Incubation Data Assessing Biodegradability of Organic Carbon Mobilized from Permafrost Thaw Slumps (Peel Plateau, NT, Canada)

Upon thaw, permafrost carbon may be mineralized into CO2 or re-sequestered into sediments. The balance between these processes is an important uncertainty in the permafrost-carbon-climate feedback. Warming and wetting in the western Canadian Arctic are accelerating thaw-driven mass wasting by permafrost thaw slumps along headwater streams, increasing particulate organic carbon (POC) delivered to streams by orders of magnitude. This dataset shows changes in oxygen concentrations and organic carbon for incubations assessing the biodegradability of organic carbon released from thaw slumps on the Peel Plateau, NWT. Various other geochemical parameters are also collected for select incubations.

永久冻土（permafrost）在解冻后，其固存的碳可被矿化生成二氧化碳（CO₂），或重新固存于沉积物中。这两种过程的相对平衡，是永久冻土-碳-气候反馈系统中一项关键的不确定性来源。加拿大北极西部的升温与增湿作用，正通过源头溪流沿线的永久冻土热融滑塌，加速冻土解冻引发的土体侵蚀过程，使输送至溪流的颗粒有机碳（POC）含量提升数个数量级。本数据集记录了加拿大西北地区（NWT）皮尔高原上，为评估热融滑塌释放的有机碳的生物可降解性所开展的培养实验中，氧浓度与有机碳的变化情况。部分选定的培养实验还同步采集了其他多种地球化学参数。