Maquarie Island Research Station - Atmospheric CO2 level (LOFLO) measurements (2005 to present)

The CSIRO archive of observed atmospheric CO2 concentrations at the Maquarie Island Research Station, measured with the CSIRO developed LOFLO Mk2 instrument. LOFLO is an analysis system built around a commercial LI-COR 6251 optical bench which utilizes NDIR (non-dispersive infrared) gas analysis technology to measure CO2 concentrations in sample air. Consuming smaller volumes of calibration gases (approx. 15ml/min) and requiring much less operator intervention, LOFLO measurements have significantly less bias than traditional NDIR measurement techniques. Measurements using LOFLO first began at Cape Grim in May 2000 and has since been expanded to other global stations with the newer improved LOFLO Mk2. Stations using LOFLO include Cape Grim, Maquarie Island, Otways Basin and Aspendale. CO2 measurements are available from the Maquarie Island Research Station for the period 1/1/05 until present, with logged data available as yearly ascii text files in hourly averaged and minutely averaged periods for CO2 concentration, standard deviation, max & min values as well as a baseline flag. Typically file size is approximately 500 KB and 12 MB for an hourly averaged and minutely averaged year of data respectively.

澳大利亚联邦科学与工业研究组织（CSIRO）建立的麦夸里岛研究站大气CO₂浓度观测数据集，其观测采用CSIRO研发的LOFLO Mk2型仪器完成。LOFLO是一套基于商用LI-COR 6251光学平台的分析系统，采用非色散红外（non-dispersive infrared，简称NDIR）气体分析技术对采样空气中的CO₂浓度进行测定。该系统校准气体消耗量更低（约15毫升/分钟），且所需人工干预更少，因此LOFLO观测的系统偏差显著低于传统NDIR测量技术。LOFLO观测最早于2000年5月在格雷姆角启动，后续借助升级优化后的新型LOFLO Mk2仪器，观测站点已扩展至全球其他多地。采用LOFLO系统的观测站点包括格雷姆角、麦夸里岛、奥特韦斯盆地和阿斯彭代尔。麦夸里岛研究站的CO₂浓度观测数据覆盖2005年1月1日至今的时段，已记录的数据以年度ASCII文本文件形式提供，包含CO₂浓度、标准差、最大值、最小值以及基线标记的小时平均和分钟平均数据。单年度小时平均数据集与分钟平均数据集的文件大小通常分别约为500 KB和12 MB。