Eight Mile Lake Research Watershed,Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): Methane chamber flux data, 2016 - 2018

This drying and warming experiment addresses the following questions: 1) Does ecosystem drying, warming and permafrost thaw cause a net release or uptake of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss? 3) How do drying and warming affect plant communities and ecosystem properties? We are answering these questions using a combined warming and drying experiment (DryPEHR), which is situated with the Carbon in Permafrost Experimental Heating Research (CiPEHR) project and located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. Warming treatment here refers to growing season air temperature warming (~1C) using open top chambers (OTC) combined with soil 'warming' using snow fences during the snow covered months. Drying is achieved using an automated pumping system that lowers the water table in the dry plots. Soil warming began in 2008; OTCs and drying in 2011. *** ADD YOUR OWN DATA SPECIFIC DETAILS HERE本干湿增温实验旨在解答以下科学问题：1. 生态系统干湿化、增温及冻土消融是否会引发碳从生态系统向大气的净释放或净吸收？2. 占土壤碳库主体的老旧碳的分解过程，是否会对生态系统碳流失产生影响？3. 干湿化与增温会如何影响植物群落与生态系统属性？本研究依托干湿增温联合实验平台（DryPEHR）解答上述问题，该平台与冻土碳实验加热研究（CiPEHR）项目共建，设于阿拉斯加山脉山麓、阿拉斯加州希利镇附近的高地苔原野外站点。本实验的增温处理方案为：在生长季利用顶部开放式气室（open top chambers, OTC）实现空气增温（约1℃），并在积雪期利用雪篱实现土壤‘增温’。干湿化处理则通过自动化抽水系统降低干旱样地的地下水位实现。土壤增温实验于2008年启动，而OTC气室安装与干湿化处理则于2011年同步开展。*** 请在此处补充您的专属数据细节 ***