P2C2: Synoptic Dendroclimatology--Using Tree Rings to Reconstruct the Driving Forces of Hydroclimatic Variability in the Western United States

P2C2：天气树气候学——利用树木年轮重建美国西部水文气候变化的驱动力

基本信息

批准号：
1102757
负责人：
Erika Wise
金额：
$ 25.13万
依托单位：
University of North Carolina at Chapel Hill
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-07-01 至 2015-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1102757&HistoricalAwards=false
关键词：
P2C2 Synoptic Dendroclimatology Using Tree

项目摘要

The researcher will examine western U.S. hydroclimatic variability and its relationship to El Nino/Southern Oscillation (ENSO) using synoptic dendroclimatology. Synoptic dendroclimatology integrates synoptic climatology and dendrochronology in a process-based approach linking large-scale circulation patterns to local tree-growth anomalies. The researcher contends that it has been difficult to apply existing ENSO reconstructions to assess ENSO impacts in extratropical regions due to the instability of the impact pattern and the influence of other atmospheric controls on climate patterns in the U.S. west.There are three main objectives of the research: 1) develop a long-term record of atmospheric pressure patterns using existing tree-ring chronologies and gridded reanalysis data; 2) determine controls on persistent meridional and zonal atmospheric flow regimes using targeted field sampling and synoptic analysis; and 3) delineate the spatial footprint of past ENSO events by tying together data from the first two objectives with existing reconstructions of drought and ENSO.The broader impacts include supporting a new female investigator early in her career, the education and training of a graduate student, and the inclusion of a number of undergraduates in field and lab research. The work would be relevant for water managers and others interested in the hydroclimate of the Western U.S. while the gridded pressure reconstruction would be of value to other climate researchers.

研究人员将使用天气树状气候学检查美国西部的氢化气候变异性及其与El Nino/Southern振荡（ENSO）的关系。概要树突气候学以一种基于过程的方法与局部树木生长异常联系起来的基于过程的方法中整合了概要气候和树突年代学。研究人员认为，由于影响模式的不稳定性以及其他大气控制对美国西部气候模式的影响，很难应用现有的ENSO重建来评估源外区域的ENSO影响，这是研究的三个主要目标。 2）确定使用靶向场采样和天气分析对持续的子午线和区域大气流程进行的控制； 3）通过将前两个目标的数据与现有的干旱和ENSO重建结合在一起，描述了过去的ENSO事件的空间足迹。更广泛的影响包括在职业生涯的早期支持一名新的女性调查员，对研究生的教育和培训，以及在现场和实验室研究中包括许多小学生。这项工作将与对美国西部氢化气候感兴趣的水管理人员和其他对其他气候研究人员有价值的压力重建相关。