期刊
QUATERNARY RESEARCH
卷 72, 期 2, 页码 301-308出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1016/j.yqres.2009.05.006
关键词
Radiocarbon dating; Carbon reservoir; Hardwater effect; Rice Lake, North Dakota; Cottonwood Lake, South Dakota; Devils Lake, Wisconsin; Chatsworth Bog, Illinois; Global Pollen Database; NEOTOMA database
资金
- National Science Foundation [BSR-8614916, EAR-0622289, EAR-9905327]
Although the carbon-reservoir problem with bulk-sediment radiocarbon dates from lakes has long been recognized, many synoptic studies continue to use chronologies derived from such dates. For four sites in central North America, we evaluate chronologies based on conventional radiocarbon dates from bulk sediment versus chronologies based on accelerator mass spectrometry (AMS) radiocarbon dates from terrestrial plant macrofossils. The carbon-reservoir error varies among sites and temporally at individual sites from 0 to 8000 yr. An error of 500-2000 yr is common. This error has important implications for the resolution of precise event chronologies. (C) 2009 University of Washington. Published by Elsevier Inc. All rights reserved.
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