Larch needle C/N and carbon and nitrogen isotopes at Spasskaya Pad

The dataset is C/N ratio and carbon and nitrogen isotopes of larch needles observed at Spasskaya Pad Experimental Forest in northeastern Siberia during the period from 1999 to 2019. Larch needles were sampled from four to eight trees in August and average values were calculated.本数据集收录了1999年至2019年间，于西伯利亚东北部斯帕斯卡亚帕德实验林（Spasskaya Pad Experimental Forest）观测获取的落叶松针叶碳氮比（C/N ratio）、碳同位素与氮同位素数据。研究人员于8月从4至8棵落叶松树上采集针叶样品，并计算得到其平均数值。