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地球科学进展  1997, Vol. 12 Issue (5): 488-491    DOI: 10.11867/j.issn.1001-8166.1997.05.0488
学术动态     
天文古气候理论及其进展——从米兰柯维奇到贝尔杰
戴新刚,尚可政,丑纪范
兰州大学大气科学系 兰州 730000
ASTRONOMICAL THEORY OF PALEOCLIMATE AND ITS PROGRESS:FROM MILUTIN MILANKOVITCH TO ANDRE BERGER
DAI Xingang,SHANG Kezheng,CHOU Jifan
Department of Atmospheric Sciences,Lanzhou University,Lanzhou 730000
 全文: PDF(263 KB)  
摘要:

 扼要介绍了天文古气候学的创立和发展简史。太阳是地球大气运动的第一驱动力,地球气候的长期演变在很大程度上受到入射太阳辐射变化的影响。入射太阳辐射的变化主要和三个地球轨道参数有关,即地球绕太阳运行的椭圆轨道偏心率、地球自转轴倾角及岁差。太阳辐射的长期振荡主要集中在与这三个参数有关的频率上,这些频率通常被称为米兰柯维奇频率,数值模拟和地学记录都证实地质时间尺度的古气候的演化大多位于米兰柯维奇频率带上。这样,在一定程度上可以用太阳系天文轨道参数的变化来解释古气候演变。 

关键词: 天文古气候太阳辐射地学记录古气候数值模拟    
Abstract:

The astronomical theory of the paleoclimate serves for interpreting the paleoclimate flactuations and,especially,the Ice Age problem basing on the variations of astronomical orbital elements.It initiated in nineteenth century, but was formally astablished in 1941 when Milankovitch’s Kanon was published.Milankovitch emplasized the importance of caloric summer insolation on glaciation,i.e.,the cool and short summer is in favour of the development of glaciers.His computation comfirmed his idea.Unfortunately,his theory was argued for many years because of the insufficient geological records dated with poor accurant techniques.It was not until the implementation of CLIMAP(Climate Mapping Project) that found the paleoclimate oscillations really occurred in Milankovitch frequency belts.Meanwhile,A.Berger,a Belgian astr geoscientist,re calculated long term variation of the insolation with simpler method and more accuracy than ever before.The insolation he computed has even been dated up to past 10 000 000 years or more.His spectral analysis for the insolation clearly shows the 400 and 100 41 23 and 19 ka cycles corresponding to the astronomical elements of the eccentricity,obliquity and astronomical precession,respectively.In addition,his calculation scheme could be easily applied in numerical climate model as an orbital forcing which drives the general circulation of atmosphere. On the other hand,numerical simulation of paleoclimate is rapidly developing.A sectorially averaged two dimensional climate model like LLN 2D model consisting of coupled atmospheric,ocean and ice sheet models has been built,it can be run from remote geological past up to now,and some of which results may be compared directly with geological records or other proxy data,for instance,the δ 18 O,so as to re exame the Milankovitch’s theory as well as the impacts of other factors in paleoclimate.

Key words: Astr-paleoclimate    Insolation    Geo-records    Numerical simulation.
收稿日期: 1997-01-22 出版日期: 1997-10-01
:  P532  
通讯作者: 戴新刚,男,1958年10月出生,讲师,主要从事大气动力学和气候变化研究。   
作者简介: 戴新刚,男,1958年10月出生,讲师,主要从事大气动力学和气候变化研究。
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引用本文:

戴新刚,尚可政,丑纪范. 天文古气候理论及其进展——从米兰柯维奇到贝尔杰[J]. 地球科学进展, 1997, 12(5): 488-491.

DAI Xingang,SHANG Kezheng,CHOU Jifan. ASTRONOMICAL THEORY OF PALEOCLIMATE AND ITS PROGRESS:FROM MILUTIN MILANKOVITCH TO ANDRE BERGER. Advances in Earth Science, 1997, 12(5): 488-491.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.1997.05.0488        http://www.adearth.ac.cn/CN/Y1997/V12/I5/488

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