CRUI: Historic Patterns of Fog Utilization and Climate Variability Using Stable Isotope Ratio Analysis of Redwood Tree Ring Cellulose.

CRUI：利用红杉树年轮纤维素稳定同位素比分析的雾利用和气候变化的历史模式。

• 批准号: 0330806
• 负责人: John Roden
• 金额: $ 45.78万
• 依托单位: Southern Oregon University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-12-01 至 2007-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0330806&HistoricalAwards=false
• 关键词: CRUI; Historic; Patterns; Fog; Utilization

Fog represents a significant water resource for redwood (Sequoia sempervirens) forests. The availability of fog for plants may depend on a number of climatic factors, such as sea surface temperatures (El Nino events) and drought. The objective of this study is to quantify historic fog utilization patterns by redwood trees using stable isotope analysis of water sources and tree-ring cellulose. This is an interdisciplinary project that links diverse fields of study such as biology, biogeochemistry, paleoclimatology, ecosystem hydrology, oceanography and meteorology. This study will lay the foundation for understanding how the climatic signals associated with fog water utilization are recorded in tree-rings. Slabs of already harvested ancient Redwood trees could provide 1000+ year reconstructions of the periodicity and strength of important climatic cycles. A historic record of hydrologic inputs for these trees is critical for understanding how climatic change, climatic variation as well as forest management practices influence the vigor of this endangered ecosystem. The proposed research will primarily use stable isotope analysis of water sources and tree-ring cellulose to determine current and past fog water utilization by Redwood trees. Isotopes are passive tracers of transformations within organisms and the biosphere. Weather records from nearby stations will be used to calibrate recent tree ring signals with recent climatic events. Current environmental conditions and water sources will also be quantified to enhance modeling efforts to link cellulose isotopic composition and climate.

雾是红杉（Sequoia sempervirens）森林的重要水资源。植物能否获得雾可能取决于许多气候因素，例如海面温度（厄尔尼诺事件）和干旱。本研究的目的是利用水源和树轮纤维素的稳定同位素分析来量化红杉树历史上的雾利用模式。这是一个跨学科项目，连接生物学、生物地球化学、古气候学、生态系统水文学、海洋学和气象学等不同研究领域。这项研究将为了解如何在树木年轮中记录与雾水利用相关的气候信号奠定基础。已经采伐的古老红杉树板可以重建 1000 多年的重要气候周期的周期性和强度。这些树木的水文输入的历史记录对于了解气候变化、气候变化以及森林管理实践如何影响这一濒危生态系统的活力至关重要。拟议的研究将主要利用水源和树轮纤维素的稳定同位素分析来确定红杉树当前和过去的雾水利用情况。同位素是生物体和生物圈内转变的被动示踪剂。附近气象站的天气记录将用于根据最近的气候事件校准最近的树木年轮信号。当前的环境条件和水源也将被量化，以加强将纤维素同位素组成和气候联系起来的建模工作。