Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Growing Season NDVI, 2009-2017

The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release 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?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. The Normalized Difference Vegetation Index (NDVI) was measured using a specialized handheld camera at individual plots throughout the 2009-2016 growing seasons.

多年冻土碳实验加热研究（Carbon in Permafrost Experimental Heating Research, CiPEHR）项目旨在解答如下科学问题：1. 生态系统升温是否会引发碳从生态系统净释放至大气？2. 占土壤碳库主体的老碳分解过程，是否会对生态系统碳流失产生影响？3. 单独开展及联合实施的冬季、夏季升温，会如何影响生态系统碳交换？本项目结合野外与室内实验手段，在位于阿拉斯加山脉山麓、阿拉斯加希利附近的高地苔原场地的升温实验样地中，测定生态系统碳平衡与放射性碳同位素比值。研究团队于2009-2016年的生长季期间，通过专用手持相机对各实验样地的归一化差异植被指数（Normalized Difference Vegetation Index, NDVI）进行了测量。