Precipitation data for B1 chart recorder, 1952 - 1964.

Precipitation data were collected from a ridgetop climate station east of Niwot Ridge (B1 at 2591 m) throughout the year using a chart recorder. Initially, instrumentation consisted of an 8-inch metal rain gauge with the receiving rim about 3 feet above the ground and measurements were made on an approximately weekly basis. More recently, instrumentation consisted of a Fergusson-type weighing rain gauge. Precipitation was caught in a bucket containing ethylene glycol (to melt snow) and light oil (to prevent evaporation). As the weight of the bucket increased, the pen moved up via a spring mechanism and recorded on a rotating chart. Precipitation was recorded on a continuous basis.

本数据集的降水数据全年通过图表记录仪采集自尼沃特岭（Niwot Ridge）东侧的山脊气候站（B1站点，海拔2591米）。初期观测所用仪器为口径8英寸的金属雨量筒，其接收边缘距地面约3英尺，观测频次约为每周1次。后续更新的观测仪器为弗格森（Fergusson）型称重式雨量计：降水收集于内置乙二醇（ethylene glycol，用于融雪）与轻质油（用于抑制蒸发）的盛水桶中，当盛水桶重量增加时，记录笔通过弹簧传动机构抬升，并在旋转式记录图表上完成记录，实现降水的连续观测。