POWRE: High-Resolution Chronology of Millennial-Scale Lake-Level Fluctuations in the Dry Valleys (Antarctica) From Uranium-Thorium and Radiocarbon Dating

POWRE：根据铀-钍和放射性碳测年得出干燥山谷（南极洲）千禧年规模的湖泊水位波动的高分辨率年代学

• 批准号: 9805909
• 负责人: Brenda Hall
• 金额: $ 7.49万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9805909&HistoricalAwards=false
• 关键词: POWRE; Resolution; Chronology; Millennial; Scale

*** 9805909 The Professional Opportunities for Women in Research and Engineering (POWRE) program affords new research and educational enhancement opportunities for women scientists. This project, which addresses the fundamental problem of the cause of millennial-scale climate change, contains components specifically designed to increase the educational and research skills of the principal investigator. She will learn the following new information/skills: 1) thermal ionization mass spectrometry (TIMS) uranium/thorium (U/TH) dating with Dr. G. Henderson at Lamont-Doherty Earth Observatory (LDEO) and Oxford University, 2) millennial-scale climate change with Drs. W. Broecker and G. Bond, LDEO, and with Drs. D. Oppo and L. Keigwin, Woods Hole Oceanographic Institution, 3) Antarctic limnology with Dr. C. Hendy, University of Waikato, and 4) regional climate modeling with Dr. K. Maasch, University of Maine. She will then apply her new knowledge and skills to a study of millennial-scale fluctuations of lake levels in the Dry Valleys of Antarctica. The investigator will use TIMS, U/TH and accelerator mass spectrometric (AMS) radiocarbon dating of lacustrine carbonates to test the reservoir effect in order to ensure that the chronology of lake-level fluctuations in accurate. She will then use her knowledge of millennial-scale fluctuations to determine if the lake variations are similar to those seen elsewhere in the world. Knowledge of limnology will help not only to assess the lake reservoir effect, but also to begin to determine the cause of large-scale changes in lake level. Likewise, regional climate modeling will allow her to gain insight into the energy balance and wind patterns of the Dry Valleys region during the last glacial maximum. These new skills will benefit the P.I., not only in this particular project relating to Antarctic lakes, but also in her future Antarctic and Southern Hemisphere research in New Zealand and Patagonia. ***

* 9805909妇女在研究和工程专业机会（POWRE）计划为女科学家提供新的研究和教育提高机会。 该项目涉及千年尺度气候变化的根本原因问题，其中包括专门为提高主要调查员的教育和研究技能而设计的组成部分。 她将学习以下新的信息/技能：1）热电离质谱（TIMS）铀/钍（U/TH）与G。亨德森在拉蒙特-多尔蒂地球天文台和牛津大学，与W。Broecker和G.邦德，LDEO，和D博士。OPPO和L.凯格温，伍兹霍尔海洋研究所，南极湖沼学与C。怀卡托大学的亨迪，以及4）与K。马什，缅因州大学。 然后，她将运用她的新知识和技能，在南极洲干旱山谷湖泊水位的千年尺度波动的研究。 研究人员将使用TIMS、U/TH和加速器质谱（AMS）对湖相碳酸盐进行放射性碳测年，以测试储层效应，以确保湖平面波动年代学的准确性。 然后，她将利用她对千年尺度波动的了解来确定湖泊的变化是否与世界其他地方的变化相似。 湖沼学知识不仅有助于评估湖泊水库效应，而且有助于开始确定湖泊水位大规模变化的原因。 同样，区域气候建模将使她能够深入了解末次冰期最大期干谷地区的能量平衡和风模式。 这些新技能将有利于私家侦探，不仅在这个与南极湖泊有关的特别项目中，而且在她未来在新西兰和巴塔哥尼亚的南极和南半球研究中。 ***