汪品先. 地质计时的天文“钟摆”[J]. 海洋地质与第四纪地质, 2006, 26(1): 1-7.
引用本文: 汪品先. 地质计时的天文“钟摆”[J]. 海洋地质与第四纪地质, 2006, 26(1): 1-7.
WANG Pin-xian. ASTRONOMICAL “PENDULUM” FOR GEOLOGICAL CLOCK[J]. Marine Geology & Quaternary Geology, 2006, 26(1): 1-7.
Citation: WANG Pin-xian. ASTRONOMICAL “PENDULUM” FOR GEOLOGICAL CLOCK[J]. Marine Geology & Quaternary Geology, 2006, 26(1): 1-7.

地质计时的天文“钟摆”

ASTRONOMICAL “PENDULUM” FOR GEOLOGICAL CLOCK

  • 摘要: 地球系统科学的发展,对于地质过程的时间度量提出了新要求。迄今为止,地球轨道参数的变化是地质尺度上惟一可以精确定量计算的周期现象,可以用作地质计时的标尺。40万年的偏心率长周期,是地质历史上最为稳定的轨道参数,至少在新生代以来通过低纬过程驱动着大洋碳储库的周期变化,是普遍出现而且容易辨认的轨道周期,可望作为地球历史的天文"钟摆"用于地质计时。

     

    Abstract: Development of Earth system science calls for new approaches to time measurement of geological processes. Up to now, the Earth's orbital parameters remain the only periodicities in geology subject to precise calculations and, therefore, may provide new scales for geochronology. The 400-ka long eccentricity is the most stable orbital parameter over the entire geological history and drives long-term periodical changes in the oceanic carbon reservoir through low-latitude processes, at least since the Cenozoic. Being extensively and easily recognizable in geological records, the 400-ka cycles are potentially the astronomical "pendulum" for the geological clock.

     

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