Thaw front depth at the bottom, on the slopes and on the adjacent tundra polygons of two thermo-erosion gullies on Bylot Island, Nunavut, Canada

This dataset presents thaw front depths (TFD) measurements made in two thermo-erosional gullies on Bylot Island, Nunavut, Canada, from probing to refusal with a graduated steel rod. The first gully, TEG1, formed in 1999 and is still active today (2024). The second gully, TEG2, is a gully that has been stabilized for at least 66 years. TFD was measured in 2017 from 13 June to 29 July, and in 2018 from 12 June to 16 August. Measurements were made every 2-3 days along transects of ~30 points (10 to 30 m in length) perpendicular to the TEG and averaged into three positions: 1) shoulder of the gully (the polygon directly adjacent to the gully), 2) gully slope, 3) gully stream.

本数据集展示了在加拿大努纳武特地区比约特岛上两个热侵蚀沟中的融冻前沿深度（TFD）测量数据。测量采用渐长钢杆进行，直至拒绝。其中，第一个沟谷TEG1形成于1999年，至今仍保持活跃状态（截至2024年）。第二个沟谷TEG2已稳定至少66年。TFD于2017年6月13日至7月29日，以及2018年6月12日至8月16日进行测量。测量频率为每2-3天进行一次，沿与TEG垂直的约30个点（长度在10至30米之间）的横断面进行，并将数据平均分为三个位置：1）沟谷侧坡（直接相邻于沟谷的多边形），2）沟谷坡面，3）沟谷溪流。