Weather Station Data on the Juneau Icefield

Since the 1940s, the Juneau Icefield Research Program (JIRP) has been measuring surface mass balance on the Juneau Icefield. This is the longest ongoing program of its kind in North America. The program nominally occurs between late June and late August, traversing between Juneau, Alaska and Atlin, British Columbia. JIRP has examined the surface mass balance of the Juneau Icefield since 1946, with principal efforts focused on Lemon Creek Glacier and Taku Glacier. Glaciological, geodetic, and meteorological data have been collected by JIRP to characterize the interaction between the climate and glaciers of the Juneau Icefield. Measurements of meteorological data are made at many permanent camp facilities on the Juneau Icefield. This portion of the data release includes select weather data that has received basic quality control and assurance. Data is released at three different levels of processing, level 0, 1 and 2. Level 0 data contains compiled raw data, before QC procedures are applied, at the original timestep recorded by the instrument. Level 1 data has received a plausible value check, and minimal manual error identification (e.g. errors noted on field visits). Level 2 data has been through more extensive quality control procedures and is provided at both the original instrument timestep as well as aggregated hourly and daily values. Data at many JIRP sites consist of a single temperature sensor, recording in a Stevenson-type shield. Automated weather stations at Camp 10, 17, and 18 have measured additional meteorological variables in recent years. Both are presented in this data release.

自20世纪40年代起，朱诺冰原研究计划（Juneau Icefield Research Program, JIRP）便持续对朱诺冰原开展地表质量平衡测量工作，该项目是北美地区同类持续研究项目中时长最久的一项。
该项目通常于6月末至8月末间实施，行进路线覆盖阿拉斯加州朱诺市与不列颠哥伦比亚省阿特林之间的区域。
JIRP自1946年起便对朱诺冰原的地表质量平衡展开研究，核心研究重点集中于利蒙溪冰川（Lemon Creek Glacier）与塔库冰川（Taku Glacier）。
该计划还收集了冰川学、大地测量学与气象学相关数据，以解析朱诺冰原区域气候与冰川间的相互作用特征。
气象数据的测量工作依托朱诺冰原上的多处永久营地设施完成。
本次发布的数据集包含经过基础质量控制与质量保障处理的精选气象数据。
该数据集按照三种不同的处理层级进行发布，即0级（Level 0）、1级（Level 1）与2级（Level 2）数据。
0级数据为未应用任何质量控制（QC）流程的原始汇编数据集，保留仪器记录的原始时间步长。
1级数据已完成合理值校验，并开展了初步的人工错误识别工作，例如野外考察期间记录的异常值。
2级数据则经过了更全面的质量控制流程，既保留仪器原始时间步长的原始数据，同时也提供按小时、按日聚合后的数据集。
朱诺冰原上多数监测点位仅配备单支温度传感器，安装于斯蒂文森式防辐射罩（Stevenson-type shield）内进行数据记录。
近年来，10号、17号及18号营地的自动气象站新增了其他气象变量的测量功能，上述两类数据均已纳入本次发布的数据集当中。