Photosynthetically Active Radiation data taken with the Delta-T SunScan wand every 15 cm of 1m x 1m chamber flux and point frame plots as well as four remotely monitored canopies at the Toolik Field Station in AK, Summer 2012.

Within-canopy PAR was measured with a Delta-T SunScan wand every 15 cm from the ground to above the canopy under both direct and diffuse light. The data includes all outputs from the SunScan wand: time of measurement, spread of PAR sensors, total irradiance, total diffuse light, and individual outputs of 64-PAR sensors on the SunScan wand. These measurements were taken for 1m x 1m chamber flux (n=14) and point frame (n=19) plots as well as sites four montitored remotely by PAR sensors located above, within, and below shrub canopies. All plots were dominated either by tall Salix pulchra and Betula nana species and were located near the LTER shrub plots at Toolik Field Station , AK in the summer of 2012.冠层内光合有效辐射（Photosynthetically Active Radiation，PAR）采用Delta-T SunScan手持探头进行测量，在直射光与散射光条件下，从地面直至冠层上方，每隔15厘米采集一次数据。本数据集包含SunScan手持探头的全部输出项：测量时刻、PAR传感器阵列分布参数、总辐照度、总散射光强，以及探头上64个PAR传感器的单通道输出数据。本次测量覆盖1m×1m规格的箱式通量（n=14）和点框架（n=19）样地，同时包含4个通过分别安装在灌木冠层上方、内部与下方的PAR传感器开展远程监测的样点。所有样地均以高大的美丽柳（Salix pulchra）和矮桦（Betula nana）为优势物种，数据采集工作于2012年夏季在阿拉斯加州图利克野外站（Toolik Field Station）的长期生态研究（Long-Term Ecological Research, LTER）灌木样地附近完成。