Water-level and subsurface water temperature at sensor from the Toolik River Thermokarst, 2010-2013

Data were collected to investigate if formation of gully thermokarst (TK) results in lowering of the water table and more rapid evacuation of water from above the frost table. Data were collected from 24 shallow screened wells. 2 replicate rows of 4 wells were located at: (a) a hillslope (HS) ~120m away from the gully TK, (b) perpendicular to the gully TK (TK) and (c) perpendicular to an unimpacted water track (WT) upstream of the gully TK. Note that water levels are the distance below the ground surface and may have organic/peat layers of different thicknesses. Also note that sensors were progressively lowered deeper into the well during the season, resulting in steps in the temperature and raw depth data. Data were collected with support from the NSF ARCSS-TK project, (OPP – 0806399) .本数据集旨在探究沟壑热喀斯特（gully thermokarst, TK）的形成是否会引发地下水位下降，以及是否会加速冻土层上方水体的排逸过程。数据采集自24口浅层过滤井，共设置2组重复采样列，每列包含4口井，布设位置分别为：(a) 距离沟壑热喀斯特约120米的山坡（hillslope, HS）区域；(b) 垂直于沟壑热喀斯特的区域（TK）；(c) 位于沟壑热喀斯特上游、垂直于未受干扰水道（water track, WT）的区域。需注意，水位数值代表地表以下的深度，且测量区域可能存在厚度各异的有机层或泥炭层。另需注意，本研究季期间，传感器被逐步下放至井内更深位置，致使温度数据与原始深度数据出现阶跃式变化。本数据集的采集工作得到了NSF ARCSS-TK项目（OPP – 0806399）的资助。