Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL071307 |
Hemispheric sea ice distribution sets the glacial tempo | |
Lee, Jung-Eun1; Shen, Aaron2; Fox-Kemper, Baylor1; Ming, Yi3 | |
2017-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The proxy record of global temperature shows that the dominant periodicity of the glacial cycle shifts from 40kyr (obliquity) to 100kyr (eccentricity) about a million years ago. Using climate model simulations, here we show that the pace of the glacial cycle depends on the pattern of hemispheric sea ice growth. In a cold climate the sea ice grows asymmetrically between two hemispheres under changes to Earth's orbital precession, because sea ice growth potential outside of the Arctic Circle is limited. This difference in hemispheric sea ice growth leads to an asymmetry in absorbed solar energy for the two hemispheres, particularly when eccentricity is high, even if the annual average insolation is similar. In a warmer climate, the hemispheric asymmetry of the sea ice decreases as mean Arctic and Antarctic sea ice decreases, diminishing the precession and eccentricity signals and explaining the dominant obliquity signal (40kyr) before the mid-Pleistocene transition. |
英文关键词 | glacial cycle sea ice mid-Pleistocene transition |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395652600048 |
WOS关键词 | OCEAN CIRCULATION ; ANTARCTIC CLIMATE ; CYCLES ; TERMINATIONS ; ECCENTRICITY ; MILANKOVITCH ; TEMPERATURE ; LINKS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27428 |
专题 | 气候变化 |
作者单位 | 1.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA; 2.Brown Univ, Ctr Computat & Visualizat, Providence, RI 02912 USA; 3.Geophys Fluid Dynam Lab, Princeton, NJ USA |
推荐引用方式 GB/T 7714 | Lee, Jung-Eun,Shen, Aaron,Fox-Kemper, Baylor,et al. Hemispheric sea ice distribution sets the glacial tempo[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(2). |
APA | Lee, Jung-Eun,Shen, Aaron,Fox-Kemper, Baylor,&Ming, Yi.(2017).Hemispheric sea ice distribution sets the glacial tempo.GEOPHYSICAL RESEARCH LETTERS,44(2). |
MLA | Lee, Jung-Eun,et al."Hemispheric sea ice distribution sets the glacial tempo".GEOPHYSICAL RESEARCH LETTERS 44.2(2017). |
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