气候变化领域集成服务门户(CCPortal): Stability of the astronomical frequencies over the earth's history for paleoclimate studies

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DOI	10.1126/science.255.5044.560
	Stability of the astronomical frequencies over the earth's history for paleoclimate studies
	Berger A.; Loutre M.F.; Laskar J.
发表日期	1992
ISSN	0036-8075
起始页码	560
结束页码	566
卷号	255 期号:5044
英文摘要	The expected changes over the past 500 million years in the principal astronomical frequencies influencing the Earth's climate may be strong enough to be detectable in the geological records, and such effects have been inferred in several cases. Calculations suggest that the shortening of the Earth-moon distance and of the length of the day back in time induced a shortening of the fundamental periods for the obliquity and climatic precession, from 54 to 35, 41 to 29, 23 to 19, and 19 to 16 thousand years over the last half-billion years. At the same time, the precessional constant increased from 50 to 61 arc seconds per year. The changes in the frequencies of the planetary system due to its chaotic motion are much smaller; their influence on the changes of the periods of climatic precession, obliquity, and eccentricity of the Earth's orbit around the sun can be neglected. Eccentricity periods used for Quaternary climate studies may therefore be considered to have been more or less constant for pre-Quaternary times.
英文关键词	astronomical frequency; climatic precession; day length; Earth/Moon distance; eccentricity; obliquity; palaeoclimate
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243029
作者单位	Institut d'Astronomie et de Géophysique Georges Lemaître, Université Catholique de Louvain, 2 Chemin du Cyclotron, 1348 Louvain-la-Neuve, Belgium; Bureau des Longitudes, UA 707 du CNRS, 77 Avenue Denfert-Rochereau, Paris, 75014, France
推荐引用方式 GB/T 7714	Berger A.,Loutre M.F.,Laskar J.. Stability of the astronomical frequencies over the earth's history for paleoclimate studies[J],1992,255(5044).
APA	Berger A.,Loutre M.F.,&Laskar J..(1992).Stability of the astronomical frequencies over the earth's history for paleoclimate studies.Science,255(5044).
MLA	Berger A.,et al."Stability of the astronomical frequencies over the earth's history for paleoclimate studies".Science 255.5044(1992).