干旱区生态环境知识资源中心(Arid): Precipitation and lake-level changes in the West and Midwest over the past 10,000 to 24,000 years. Final report

Arid

DOI	10.2172/60231
报告编号	UCRL--15173
来源ID	OSTI_ID: 60231
	Precipitation and lake-level changes in the West and Midwest over the past 10,000 to 24,000 years. Final report
	Webb, T. III; Street, F.A.; Howe, S.
英文摘要	The goal of the research described in this report is to document the climatic variability over the past 10,000 to 20,000 years in areas in which sites may be designated for the burial of nuclear wastes. Three separate data sets were studied, and the results are presented in three chapters. The first data set consisted of radiocarbon dates documenting past changes in lake levels in lakes and playas in the western United States. The sites were mapped where water levels were higher than the levels today and were presented in a table telling what evidence is available at each site. The lake-level fluctuations for the past 24,000 years at sites in the West were also mapped and time series for these fluctuations at four sites were presented. The second data set was a selection of the published radiocarbon-dated pollen diagrams from the western United States. These data are a valuable source of climatic information and complement the geological evidence of lake-level fluctuations in the West. A table is presented that gives the location, elevation, and number of radiocarbon dates for each site. The third data set was a set of fossil pollen data from 20 sites in the upper Midwest. These data were calibrated in terms of precipitation changes over the past 10,000 years, and maps are presented of the estimated precipitation changes between 10,000 and 7000 years ago and between 7000 years ago and today.
出版年	1980
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	05 NUCLEAR FUELS ; 58 GEOSCIENCES ; CLIMATES ; GEOLOGIC HISTORY ; VARIATIONS ; USA ; GEOLOGIC SURVEYS ; UTAH ; ARIZONA ; NEW MEXICO ; TEXAS ; SOUTH DAKOTA ; MINNESOTA ; NEVADA ; GROUND WATER ; PRECIPITATION ; GREAT SALT LAKE ; LAKES ; POLLEN ; MATHEMATICAL MODELS ; SITE SELECTION ; RADIOACTIVE WASTE DISPOSAL ; UNDERGROUND DISPOSAL ; ISOTOPE DATING ; CARBON 14 ; MAPS ; METEOROLOGY ; TABLES ; GRAPHS ; EXPERIMENTAL DATA ; Yucca Mountain Project
URL	http://www.osti.gov/scitech/servlets/purl/60231
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/262602
推荐引用方式 GB/T 7714	Webb, T. III,Street, F.A.,Howe, S.. Precipitation and lake-level changes in the West and Midwest over the past 10,000 to 24,000 years. Final report,1980.