timng of the last glacial maximum from observed sea level minima

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	timng of the last glacial maximum from observed sea level minima
	Yusuke Yokoyama ; Kurt Lambeck ; Patrick De Deckker ; Paul Johnston ; L.Keith Fifield
发表期刊	nature
	2000
卷号	406 页码:713-716
关键词	Glacial Periods Ice Ages Land Ice Time Measurement Geochronology Sea Level Radioactive Age Determination Gulfs Australia
英文摘要	During the Last Glacial Maximum, ice sheets covered large areas in northern latitudes, and global temperatures were significantly lower than today. But few direct estimates exist of the volume of the ice sheets, or the timing and rates of change during their advance and retreat. Here we analyze four distinct sediment facies in the shallow, tectonically stable Bonaparte Gulf, Australia - each of which is characteristic of a distinct range in sea level - to estimate the maximum volume of land-based ice during the last glaciation and the timing of the initial melting phase. We use faunal assemblages and preservation status of the sediments to distinguish open marine, shallow marine, marginal marine and brackish conditions, and estimate the timing and the mass of the ice sheets using radiocarbon dating and glacio-hydroisostatic modelling. Our results indicate that from at least 22,000 to 19,000 (calendar) years before present, land-based ice volume was at its maximum, exceeding today's grounded ice sheets by 52.5 x 10 exp 6 cu km. A rapid decrease in ice volume by about 10 percent within a few hundred years terminated the Last Glacial Maximum at 19,000 +/- 250 years.
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/3163
专题	科研共享资源
推荐引用方式 GB/T 7714	Yusuke Yokoyama,Kurt Lambeck,Patrick De Deckker,et al. timng of the last glacial maximum from observed sea level minima[J]. nature,2000,406:713-716.
APA	Yusuke Yokoyama,Kurt Lambeck,Patrick De Deckker,Paul Johnston,&L.Keith Fifield.(2000).timng of the last glacial maximum from observed sea level minima.nature,406,713-716.
MLA	Yusuke Yokoyama,et al."timng of the last glacial maximum from observed sea level minima".nature 406(2000):713-716.

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