DEPRECATED: Hubbard Brook Experimental Forest (USDA Forest Service): Soil Frost Measurements, 1955 - present

This dataset has been DEPRECATED. The full timeline of these data can be found in: USDA Forest Service, Northern Research Station. 2023. Hubbard Brook Experimental Forest: Weekly Snow and Frost Measurements, 1955 - present ver 18. Environmental Data Initiative. https://doi.org/10.6073/pasta/5e1c5cb3aae2391cda9ca3ab4487046c. Soil frost measurements have been collected approximately weekly during the winter season using transect s adjacent to the established network of standard rain gages from 1956 to the present. Soil frost data is collected in conjunction with snow depth measurements along each snow course. The ground is probed with a ski pole to detect the presence or absence of frost at 2 points adjacent to each of the 10 snow sample points. At the first 2 points for which frost is detected, the soil is excavated and frost thickness is measured. Data from one course are averaged for each collection date. 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.

本数据集已弃用（DEPRECATED）。完整的数据集时间线可参阅：美国农业部林务局北方研究站（USDA Forest Service, Northern Research Station）. 2023. 哈伯布鲁克实验林：1955年至今每周积雪与霜冻测量数据 版本18. 环境数据倡议组织（Environmental Data Initiative）. https://doi.org/10.6073/pasta/5e1c5cb3aae2391cda9ca3ab4487046c。自1956年至今，研究人员于冬季通过毗邻标准雨量计已建网络的样带，每周采集土壤霜冻测量数据。土壤霜冻数据与沿每条积雪样线的积雪深度测量数据同步采集。在10个积雪采样点各自相邻的2个点位，使用滑雪杖探测地面是否存在霜冻；在首批检测到霜冻的2个点位，开挖土壤并测量霜冻厚度。每次采集日期的单条样线数据均会取平均值。本数据集为哈伯布鲁克生态系统研究（Hubbard Brook Ecosystem Study, HBES）的一部分。哈伯布鲁克生态系统研究是在哈伯布鲁克实验林开展的合作项目，该实验林由美国农业部林务局北方研究站运营维护。