标签: 南极

南极的月食

2022年11月5日 Lunar Eclipse at the South Pole Image Credit & Copyright: Aman Chokshi Explanation: Last May 16 the Moon slid through Earth’s shadow, completely immersed in the planet’s dark umbra for about 1 hour and 25 minutes during a total lunar eclipse. In this composited timelapse view, the partial and total phases of the eclipse were captu...

月球南极的阴影图

2022年4月10日 Shadows at the Moon’s South Pole Image Credit: NASA, Arizona State U., Lunar Reconnaissance Orbiter Explanation: Was this image of the Moon’s surface taken with a microscope? No — it’s a multi-temporal illumination map made with a wide-angle camera. To create it, the Lunar Reconnaissance Orbiter spacecraft collected 1,700 i...

南极风景画

2021年12月11日 Postcard from the South Pole Image Credit & Copyright: Aman Chokshi Explanation: From this vantage point about three quarters of a mile from planet Earth’s geographic South Pole, the December 4 eclipse of the Sun was seen as a partial eclipse. At maximum eclipse the New Moon blocked 90 percent of the solar disk. Of course, crews at the...

南极的日出

2021年10月5日 Sunrise at the South Pole Image Credit & Copyright: Martin Wolf (U. Wisconsin), IceCube Neutrino Obs., NSF; ht: Alice Allen Explanation: Sunrise at the South Pole is different. Usually a welcome sight, it follows months of darkness — and begins months of sunshine. At Earth’s poles, it can take weeks for the Sun to rise, in contras...

自发现以来,臭氧空洞在今年达到最小值

今年,南极上空的臭氧空洞在9月8日达到了峰值,面积为630万平方英里(约合1640万平方公里),在此之后呈现下降趋势。2019年南极上层大气的异常天气模式极大地限制了臭氧的消耗。 图片来源:NASA 10月21日,美国航空航天局(NASA)和美国国家海洋和大气管理局(NOAA)的科学家发布报告称,在9月和10月,南极上层大气异常的气候模式极大地限制了臭氧的消耗,这让观测到的臭氧空洞面积自1982年以来达到了最小值。 依据NASA和NOAA的卫星测量结果,2019年臭氧空洞在9月8日达到了630万平方英里(约合1640万平方公里)的峰值,然后在9月和10月的剩余时间内,这一面积缩小到了不足390万平方英里(约合1000万平方公里)。在天气状况正常的年份中,在9月下旬或10月初,臭氧空洞的最大面积通常会增长到大约8...