Long term response of arctic tussock tundra to thermal erosion features: A modeling analysis. Tussock tundra regrowth after a thermal erosion event: Simulation D - reduced Phase I and Phase II 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 reduced Phase I and Phase II 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）模型用于模拟阿拉斯加北极草垫苔原在冻土融化与块体运动引发的热侵蚀特征（thermal erosion features, TEFs）后的恢复过程。由于冻土土壤储存了大量土壤有机质（soil organic matter, SOM），且随着气候变暖热侵蚀特征的发生频率预计将升高，因此热侵蚀特征对区域碳（C）与养分收支可能产生显著影响。本系列模拟仅聚焦于热侵蚀特征稳定后的恢复过程，未涉及热侵蚀特征形成阶段碳与养分的初始流失情况。为了捕捉热侵蚀特征间及单个热侵蚀特征内部的异质性，我们通过改变土壤有机质库的初始规模与养分供给速率，模拟了一系列热侵蚀特征稳定后的环境条件。 本数据集文件包含热侵蚀事件发生后草垫苔原长达100年的恢复过程模拟结果。本次模拟相较于基准模拟，其热侵蚀特征恢复过程中的第一阶段与第二阶段土壤有机质含量有所降低。数据以每年第250天的模拟值形式呈现。