Imnavait Watershed Thaw Depth Survey Summary for 2003 to 2009, Arctic LTER, Toolik Research Station, Alaska.

Thaw depth measurements in the Imnavait Creek watershed from 2003 to 2009. Depths were measured weekly to biweekly during the summer season, June to late August. A ruled stainless steel rod was inserted in non tussock microhabitat until the frozen layer was reached, and the distance was measured to the top of the organic mat (beneath the uppermost moss). Three measurements were made at each point, and were made within a 20 cm radius of each location point.本数据集记录了2003年至2009年伊纳夫奈特溪流域（Imnavait Creek watershed）的融化深度（thaw depth）测量结果。测量于夏季（6月至8月下旬）开展，频率为每周至每两周一次。测量时，将带刻度不锈钢杆插入非草丘微生境，直至触及冻土层，随后测量至有机垫（位于最上层苔藓下方）顶部的距离。每个测点需完成三次测量，且所有测量操作均需在该测点周边20厘米半径范围内进行。