Long term response of arctic tussock tundra to thermal erosion features: A modeling analysis. Tussock tundra regrowth after a thermal erosion event: Simulation B - increased Phase I soil organic matter

The Multiple Element Limitation (MEL) model is used to simulate the recovery of Alaskan arctic tussock tundra to thermal erosion features (TEFs) caused by permafrost thaw and mass wasting. TEFs could be significant to regional carbon (C) and nutrient budgets because permafrost soils contain large stocks of soil organic matter (SOM) and TEFs are expected to become more frequent as climate warms. These simulations deal only with recovery following TEF stabilization and do not address initial losses of C and nutrients during TEF formation. To capture the variability among and within TEFs, we simulate a range of post-stabilization conditions by varying the initial size of SOM pools and nutrient supply rates.
This file contains the results for 100 years of tussock tundra recovery after a thermal erosion event. This simulation is of TEF recovery with increased Phase I soil organic matter compared to the base simulation. Data is presented for day 250 of each year.

多元素限制（Multiple Element Limitation, MEL）模型被用于模拟阿拉斯加北极丛状苔原对由冻土融化与块体运动引发的热侵蚀特征（thermal erosion features, TEFs）的恢复过程。冻土土壤储存了巨量土壤有机质（soil organic matter, SOM）库，且随着气候变暖，热侵蚀特征（TEFs）的发生频率预计将持续升高，因此该类特征对区域碳（C）与养分收支或具有显著影响。本模拟仅聚焦热侵蚀特征（TEFs）稳定后的恢复过程，未涉及热侵蚀特征（TEFs）形成阶段初始的碳与养分流失环节。为刻画热侵蚀特征（TEFs）之间及内部的异质性，我们通过调整土壤有机质库初始规模与养分供给速率，设置了多组稳定后的模拟场景。本文件包含热侵蚀事件发生后100年的丛状苔原恢复模拟结果。本次模拟为热侵蚀特征（TEFs）恢复场景，相较于基准模拟，其第一阶段土壤有机质含量有所提升。数据以每年第250天的观测结果形式呈现。