• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Winter in the ouachitas - three manuscripts on shortleaf pine (Pinus echinata mill.) and severe winter storms.
【24h】

Winter in the ouachitas - three manuscripts on shortleaf pine (Pinus echinata mill.) and severe winter storms.

机译：在ouachitas的冬天-在短叶松树（Pinus echinata mill。）上的三篇手稿和严峻的冬季风暴。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Eleven new Pinus echinata Mill. site chronologies from the Ouachita Mountains are created and combined into a single master chronology. Stands used are naturally-regenerated even-aged stands from 31 to 229 years old. On high-quality sites, missing rings occur only in severe storm years. The Expressed Population Signal is greater than 0.85 for the years 1783 to 2009. Sample size exceeds thirteen trees from 1872 to 2009. It is suitable for use in dendroarcheology, dendroecology, climate change and weather studies. There is a listing of the master and component site chronologies in Tucson format. Historical records of severe winter storms only extend back to 1892; dendrochronology extends this to 1745. The winter storm signal is consistent with injury caused by trunk breakage, branch loss and severe bending. This suggests greater exposure by large crowned trees. Drought may be associated with winter storms; use of Palmer's Drought Severity Index to detrend data risks removal of the severe storm signal. Cohen's Kappa is used to test four different methods of storm detection in tree rings. Average storm recurrence interval is 17 years; two out of three known ice storms produce trunk breakage. Severe winter storm reconstructions are presented for thirteen study locations. Many variables affect tree breakage and height loss. Multiple linear regression and logistic models use total tree height, diameter and live crown ratio to predict the probability of trunk breakage and height loss. Total height, diameter and live crown ratio account for 22.3% of variation; height alone accounts for 15.4%. Logistic brekage probability models have p-values of 0.0001 (height) and 0.0277 (diameter). Further research might permit the separation of wind and ice storm signals and a means of estimating second and third-quarter precipitation and drought. Tree ring chronologies are a powerful tool for weather and climate studies at a finer scale than is possible with other proxy data.
机译：11个新的松果紫锥菊工厂。创建了沃希托山脉的站点年代，并将其组合为一个主要的年代。所使用的看台是年龄在31至229年之间的自然再生均匀年龄的看台。在高质量的站点上，仅在严重的风暴年份会发生丢失环。从1783年到2009年，表达的人口信号大于0.85。从1872年到2009年，样本量超过了13棵树。它适用于树状考古学，树状生态学，气候变化和天气研究。这里以Tucson格式列出了主站点和组件站点的时间顺序。严重冬季暴风雨的历史记录可追溯到1892年。树木年代学将其扩展到1745年。冬季风暴信号与树干破裂，分支丢失和严重弯曲造成的伤害相一致。这表明大型树冠树木的暴露量更大。干旱可能与冬季风暴有关；使用Palmer的干旱严重性指数来降低数据趋势可能会消除严重风暴信号。科恩的Kappa用于测试树环中四种不同的风暴检测方法。平均暴发间隔为17年；三分之二的已知冰暴会造成树干破裂。提出了针对13个研究地点的严冬风暴重建方案。许多变量会影响树木断裂和高度损失。多个线性回归和逻辑模型使用总树高，直径和活树冠比率来预测树干破损和高度损失的可能性。总高度，直径和活冠比率占变化的22.3％；仅身高就占15.4％。 Logistic折断概率模型的p值为0.0001（高度）和0.0277（直径）。进一步的研究可能允许风和冰暴信号的分离，以及估算第二和第三季度降水和干旱的手段。与其他代理数据相比，树环年表是一种更精细的天气和气候研究功能强大的工具。

著录项

  • 作者

    Stevenson, Douglas J.;

  • 作者单位

    Oklahoma State University.;

  • 授予单位 Oklahoma State University.;
  • 学科 Environmental Sciences.;Agriculture Forestry and Wildlife.;Climate Change.
  • 学位 Ph.D.
  • 年度 2013
  • 页码 125 p.
  • 总页数 125
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号