Long term response of arctic tussock tundra to thermal erosion features: A modeling analysis. Tussock tundra recovery after a thermal erosion event: saturating nutrients.

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 under saturating nutrient conditions. 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。热侵蚀特征对区域碳（C）与养分收支具有重要意义，因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显著升高。本模拟仅聚焦热侵蚀特征稳定后的苔原恢复过程，未涉及热侵蚀形成阶段初始的碳与养分流失环节。为了刻画热侵蚀特征之间以及单个热侵蚀特征内部的异质性，我们通过调整土壤有机质库的初始规模与养分供给速率，设置了一系列稳定后的模拟场景。
本文件包含了热侵蚀事件发生后100年尺度的丛状苔原恢复模拟结果，该模拟针对饱和养分条件下的热侵蚀特征恢复过程，所呈现的数据为每年第250天的模拟结果。