrunk by 50 percent since 1955.
The Operational Land Imager (OLI) on Landsat 8 captured this image of Lake Ebinur (also called Aibi or Ebi lake) on October 20, 2013. The lake’s saline water appears light blue, while the dried lake bed, or playa, is white. Largely surrounded by mountains, Ebinur Lake sits at the bottom of a drainage basin with no outlet. The Borohoro Mountains lie to the south and the Dzungarain Alatau mountains lie to the north. Farms and settlements in the Boertala Valley are visible west of the lake. Lake Ebinur’s size fluctuates from year to year due natural variations in snowmelt and rainfall. But human activity has played a key role in drawing down the lake over the past five decades, according to research published by scientists from the Chinese Academy of Sciences. The middle inset shows Bole, a bustling city of 425,000 people in the Boertala Valley that consumes significant amounts of water. Farmers in the valley (especially cotton farmers) also irrigate their crops with water that would otherwise go into the lake. The drawdown of Lake Ebinur has exposed broad playas that are rich with salt and other minerals left behind when pools of water evaporate. Winds rush through a gap in the mountains to the north—the Dzungarian Gate—and regularly kick up saline dust storms on the playa. That salty dust is often carried east into the Junggar Basin. In the bottom inset, note the sand dunes and the role that wind has played in sculpting the playa. Frequent dust storms have a range of undesirable effects downwind. For instance, saline dust contributes to desertification, damages soils, harms wetlands, and may be hastening the melting of snow and glaciers downwind. |
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来源 | https://earthobservatory.nasa.gov/images/84785/shrinking-lake-ebinur | |||
作者 | NASA Earth Observatory image by Robert Simmon and Adam Voiland, using Landsat data from the U.S. Geological Survey. Caption by Adam Voiland. | |||
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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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Public domainPublic domainfalsefalse |
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描繪內容
20 10 2013
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当前 | 2022年2月12日 (六) 08:35 | 3,785 × 2,973(4.27 MB) | Hubert Kororo | File:Shrinking Lake Ebinur 2013.jpg cropped 32 % horizontally, 20 % vertically using CropTool with lossless mode. |
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宽度 | 7,711 px |
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高度 | 7,841 px |
每部件位数 |
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压缩方案 | Deflate (Adobe) |
像素构成 | RGB |
方位 | 标准 |
像素数 | 3 |
水平分辨率 | 72 dpi |
垂直分辨率 | 72 dpi |
数据排列 | chunky format |
使用软件 | Adobe Photoshop CS6 (Macintosh) |
文件修改日期时间 | 2014年11月24日 (一) 15:06 |
色彩空间 | 无标定 |
数字化日期时间 | 2014年1月3日 (五) 12:02 |
原始数据最后修改日期 | 2014年11月24日 (一) 10:06 |
原始文件唯一ID | xmp.did:21BD880A142068118C14A48DB19D012C |