Climate Change Across Seasons Experiment (CCASE) at the Hubbard Brook Experimental Forest: Soil and Air Temperature

Soil temperature was measured on all Climate Change Across Seasons Experiment (CCASE) plots. Reference (or control) plots are shared with the collaborating Northern Forest DroughtNet experiment. There are six plots total (each 11 x 14m). Two are warmed 5 degrees C throughout the growing season (Plots 3 and 4). Two others are warmed 5 degrees C in the growing season and have snow removed during winter to induce soil freeze/thaw cycles (Plots 5 and 6). Four kilometers (2.5 mi) of heating cable are buried in the soil to warm these four plots. Two additional plots serve as controls for our experiment (Plots 1 and 2). This data set includes tree dbh measurements for 2012. 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.

本数据集针对跨季节气候变化实验（Climate Change Across Seasons Experiment, CCASE）的全部样地开展土壤温度监测。参照（或对照）样地与合作开展的北方森林干旱网络（Northern Forest DroughtNet）实验共享。实验共设6块样地，单块样地面积为11×14米。其中2块样地在整个生长季内维持5℃升温处理（样地3与样地4）；另有2块样地在生长季实施5℃升温，且冬季移除积雪以诱发土壤冻融循环（样地5与样地6）。上述4块升温样地的土壤中埋设有总长4千米（2.5英里）的加热电缆。剩余2块样地作为本实验的对照样地（样地1与样地2）。本数据集包含2012年的树木胸径（Diameter at Breast Height, dbh）测量数据。这些数据作为哈伯德布鲁克生态系统研究（Hubbard Brook Ecosystem Study, HBES）的一部分采集获取。HBES是依托哈伯德布鲁克实验林开展的协作研究项目，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。