A Terrestrial Perspective of Last Millennium Hydroclimate Variability in the Central Tropical Pacific

GSTDTAP

项目编号	1602590
	A Terrestrial Perspective of Last Millennium Hydroclimate Variability in the Central Tropical Pacific
	Jessica Conroy
主持机构	University of Illinois at Urbana-Champaign
项目开始年	2016
	2016-05-01
项目结束日期	2019-04-30
资助机构	US-NSF
项目类别	Continuing grant
项目经费	270452(USD)
国家	美国
语种	英语
英文摘要	The tropical Pacific plays an enormous role in shaping global climate patterns, yet our understanding of how tropical Pacific climate has varied in the past remains uncertain due to sparse observations across this vast region. This research project will use lake sediments to reveal changes in precipitation and evaporation on the central tropical Pacific island of Kiritimati during the last 1000 years. The outcomes of this project will provide insight into the nature of multidecadal to centennial tropical Pacific climate variability, timescales critical in the context of future climate trends. The proposed research will produce new proxy records of central tropical Pacific climate. Time series of elemental abundance, biological indicators of lake water conductivity, and stable oxygen isotope ratios of ostracod calcium carbonate spanning the last millennium will provide a multi-proxy perspective on past lake water balance and atmospheric moisture balance. In addition, new weather, limnologic and stable oxygen isotope measurements of lake and groundwater will promote a more quantitative understanding of the climate controls on lake water balance within the framework of a proxy system model for lake water and ostracod oxygen isotope ratios. These newly developed records will permit hypothesis testing of whether meridional or zonal changes in atmospheric circulation played a more prominent role in controlling spatial patterns of tropical Pacific hydroclimate 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/69467
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Jessica Conroy.A Terrestrial Perspective of Last Millennium Hydroclimate Variability in the Central Tropical Pacific.2016.