File:Guam ali 2011364 lrg.jpg
![File:Guam ali 2011364 lrg.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Guam_ali_2011364_lrg.jpg/465px-Guam_ali_2011364_lrg.jpg?20200524081603)
原始文件 (3,994 × 5,148像素,文件大小:4.36 MB,MIME类型:image/jpeg)
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摘要
[编辑]描述Guam ali 2011364 lrg.jpg |
English: On December 30, 2011, cloud-free skies presented NASA’s Earth Observing-1 (EO-1) satellite with this unobstructed view of the island of Guam. Note that this image, taken by the satellite’s Advanced Land Imager (ALI), has been rotated and north is at right.
Located in the tropical Pacific Ocean, the U.S. territory of Guam lies at the southern end of the Mariana Island Chain. As the largest island in that archipelago, Guam stretches roughly 30 miles (50 kilometers) from northeast to southwest. Fields, forests, military bases, and settlements all mix on the landscape. Two prominent airstrips run northeast-southwest, one at the northeastern tip of the island, and the other in central Guam. Guam has two seasons: wet (June to December) and dry (January to June), and ALI acquired this image during the transition from wet to dry. The fate of that rainwater has a lot to do with whether it lands in the northern or southern part of the island. In southern Guam, volcanic rock predominates, but in northern Guam, limestone overlies volcanic rock. Limestone is porous—so porous, in fact, that practically all the water in northern Guam infiltrates the rock. After percolating through the limestone, water in northern Guam becomes part of the groundwater system. Guam’s rivers are confined to the southern part of the island, where less porous volcanic rock enables water to collect on the surface. Coral reefs fringe the island, and they are especially visible around Apra Harbor and Cocos Lagoon. Shallow water along these reefs glows peacock blue. Not far from Guam, the ocean is anything but shallow. Just east of the Mariana Islands lies the Mariana Trench. Located at the boundary between tectonic plates, it is the deepest point in the Earth’s ocean. References
NASA Earth Observatory image created by Jesse Allen and Robert Simmon, using EO-1 ALI data provided courtesy of the NASA EO-1 team and the United States Geological Survey. Caption by Michon Scott. Instrument: EO-1 - ALI |
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来源 | http://earthobservatory.nasa.gov/IOTD/view.php?id=77189 | |||
作者 | NASA | |||
其他版本 |
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许可协议
[编辑]Public domainPublic domainfalsefalse |
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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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图像标题 |
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宽度 | 5,491 px |
高度 | 11,161 px |
每色彩组分位数 |
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压缩方案 | LZW |
像素构成 | RGB |
方向 | 正常 |
色彩组分数 | 3 |
水平分辨率 | 100 dpi |
垂直分辨率 | 100 dpi |
数据排布 | 大块格式 |
使用软件 | Windows Photo Editor 10.0.10011.16384 |
文件修改日期时间 | 2020年5月24日 (日) 04:15 |
色彩空间 | sRGB |
数字化日期时间 | 2012年2月1日 (三) 07:48 |
元数据最后修改日期 | 2012年2月16日 (四) 06:30 |
原始文件唯一ID | xmp.did:FB7F117407206811AA97CCED880B21C1 |