Studies of the Concentration and Isotopic Composition of O2, N2 and Ar in Trapped Gases from the Vostok Ice Core

东方冰芯滞留气体中 O2、N2 和 Ar 的浓度和同位素组成研究

• 批准号: 8820807
• 负责人: Michael Bender
• 金额: $ 41.64万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-04-01 至 1993-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8820807&HistoricalAwards=false
• 关键词: Studies; Concentration; Isotopic; Composition; O2

Interactions between climate and the biosphere have a profound influence on the nature of our environment. The biosphere directly affects climate through regulating the concentration of CO2 and trace greenhouse gases, and by exerting a major influence on the hydrologic cycle. Climate has a great effect on the distribution of terrestrial ecosystems, and the related process of ocean circulation, is a major determinant of oceanic production and the characteristics of marine ecosystems. Describing the nature of climate-biosphere interactions is fundamental to understanding climatic evolution and its effects on the planetary ecosystem. The glacial-interglacial time scale is of special relevance to the interactions between climate and the biosphere here. Over this relatively short time interval (102 kyr), climate is not influenced by changing continental positions, long-term tectonic events such as mountain building, or the evolution of the fauna and flora. Rather, climate change is forced by variations in the distribution of solar insolation on the Earth's surface, variations in the atmospheric concentrations of the radiatively active gases, and perhaps by incompletely understood tectonic, stochastic climatological, and biotic processes as well. The detailed study of Pleistocene biogeochemistry and paleochemistry is an excellent way to learn about climate-biosphere interactions and is also crucial to the understanding of how Earth's climate will be influenced by man's alteration of the planetary environment. This research addresses a wide range of issues concerning interactions between the climate and the biosphere. The experimental work will determine the concentration and isotopic composition of O2, N2, and Ar in trapped air in the Vostok ice core, which preserves a record of the ambient environment back to 160 Kyr B.P.

气候和生物圈之间的相互作用 对我们环境的本质有着深远的影响。 的 生物圈直接影响气候通过调节 二氧化碳和微量温室气体的浓度， 对水文循环产生重大影响。 气候 对陆地生态系统的分布有很大影响， 海洋环流的相关过程是一个主要的决定因素 海洋生产和海洋生产的特点 生态系统 描述气候-生物圈的性质 相互作用是理解气候演变的基础 及其对地球生态系统的影响。 冰川-间冰期时间尺度具有特殊的相关性 气候和生物圈之间的相互作用。 超过 这段相对较短的时间间隔（102 kyr），气候不是 受大陆位置变化的影响， 例如造山运动或动物群的进化 和植物群。 相反，气候变化是由气候变化造成的。 太阳辐射在地球表面的分布 大气中的辐射浓度的变化 活跃的气体，也许是不完全了解的构造， 随机气候和生物过程。 的 更新世地球化学和古地球化学研究 是了解气候-生物圈相互作用的绝佳途径 也是理解 地球的气候将如何受到人类改变的影响 行星环境。这项研究涉及广泛的 关于气候与气候变化之间相互作用的一系列问题 生物圈 实验工作将决定 O2、N2和Ar的浓度和同位素组成 东方号冰芯中的空气， 将周围环境恢复到160 Kyr B. P.