Tapping outstanding new lake records of annual- to millennial-scale Holocene climate variability in the north Pacific region

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项目编号	1602106
	Tapping outstanding new lake records of annual- to millennial-scale Holocene climate variability in the north Pacific region
	Darrell Kaufman
主持机构	Northern Arizona University
项目开始年	2016
	2016-07-01
项目结束日期	2019-06-30
资助机构	US-NSF
项目类别	Continuing grant
项目经费	352041(USD)
国家	美国
语种	英语
英文摘要	Understanding climate variability over a wide range of timescales is a primary objective of climate science research because it is likely to improve our ability to foresee future climate. The investigators will document past (Holocene = 12,000 years) climate changes on time scales ranging from annual to millennial using evidence from sediments stored in lakes around Anchorage, Alaska, where climate closely tracks the broader North Pacific region. In addition, the sedimentary records contain information about: (1) ash-fall hazards from Cook Inlet volcanoes, (2) the magnitude and frequency of major earthquakes, (3) changes in glacier meltwater input to Eklutna Lake, a major source of electricity and freshwater for Anchorage, and (4) long-term environmental variability, which serves as a baseline reference for recent ecosystem changes. The project will support early-career scientists and will train graduate and undergraduate students. This study will take advantage of the best annually laminated (varved) sediment -- among the most valuable sources of proxy climate data -- ever recovered from Alaska. Fluctuations in varve thickness and grain size of sediments recovered from the glacier-fed study lakes reflect major hydroclimate changes. In addition, new sediment cores from non-glacial lakes will provide a multi-proxy approach to understanding how shifts in the mean state of climate during the Holocene were associated with changes in north Pacific climate variability.
来源学科分类	Geosciences - Earth Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/69787
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Darrell Kaufman.Tapping outstanding new lake records of annual- to millennial-scale Holocene climate variability in the north Pacific region.2016.