Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): leaf C, N, delta-13-C, delta-N-15 2011-2016.

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 warmign 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 achieve using an automated pumping system that lowers the water table in the dry plots. Soil warming began in 2008; OTCs and drying in 2011. This data set includes foliar %C, %N, delta-13-C, delta-N-15 from green leaves collected in July and from senesced leaves collected in September.

本干湿增温实验旨在解答以下科学问题：1）生态系统干旱化、增温与冻土融化是否会导致生态系统向大气发生碳的净释放或净吸收？2）占土壤碳库主体的老旧碳分解是否会影响生态系统碳流失？3）干旱化与增温会如何影响植物群落与生态系统属性？
本研究依托与永久冻土碳实验加热研究（Carbon in Permafrost Experimental Heating Research, CiPEHR）项目共建的干湿增温实验平台（DryPEHR），该站点位于阿拉斯加山脉山麓、阿拉斯加希利镇附近的高地苔原野外观测场。
本实验的增温措施为：生长季利用开顶箱（Open Top Chambers, OTC）实现空气温度增温（约1℃），并在积雪期通过雪栅栏实现土壤增温；干旱化处理则通过自动化抽水系统降低干旱样地的地下水位。
土壤增温实验始于2008年，而开顶箱布设与干旱化处理始于2011年。
本数据集包含7月采集的鲜绿叶片与9月采集的枯落叶的叶片碳百分含量（%C）、氮百分含量（%N）、碳稳定同位素比值δ¹³C以及氮稳定同位素比值δ¹⁵N数据。