Holocene Paleohydrology of the Subtropical Andes from Lake Records
Holocene Paleohydrology of the Subtropical Andes from Lake Records
批准号:
9613991
负责人:
Geoffrey Seltzer
金额:
$9.72万
依托单位:
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
1996
资助国家:
美国
项目状态:
已结题
起止时间:
1996-09-01 至 2000-08-31
中文摘要
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英文摘要
Abstract ATM-9613991 Seltzer, Geoffrey O. Syracuse University Title: Holocene Paleohydrology of the Subtropical Andes from Lake Records The primary objective of this project is to establish new multi- proxy Holocene paleoclimate records from the subtropical Andes. Previous work suggests a prolonged period of aridity during the mid-Holocene, however, more work to produce diatom and isotope records is necessary to confirm this hypothesis and determine the extent of this dry phase. Specifically, this award will support a study to define the timing of changes in the precipitation- evaporation balance of the Andean Altiplano on a decadal to century timescale for the Holocene. These records are needed to understand the long-term atmospheric dynamics of the subtropics and to assess the importance of decadal to millennial-scale shifts in the strength of summer convection. The Holocene climate history of the region will be reconstructed by analyzing the sediment, geochemical, magnetic, isotopic, and diatom content of lake cores dated at high-resolution by 210Pb and AMS 14C measurements. A transect of sites ranging from approximately 15o to 20oS in the eastern cordillera of Bolivia will be investigated. Such a record of changing effective moisture will provide insight into the long- term climate variability of subtropical South America. Changes in water resources may have also significantly impacted prehistoric people living on the Altiplano and may again be an important environmental factor for future populations in the region.
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Quaternary Paleoclimatic Record from Tropical South America: Drilling the Salar de Uyuni, Bolivia
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批准号:9820157
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项目类别:Continuing Grant
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资助金额:$14.94万
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财政年份:1999
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负责人:Geoffrey Seltzer
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依托单位:
Continuous Holocene Records of Paleo-El Nino Events from Laminated Lacustrine Sediment Cores from Southern Ecuador
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批准号:9813969
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项目类别:Standard Grant
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资助金额:$6.37万
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财政年份:1999
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负责人:Geoffrey Seltzer
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依托单位:
Quaternary Paleoclimate Record from Tropical South America: Lake Titicaca
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批准号:9708258
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项目类别:Continuing Grant
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资助金额:$17.63万
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财政年份:1997
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负责人:Geoffrey Seltzer
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依托单位:
Collaborative Proposal: Lake Titicaca: Toward a Detailed Record of Late Quaternary Climate in Subtropical South America
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批准号:9600051
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项目类别:Standard Grant
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资助金额:$4.71万
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财政年份:1996
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负责人:Geoffrey Seltzer
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依托单位:
(GRGC) Collaborative Research: High Resolution Glacial Geologic & Palynologic Records of the Last Deglaciation in the Tropical Andes
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批准号:9422424
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项目类别:Continuing Grant
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资助金额:$6.39万
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财政年份:1995
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负责人:Geoffrey Seltzer
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依托单位:
海外基金