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Back国际计量大会决定取消闰秒
国际计量大会决定取消闰秒
Science
中国新闻网3 hours agoScience1 min readChinaView translation

国际计量大会决定取消闰秒

闰秒国际计量大会协调世界时

Quick Look

第28届国际计量大会决定，自2027年5月20日起全球范围内停止插入闰秒，将UTC与UT1的最大允许偏差放宽至3600秒，以避免闰秒机制对经济社会运行造成的现实风险与系统故障。

AI-generated summary

Why It Matters

1972年起全球以UTC为民用标准时间基础并靠不定期插入闰秒使其与UT1时差控制在0.9秒内，至今已插入27次正闰秒。

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中新社北京10月19日电 (记者 刘亮)中国国家市场监管总局19日公布，近日在法国凡尔赛召开的第28届国际计量大会(CGPM)决定，自2027年5月20日起全球范围内停止插入闰秒，将基于原子钟的协调世界时(UTC)与基于地球自转的世界时(UT1)的最大允许偏差放宽至3600秒(1小时)。

1972年起，全球以UTC为民用标准时间基础，靠不定期插入闰秒使其与UT1时差控制在0.9秒内。由于地球自转时间难以精准预判，插入闰秒无固定周期，正闰秒时1分钟为61秒，负闰秒则为59秒，造成时间不连续，至今已插入27次正闰秒，尚未插入负闰秒。

据悉，闰秒机制对经济社会运行造成了现实的风险，插入正闰秒会出现“23:59:60”特殊时刻，不少系统适配不足，易引发故障。2025年，国际时间频率咨询委员会(CCTF)指出，鉴于地球自转正在加快，未来几年首次插入负闰秒的概率很高，而全球系统普遍未测试适配，插入负闰秒可能对经济社会造成更大冲击。

国家市场监管总局称s，将会同有关部门加强形势研判分析，确保中国标准时间独立自主、安全可控、平稳运行，推动全球标准时间的协调一致。(完)

What to Watch

AI outlook — possibilities, not facts

  • 自2027年5月20日起全球范围内停止插入闰秒

    Very likely · Within months

Open Questions

  • 中国将采取哪些具体措施确保标准时间平稳运行？

Related Topics

闰秒
People刘亮
Organizations中国国家市场监管总局国际计量大会国际时间频率咨询委员会
Places北京法国凡尔赛中国
Topics国际计量大会协调世界时国家市场监管总局原子钟
This article was originally published by 中国新闻网.

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