File:Houston bmhd 2021038 lrg Feb 7 2021.jpg
![File:Houston bmhd 2021038 lrg Feb 7 2021.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/e/ef/Houston_bmhd_2021038_lrg_Feb_7_2021.jpg/731px-Houston_bmhd_2021038_lrg_Feb_7_2021.jpg?20210217190944)
原始文件 (4,381 × 3,593像素,文件大小:2.74 MB,MIME类型:image/jpeg)
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摘要
[编辑]描述Houston bmhd 2021038 lrg Feb 7 2021.jpg |
English: Houston Feb 7 2021.
A potent arctic weather system chilled much of the United States with frigid weather in mid-February 2021, shattering low-temperature records in the middle of the country. The extreme cold combined with several snow and ice storms to leave millions of people without power. Texas was hit particularly hard. According to news reports, natural gas shortages were already limiting power generation across Texas prior to the mid-February storm. Demand intensified after the polar air mass moved in on February 13, and controlled outages and downed power lines left parts of the state in the dark. The reported that 4 million customers across the state were without power on February 15, including 1.4 million in the Houston area. Many of those outages continued into the next day and are apparent in the images above depicting nighttime lights. Satellite data for the right image was acquired around 1 a.m. Central Standard Time on February 16; the left image was acquired around the same time on February 7, prior to the severe cold spell. Nighttime lights data have been overlaid on Landsat imagery so that city structure can still be distinguished. The nighttime lights data were acquired with the Visible Infrared Imaging Radiometer Suite (VIIRS) on the NOAA–NASA Suomi NPP satellite. VIIRS has a low-light sensor—the day/night band—that measures light emissions and reflections. Data are processed by a team of scientists from NASA’s Goddard Space Flight Center (GSFC) and Universities Space Research Association (USRA) to account for changes in the landscape (such as snow cover), the atmosphere, and Moon phase. |
日期 | |
来源 | https://earthobservatory.nasa.gov/images/147941/extreme-winter-weather-causes-us-blackouts |
作者 | NASA https://earthobservatory.nasa.gov/images/147941/extreme-winter-weather-causes-us-blackouts |
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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宽度 | 4,611 px |
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高度 | 3,593 px |
每色彩组分位数 |
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压缩方案 | 未压缩 |
像素构成 | RGB |
方向 | 正常 |
色彩组分数 | 3 |
水平分辨率 | 72 dpi |
垂直分辨率 | 72 dpi |
数据排布 | 大块格式 |
使用软件 | Adobe Photoshop 21.1 (Macintosh) |
文件修改日期时间 | 2021年2月16日 (二) 16:36 |
色彩空间 | sRGB |
数字化日期时间 | 2021年2月16日 (二) 11:03 |
元数据最后修改日期 | 2021年2月16日 (二) 11:36 |
原始文件唯一ID | xmp.did:9c414231-e530-407c-ae44-62db4cdae2ca |