VOC_OHP_Canopee2014_10m

Volatile Organic Compounds concentrations in unit ppb measured with a Proton Transfer Reaction Mass Spectrometer (quadrupole MS, Ionicon Analytik, Austria) at the site Observatoire de Haute Provence, a Mediterranean Forest dominated by Downy Oak trees. Data were collected at 10 m height (above the canopy height), background subtracted. Time resolution is 5 min. Time is local (CEST, UTC+2h). Missing values are due to switching conditions between different measurement heights. See the manuscript Zannoni et al., 2016 for details about the identification of the chemical compounds from the masses analysis.本数据集记录了以十亿分之一体积分数（ppb）为单位的挥发性有机化合物（Volatile Organic Compounds）浓度数据，测量采用产自奥地利Ionicon Analytik公司的质子转移反应质谱仪（Proton Transfer Reaction Mass Spectrometer，四极杆质谱（quadrupole MS）），采集地点为上普罗旺斯天文台（Observatoire de Haute Provence）的一片以柔毛栎（Downy Oak）为优势树种的地中海森林。数据采集于林冠上方10米高度，且已扣除背景信号。时间分辨率为5分钟，时间采用中欧夏令时（CEST，UTC+2）。缺失值源于不同测量高度间的切换流程。有关基于质谱分析的化合物定性细节，请参阅Zannoni等人2016年发表的研究手稿。