Ice thickness measurements from the Ice Storm Experiment (ISE) at the Hubbard Brook Experimental Forest

An ice storm simulation was performed at the Hubbard Brook Experimental Forest to evaluate impacts of these extreme weather events on northern hardwood forests. Water was pumped from the main branch of Hubbard Brook and sprayed above the forest canopy in subfreezing conditions so that it rained down and froze on contact with trees. The experiment consisted of five treatments, including a control (no ice) and three target levels of radial ice accretion: low (6.4 mm), mid (12.7 mm), and high (19.0 mm). Two of the mid-level treatment plots (midx2) were iced in back-to-back years to evaluate impacts of consecutive storms. The ice accretion values reported are measurements made on passive collectors using both digital calipers and a water volume approach. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.

本研究于哈伯德布鲁克实验林（Hubbard Brook Experimental Forest）开展冰风暴模拟实验，以评估这类极端天气事件对北部硬木林的影响。研究人员从哈伯德布鲁克干流取水，在亚冰点环境下向林冠上方喷淋，使水滴下落并在接触树木时冻结成冰。本次实验共设置5组处理，包括1组对照组（无覆冰）与3组目标径向覆冰厚度梯度：低（6.4 mm）、中（12.7 mm）和高（19.0 mm）。其中2块中水平处理样地（记为midx2）在连续两年开展覆冰处理，以评估连续冰风暴的影响效应。本研究报道的覆冰量数据通过被动收集器测得，测量方法同时采用了数显卡尺与水体体积法。这些数据作为哈伯德布鲁克生态系统研究（Hubbard Brook Ecosystem Study, HBES）的一部分收集得到。哈伯德布鲁克生态系统研究是在哈伯德布鲁克实验林开展的合作研究项目，该实验林由美国农业部林务局北部研究站（USDA Forest Service, Northern Research Station）运营维护。