Snow water equivalent data at the Poker Flat Research Range (PFRR) during the winter of 2022-2023

At the Poker Flat Research Range of the University of Alaska Fairbanks, the CS725 sensor is installed to observe snow water equivalent (SWE). The CS725 is, in fact, a gamma radiation spectrometer specifically designed for the purpose of measuring SWE. Natural gamma radiation from the ground is produced by traces of long-lived radioactive elements contained within it. The most abundant of these elements are Potassium-40 (40K) and Thallium-208 (208Tl). The estimates of snow water equivalent due to these elements (40K and 208Tl) are represented by "CS725_SWE_K_mm" and "CS725_SWE_TL_mm," respectively. The data is observed at 6-hour intervals, with blanks indicating missing values. The CS725 is manufactured by CAMPBELL SCIENTIFIC, INC.在阿拉斯加费尔班克斯大学的波克尔弗拉特研究场（Poker Flat Research Range）内，部署了CS725传感器以观测雪水当量（snow water equivalent, SWE）。事实上，CS725是一款专为测量雪水当量研发的伽马辐射光谱仪（gamma radiation spectrometer）。地表天然伽马辐射由土壤中含有的微量长寿命放射性元素产生。其中丰度最高的两种元素为钾-40（Potassium-40, 40K）和铊-208（Thallium-208, 208Tl）。由这两种元素计算得到的雪水当量估算值，分别以字段名“CS725_SWE_K_mm”和“CS725_SWE_TL_mm”表示。该数据集的观测间隔为6小时，空值代表数据缺失。CS725传感器由坎贝尔科学公司（CAMPBELL SCIENTIFIC, INC.）制造。