International Research Fellow Awards Program: Late Quaternary Changes of Vegetation and Climate in Northern Australia

国际研究员奖励计划：澳大利亚北部晚第四纪植被和气候变化

• 批准号: 9600284
• 负责人: Beverly Johnson
• 金额: $ 4.22万
• 依托单位: DC Fellowships
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9600284&HistoricalAwards=false
• 关键词: International; Research; Fellow; Awards; Program

9600284 Johnson The International Research Fellow Awards Program enables U.S. scientists and engineers to conduct three to twentyfour months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad. This award will support a fifteen-month postdoctoral research visit by Dr. Beverly J. Johnson, which will consist of a twelve-month research project working with Professor Allan R. Chivas at the University of Wollongong in Australia, and a three month re-entry award at the University of Colorado to work with Professor Gifford H. Miller. Vegetation in northern Australia is heavily influenced by the intensity of the monsoon and appears to have the potential to influence the intensity of the monsoon. An evaluation of the vegetation regimes responding to variations in the monsoon both prior to and after human arrival in conjunction with the fire-history of this area will allow for an evaluation of the role humans played on vegation and subsequent climate change in the continental interior. Dr. Johnson will analyze the stable isotope geochemistry of organic compounds extracted from core material in the Gulf of Carpentaria. The techniques proposed in this study provide some of the most powerful methods for tracking paleovegetation in marine vegetation currently known. If the predicted vegetation changes are measured, they will provide evidence linking the effects of human burning on vegetation and climate change in the Australian interior. Paleovegetation records reconstructed from the sediments in the Gulf will provide the ground truthing data necessary to verify the paleoclimate models. Upon her return to the United States, Dr. Johnson will complete any remaining analyses and write up the results of her research. She will receive additional support for her re-entry period through a grant from NSF's ATM program. ***

9600284约翰逊 国际研究员奖励计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。该计划的奖项提供了联合研究的机会，以及使用国外独特或互补的设施，专业知识和实验条件。 该奖项将支持贝弗利J.约翰逊博士为期15个月的博士后研究访问，其中包括与艾伦R.澳大利亚卧龙岗大学的芝华士，以及科罗拉多大学的三个月的再进入奖，与吉福德·H· 米勒。 澳大利亚北方的植被受季风强度的影响很大，似乎有可能影响季风的强度。 在季风变化之前和之后的人类到达与火灾历史的这一地区的植被制度的评价将允许的作用，人类在植被和随后的气候变化在大陆内部的评估。 约翰逊博士将分析从卡奔塔利亚湾岩心物质中提取的有机化合物的稳定同位素地球化学。 在这项研究中提出的技术提供了一些最强大的方法，用于跟踪目前已知的海洋植被中的古植被。 如果预测的植被变化得到测量，它们将提供证据，将人类燃烧对澳大利亚内陆植被和气候变化的影响联系起来。 从墨西哥湾沉积物中重建的古植被记录将为验证古气候模型提供必要的地面实况数据。 回到美国后，约翰逊博士将完成所有剩余的分析，并撰写研究结果。 她将通过NSF的ATM计划获得额外的支持。 ***