Global climate evolution during the last deglaciation
Global climate evolution during the last deglaciation
复制标题
DOI：
10.1073/pnas.1116619109
复制
发表时间：
2012-05-08
影响因子：
11.1
通讯作者：
Williams, John W.
中科院分区：
文献类型：
--
作者：
Clark, Peter U.;Shakun, Jeremy D.;Williams, John W.
破译从末次盛冰期末期到全新世早期11 ka的全球气候演变，为理解地球气候系统对外部和内部强迫的瞬态响应提供了一个绝佳的机会。在这段全球变暖期间，冰盖的消融导致全球平均海平面上升了大约80米；陆地和海洋生态系统经历了大的扰动和范围转移；碳循环的扰动导致温室气体CO2和CH4向大气的净释放；大气和海洋环流的变化影响了全球水和热的分布和通量。在这里，我们总结了古气候研究界的一项主要努力，即通过对深海和中层海洋以及表层气候的精确、高分辨率记录的发展来表征这些变化。我们的综合表明，两种模态的叠加解释了末次冰期区域和全球气候的大部分变化，其中第一模态与温室气体的变化之间有很强的联系，第二模态与大西洋经向翻转环流的变化之间有很强的联系。
Deciphering the evolution of global climate from the end of the Last Glacial Maximum approximately 19 ka to the early Holocene 11 ka presents an outstanding opportunity for understanding the transient response of Earth's climate system to external and internal forcings. During this interval of global warming, the decay of ice sheets caused global mean sea level to rise by approximately 80 m; terrestrial and marine ecosystems experienced large disturbances and range shifts; perturbations to the carbon cycle resulted in a net release of the greenhouse gases CO2 and CH4 to the atmosphere; and changes in atmosphere and ocean circulation affected the global distribution and fluxes of water and heat. Here we summarize a major effort by the paleoclimate research community to characterize these changes through the development of well-dated, high-resolution records of the deep and intermediate ocean as well as surface climate. Our synthesis indicates that the super-position of two modes explains much of the variability in regional and global climate during the last deglaciation, with a strong association between the first mode and variations in greenhouse gases, and between the second mode and variations in the Atlantic meridional overturning circulation.