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Rhythms and Rhythmic Structures of the Earth

地球的节律和节律结构

基本信息

批准号：
02302031
负责人：
ITO Keisuke
金额：
$ 2.82万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02302031/
关键词：
Rhythm Banded Structure Climate change Geomagnetism Evolution of life Nonlinear phenomena Earth's rotation Sedimentary cycles ミランコビッチサイクル

项目摘要

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.

目前的合作研究由以下四个工作组进行：（1）沉积旋回研究组，（2）古韵律化石记录研究组，（3）古地磁韵律研究组，（4）包括气候变化和地球自转在内的地质韵律数学模型研究组。举办了两次关于地质韵律和韵律结构的专题讨论会和一次讲习班，并进行了两次实地考察，研究沉积物的韵律层理。第一组研究了各种类型的韵律层理，并提出了它们的成因。第二组利用石化木年轮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。第四个小组发现，太阳和地球活动都存在明显的倍周期结构，表明地球活动受到太阳的影响。这些成果是对正在进行的“地球多圈相互作用、演化和节律”国家研究项目的新的重要贡献。研究结果以两份专题讨论会论文集的形式发表，即“节奏和节奏结构（I）和（II）"，可通过首席研究员获得。