Long term response of arctic tussock tundra to thermal erosion features: A modeling analysis. A 100 yr old thermal erosion event response to P fertilization.

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 a 100yr old TEF response to P fertilization over 25 years.

多元素限制（Multiple Element Limitation, MEL）模型被用于模拟阿拉斯加北极草丛苔原对由冻土融化与重力侵蚀引发的热侵蚀地貌（thermal erosion features, TEFs）的恢复过程。热侵蚀地貌（TEFs）对区域碳（C）与养分收支具有重要影响，因冻土土壤储存有大量土壤有机质（soil organic matter, SOM），且随着气候变暖，TEFs的发生频率预计将进一步提升。本类模拟仅聚焦热侵蚀地貌稳定后的苔原恢复过程，未涉及热侵蚀地貌形成阶段的碳与养分初始流失过程。为捕捉不同热侵蚀地貌之间及同一热侵蚀地貌内部的异质性，我们通过调整土壤有机质库的初始规模与养分供给速率，模拟了多组稳定后的环境条件。
本文件包含了一处形成时长达100年的热侵蚀地貌，在25年观测周期内对磷肥施加的响应结果。