Transect snowpack ablation data for Niwot Ridge and Green Lakes Valley, 1992 - 1993.

Lowering of the snowpack surface by ablation (melt) was measured on a bimonthly basis within couloirs above the Green Lakes and Isabelle Valleys during the summer months. One-inch diameter PVC poles were driven into the snowpack to form vertical transects within each couloir. The height difference (cm) between the top of each pole and the snow surface was recorded. On the subsequent visit the new height difference was recorded and the pole driven into the snow and the reset height was recorded. Poles in a given transect were relocated as necessary during the course of the season.本研究于夏季时段内，在绿湖（Green Lakes）与伊莎贝尔谷（Isabelle Valleys）上方的雪槽中，以每两个月一次的频次，对由消融（融蚀）作用引发的积雪表层沉降量进行测量。研究人员将直径1英寸的PVC杆打入积雪层，以在每个雪槽内布设垂直样带，并记录每根测杆顶端与雪面之间的高度差（单位：厘米）。在后续每一次回访观测中，先记录新的高度差，随后将测杆重新打入积雪层并记录重置后的杆顶高度。在整个观测季期间，可根据实际需要对指定样带内的测杆进行重新定位。