Quaternary Paleoclimatic Record From Tropical South America: Drilling the Salar de Uyuni, Bolivia
Quaternary Paleoclimatic Record From Tropical South America: Drilling the Salar de Uyuni, Bolivia
批准号:
9820156
负责人:
Tim Lowenstein
金额:
$15.77万
依托单位:
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1999
资助国家:
美国
项目状态:
已结题
起止时间:
1999-04-01 至 2003-03-31
中文摘要
题目:南美洲热带第四纪古气候记录:乌尤尼盐沼钻探项目:该项目旨在钻探乌尤尼盐沼,以恢复一个300米长的岩心,该岩心代表了大约0.5Myr的历史。将使用多代理方法对岩心进行分析,以重建高原的气候(有效湿度和温度)时间序列。采用14C法、Ar/Ar法和U/Th法测定年代。沉积学、流体包裹体岩石学、稳定同位素和元素地球化学以及古生物群(硅藻)的详细研究将构成气候重建的基础。本文将探讨以下主要问题:(1)南美洲热带地区晚更新世气候变率的性质是什么?(2)南美洲热带地区在冰期是湿的还是干的?(3)陆地热带气候变化是否与米兰科维奇强迫一致,是否与高纬度变化同步?哪些气候机制(例如大气水蒸气浓度的变化)导致了这些变化?(4)热带地区亚轨道尺度气候变化的主要频率是什么?这些变化是否与高纬度地区同步?哪些气候机制导致了这些古气候特征?
英文摘要
AbstractATM-9820156Lowenstein, Tim State University of New York at BinghamtonTitle: Quaternary Paleoclimatic Record from Tropical South America: Drilling the Salar de UyuniThis award supports a project to drill the Salar de Uyuni in order to recover a 300-meter long core, representing a history of about 0.5Myr. The core will be analyzed using a multi-proxy approach to reconstruct a climatological (effective moisture and temperature) time series of the Altiplano. Dating will be done by 14C, Ar/Ar, and U/Th methods. Detailed studies of the sedimentology, fluid inclusion petrography, stable isotopic and elemental geochemistry, and paleobiota (diatoms) will form the basis for the climatological reconstruction. The following majors questions will be addressed: (1) What was the nature of late Pleistocene climate variability in tropical South America ? (2) Was tropical South America wet or dry during glacial stages? (3) Are terrestrial tropical climate changes consistent with Milankovitch forcing and are they synchronous with high latitude changes? What climatic mechanisms (e.g. changes in the concentration of atmospheric water vapor) are responsible for these changes? (4) What are the dominant frequencies of suborbital-scale climatic changes in the tropics and are these variations in the terrestrial tropics synchronous with those at higher latitudes? What climatic mechanisms are responsible for these paleoclimatic characteristics?
期刊论文(0)
专著(0)
科研奖励(0)
会议论文
Collaborative Research: Regional hydrologic and vegetation changes over the last 150 kyr in the Searles and Death Valley basins
-
批准号:1903659
-
项目类别:Standard Grant
-
资助金额:$13.0万
-
财政年份:2019
-
负责人:Tim Lowenstein
-
依托单位:
Collaborative Research: Anatomy of a Greenhouse World: The Early Eocene of the Green River Basin, Wyoming
-
批准号:1812741
-
项目类别:Standard Grant
-
资助金额:$22.19万
-
财政年份:2018
-
负责人:Tim Lowenstein
-
依托单位:
Ancient Microorganism Communities in Fluid Inclusions in Halite and Gypsum
-
批准号:1024692
-
项目类别:Standard Grant
-
资助金额:$40.0万
-
财政年份:2010
-
负责人:Tim Lowenstein
-
依托单位:
Upgrading of Binghamton University Geoscience Microscopy/Fluid Inclusion Laboratory
-
批准号:0447165
-
项目类别:Standard Grant
-
资助金额:$9.72万
-
财政年份:2005
-
负责人:Tim Lowenstein
-
依托单位:
Collaborative Research: Preservation and Long-Term Bacterial Survival in Quaternary Age Salts from Death Valley, Chile, and Bolivia
-
批准号:0433802
-
项目类别:Standard Grant
-
资助金额:$30.8万
-
财政年份:2004
-
负责人:Tim Lowenstein
-
依托单位:
Collaborative Research: Antiquity of Life in Salt Deposits? A Rb-Sr Age-Dating Study
-
批准号:0418758
-
项目类别:Standard Grant
-
资助金额:$0.0万
-
财政年份:2004
-
负责人:Tim Lowenstein
-
依托单位:
Secular Variations in Seawater Chemistry Over the Past 600 MY: A Study of Fluid Inclusions in Marine Evaporites Using Three Analytical Techniques
-
批准号:9725740
-
项目类别:Continuing Grant
-
资助金额:$20.93万
-
财政年份:1998
-
负责人:Tim Lowenstein
-
依托单位:
Late Quaternary Paleoclimate History from Saline Lakes of the Arid Andes, 23-26 Degrees South-Paleohydrology and Geochemical Proxies
-
批准号:9709786
-
项目类别:Standard Grant
-
资助金额:$14.93万
-
财政年份:1997
-
负责人:Tim Lowenstein
-
依托单位:
Collaborative Research: Andean Climate History: Geochemical Proxies from a Holocene-Pleistocene Salt Core, Salar Del Hombre Muerto, Argentina
-
批准号:9632359
-
项目类别:Standard Grant
-
资助金额:$4.12万
-
财政年份:1996
-
负责人:Tim Lowenstein
-
依托单位:
Global Change: Quaternary Paleoclimate Record from Salt Cores (Death Valley, Saline Valley and Bristol Dry Lake, California)
-
批准号:9218717
-
项目类别:Continuing Grant
-
资助金额:$34.08万
-
财政年份:1993
-
负责人:Tim Lowenstein
-
依托单位:
Acquisition of Research-Grade Petrographic and Binocular Microscopes
-
批准号:9204788
-
项目类别:Standard Grant
-
资助金额:$3.06万
-
财政年份:1992
-
负责人:Tim Lowenstein
-
依托单位:
Modern Closed-Basin Potash Evaporites and Brine Evolution, Qaidam Basin, Qinghai Province, China
-
批准号:8816111
-
项目类别:Standard Grant
-
资助金额:$5.94万
-
财政年份:1989
-
负责人:Tim Lowenstein
-
依托单位:
海外基金