Rhythms and Rhythmic Structures of the Earth

目前的合作研究由以下四个工作组进行：(1)沉积旋回研究工作组，(2)古节律化石记录研究工作组，(3)古地磁节律研究工作组，(4)气候变化和地球自转等地质节律数学模型研究工作组。举办了2次地质节律与韵律构造专题讨论会和1次研讨会，进行了2次沉积物韵律层理的实地考察。第一组研究了不同类型的韵律层理，并提出了它们的起源。第二组使用石化木材的年轮来估计古气候的年变化。第三组在古地磁记录的变化中发现了大气-海洋-地幔-地核系统动力学之间的相关性。第四组发现太阳和地球活动都有明显的周期加倍结构，表明地球活动受到太阳的夹带。这些结果是对正在进行的“地球多球相互作用、演化和节奏”国家研究项目的新的重要贡献。研究结果以研讨会的两篇论文集的形式发表，“节奏和节奏结构(I)和（II）”，可通过首席研究员获得。

The present cooperative research has been performed by the following four working groups : (1) the group to study sedimentary cycles, (2) the group to study fossil records of paleo-rhythms, (3) the group to study paleomagnetic rhythms, and (4) the group to study mathematical models of geological rhythms including the changes of climate and the earth's rotation. Two symposia and one workshop on the geological rhythms and the rhythmic structure were held and two field trips to study rhythmic bedding of sediments were conducted. The first group studied various types of rhythmic bedding and proposed their origin. The second group used the tree rings of petrified wood to estimate the annual changes of paleoclimate. The third group found in the change of paleomagnetic records the correlation among dynamics of the atmosphere-ocean-mantle-core systems. The fourth group found a clear period-doubling structure of periodicity in both solar and terrestrial activities, suggesting the entrainment of terrestrial activity by the sun. These results are new and important contributions to the undergoing national research project on the "Earth's Multisphere Interaction, Evolution and Rhythms". Results have been published in the form of two proceedings of the symposia, "Rhythms and Rhythmic Structure (I) and (II)", which are available through the head investigator.