Snow horizon chemistry data for Niwot Ridge and Green Lakes Valley, 1993 - ongoing.

Snow pits were excavated at various locations on Niwot Ridge and within the Green Lakes Valley. Temperature and snow density were measured at various depths throughout the snow cover profiles in order to characterize the temperature and snow water equivalent (SWE) of the snowpack throughout the year. Snow density was measured at 10-cm intervals using a 1000-ml cutter. Data on snow grain qualities were collected beginning in the 1994-95 snow season. Snow samples were collected and analyzed for cations and anions at the Mountain Research Station's Arikaree (formerly Kiowa) Laboratory.

本研究在尼沃特岭（Niwot Ridge）与绿湖谷（Green Lakes Valley）的多个点位开挖雪坑。沿完整雪层剖面的不同深度测定温度与雪密度，以表征全年积雪的温度与雪水当量（snow water equivalent, SWE）特征。雪密度采用1000毫升取样器以10厘米的间隔进行测定。自1994-1995年雪季起，开始收集雪粒特征相关数据。研究人员在山地研究站的阿里卡里（原基奥瓦）实验室采集雪样，并对其中的阳离子与阴离子开展分析测试。