Investigations of Fundamental Processes Affecting Hydrogen and Oxygen Isotope Ratios of Tree Ring Wood Cellulose
影响树轮木质纤维素氢氧同位素比值的基本过程研究
基本信息
- 批准号:9121289
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing grant
- 财政年份:1992
- 资助国家:美国
- 起止时间:1992-06-01 至 1998-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This award supports a fundamental set of experiments in paleoclimatic research. Isotopic paleodendroclimatology is founded on the assumption that wood cellulose hydrogen and oxygen isotope ratios co-vary in a one-to-one fashion with those of the water available to a tree. Qualitative and quantitative interpretations of wood cellulose isotope ratios involve the further assumption that post-photosynthetic processes do not affect cellulose isotopic compositions, and predict that humidity will influence wood cellulose D/H and 180/160 ratios. Neither of the assumptions may be valid, and the prediction of a humidity effect may be incorrect. Experiments that will resolve these fundamental uncertainties are to be performed with potatoes, avocados, the aquatic plant Lemna gibba, and protoplasts cultured from a variety of tree species of interest to isotope paleodendroclimatologists.
该奖项支持古气候研究中的一系列基本实验。同位素古树木气候学建立在木材、纤维素、氢和氧的同位素比率与树木可利用的水的比率以一对一的方式共同变化的假设之上。木材纤维素同位素比值的定性和定量解释涉及进一步的假设,即光合作用后过程不影响纤维素同位素组成,并预测湿度将影响木材纤维素D/H和180/160比值。这两个假设可能都不成立,湿度效应的预测也可能是不正确的。解决这些根本不确定性的实验将用土豆、鳄梨、水生植物浮萍,以及同位素古树木气候学家感兴趣的各种树种的原生质体进行。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Michael DeNiro其他文献
Natural Abundance <sup>2</sup>H/<sup>1</sup>H Ratios of Water Storage in Leaves of Peperomia Congesta HBK during Water Stress
- DOI:
10.1016/s0176-1617(11)82144-9 - 发表时间:
1994-10-01 - 期刊:
- 影响因子:
- 作者:
Dan Yakir;Irwin Ting;Michael DeNiro - 通讯作者:
Michael DeNiro
Michael DeNiro的其他文献
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{{ truncateString('Michael DeNiro', 18)}}的其他基金
Use of Natural Variations in Silicon Isotopes to Study the Cycling of Biogenic Silica
利用硅同位素的自然变化研究生物二氧化硅的循环
- 批准号:
9216295 - 财政年份:1993
- 资助金额:
-- - 项目类别:
Continuing Grant
Reconstruction of Prehistoric Diet Based on Stable Isotope Ratios of Bone and Organic Residues from Pot Sherds
基于骨头稳定同位素比和锅碎片有机残留物重建史前饮食
- 批准号:
8916273 - 财政年份:1989
- 资助金额:
-- - 项目类别:
Continuing grant
Hydrogen and Oxygen Isotope Ratios in Plant Cellulose
植物纤维素中的氢和氧同位素比率
- 批准号:
8896201 - 财政年份:1988
- 资助金额:
-- - 项目类别:
Continuing grant
Reconstruction of Prehistoric Diet Based on Stable Isotope Ratios of Bone and Organic Residues from Pot Sherds
基于骨头稳定同位素比和锅碎片有机残留物重建史前饮食
- 批准号:
8418280 - 财政年份:1985
- 资助金额:
-- - 项目类别:
Standard Grant
Hydrogen and Oxygen Isotope Ratios in Plant Cellulose
植物纤维素中的氢和氧同位素比率
- 批准号:
8405003 - 财政年份:1984
- 资助金额:
-- - 项目类别:
Continuing Grant
Stable Isotopic Investigations of Early Development in Extant and Fossil Chambered Cephalopods
现存和化石室状头足类动物早期发育的稳定同位素研究
- 批准号:
8212165 - 财政年份:1983
- 资助金额:
-- - 项目类别:
Continuing Grant
Conference on Diet and Human Evolution, to Be Held in Ventura, California, January 30 to February 3, 1984
饮食与人类进化会议,将于1984年1月30日至2月3日在加利福尼亚州文图拉举行
- 批准号:
8310808 - 财政年份:1983
- 资助金额:
-- - 项目类别:
Standard Grant
Diet and Stable Isotope Analysis of Bone
饮食和骨稳定同位素分析
- 批准号:
7924756 - 财政年份:1980
- 资助金额:
-- - 项目类别:
Continuing Grant
Stable Isotope Biogeochemistry of the Methane-Generating Bacteria
产甲烷细菌的稳定同位素生物地球化学
- 批准号:
7926239 - 财政年份:1980
- 资助金额:
-- - 项目类别:
Standard Grant
Analysis of Biological Processes Which Affect Climatic Reconstruction Based on Stable Isotope Ratios of Tree Rings
基于树木年轮稳定同位素比分析影响气候重建的生物过程
- 批准号:
7924591 - 财政年份:1980
- 资助金额:
-- - 项目类别:
Continuing Grant
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