Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): CiPEHR dates snow-free 2010-2025

The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. This data set includes weekly thaw depth measurements collected from winter warming, summer warming, and control treatment plots at CiPEHR. Additional measurements from on-plot gas flux wells, water table monitoring wells, and off-plot locations are also reported. Note that the experimental warming portion of this experiment concluded in 2022. These data are a continuation of measurements taken at previously warmed plots but plots were not actively manipulated in 2023.

永久冻土碳实验加热研究（Carbon in Permafrost Experimental Heating Research, CiPEHR）项目旨在解答以下三项科学问题：1）生态系统升温是否会引发碳从生态系统向大气的净释放？2）占土壤碳库主体的老旧碳分解过程，是否会对生态系统碳流失产生影响？3）单独实施及联合开展的冬季、夏季升温，分别会如何影响生态系统碳交换？本研究通过结合野外实验与实验室实验，在位于阿拉斯加山脉山麓、阿拉斯加希利附近的高地苔原实验场地的升温实验中，测量生态系统碳平衡与放射性碳同位素比值，以解答上述问题。本数据集涵盖冬季升温组、夏季升温组与对照组样地的每周解冻深度测量数据，同时还包含样地内气体通量井、地下水位监测井以及样地外点位的补充测量结果。需特别说明，本实验的主动升温干预环节已于2022年结束；2023年未对样地开展主动调控操作，仅保留了此前升温样地的持续性测量工作。