Collaborative Research: Studies of Trapped Gases in Firn and Ice from Antarctic Deep Ice Cores

合作研究：南极深冰芯冰和冰中滞留气体的研究

• 批准号: 9714687
• 负责人: Edward Brook
• 金额: $ 24.19万
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-15 至 2002-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9714687&HistoricalAwards=false
• 关键词: Collaborative; Research; Studies; Trapped; Gases

This award is for support for a program to make high resolution studies of variations in the concentration of methane, the oxygenisotope composition of paleoatmospheric oxygen, and the total gas content of deep Antarctic ice cores. Studies of the concentration and isotopic composition of air in the firn of the Antarctic ice sheet will also be continued. One objective of this work is to use the methane concentration and oxygen-isotope composition of oxygen of air in ice as time-stratigraphic markers for the precise intercorrelation of Greenland and Antarctic ice cores as well as the correlation of ice cores to other climatic records. A second objective is to use variations in the concentration and interhemispheric gradient of methane measured in Greenland and Antarctic ice cores to deduce changes in continental climates and biogeochemistry on which the atmospheric methane distribution depends. A third objective is to use data on the variability of total gas content in the Siple Dome ice core to reconstruct aspects of the glacial history of West Antarctica during the last glacial maximum. The fourth objective is to participate in collaborative studies of firn air chemistry at Vostok, Siple Dome, and South Pole which will yield much new information about gas trapping in ice as well as the concentration history and isotopic composition of greenhouse gases, oxygen, trace biogenic gases and trace anthropogenic gases during the last 100 years.

该奖项是为了支持一项计划，以高分辨率研究甲烷浓度的变化，古大气氧的氧同位素组成，以及南极深层冰芯的总气体含量。 还将继续研究南极冰盖积雪中空气的浓度和同位素组成。 这项工作的目的之一是使用冰中空气中的甲烷浓度和氧同位素组成作为时间地层标志，用于格陵兰和南极冰芯的精确相互关联以及冰芯与其他气候记录的相关性。 第二个目标是利用在格陵兰和南极冰芯中测得的甲烷浓度和半球间梯度的变化来推断大气甲烷分布所依赖的大陆气候和地球化学的变化。 第三个目标是利用Siple Dome冰芯中气体总含量变化的数据，重建南极洲西部末次盛冰期的冰川历史。 第四个目标是参与在东方，Siple Dome和南极的积雪空气化学的合作研究，这将产生许多新的信息，气体捕获在冰以及浓度的历史和同位素组成的温室气体，氧气，微量生物源气体和微量人为气体在过去的100年。