Influence of permafrost type and site history on losses of permafrost carbon after thaw

Collapse-scar bog expansion rates at our sites were not related to feature size and may have been more influenced by local factors.In contrast to other studies from Interior Alaska, we did not find large losses of C with permafrost thaw.Along with other factors of time, the timing of permafrost aggradation relative to the timing of peat accumulation is important in determining how much carbon is lost with thaw.

本研究样地内的塌陷痕沼泽（collapse-scar bog）扩张速率与斑块规模无显著相关性，其扩张过程更易受局地环境因素调控。与阿拉斯加内陆（Interior Alaska）的既往研究不同，本研究未观测到冻土融化（permafrost thaw）引发的大规模碳（Carbon）损失。除其他时间维度相关因素外，冻土加积（permafrost aggradation）相较于泥炭堆积（peat accumulation）的时间节点，在决定冻土融化引发的碳损失量方面发挥着关键作用。