Arcturus Emerald Flux Data Release 2023_v2

This release consists of flux tower measurements of the exchange of energy and mass between the surface and the atmospheric boundary-layer using eddy covariance techniques. Data were processed using PyFluxPro (v3.4.15) as described by Isaac et al. (2017). PyFluxPro produces a final, gap-filled product with Net Ecosystem Exchange (NEE) partitioned into Gross Primary Productivity (GPP) and Ecosystem Respiration (ER).

The Arcturus greenhouse gas (GHG) monitoring station was established in July 2010, 48 km southeast of Emerald, Queensland. Flux tower measurements were carried out from June 2011 to early 2014. The station was part of a collaborative project between Geoscience Australia (GA) and CSIRO Marine and Atmospheric Research (CMAR). The elevation of the site is approximately 170 m asl and mean annual precipitation is 572 mm. The tower bordered 2 land use types to the west lightly forested tussock grasslands; to the east crop lands, cycling through fallow periods. The instruments were installed on a square lattice tower with an adjustable pulley lever system to raise and lower the instrument arm. The tower was 5.6 m tall with the instrument mast extending a further 1.1 m above, totalling a height of 6.7 m. Fluxes of heat, water vapour, methane and carbon dioxide were measured using the open-path eddy flux technique. Supplementary measurements above the canopy included temperature, humidity, windspeed, wind direction, rainfall, and the four components of net radiation. Soil heat flux, soil moisture and soil temperature measurements were also collected.

本数据集包含利用涡度协方差技术（eddy covariance techniques）通过通量塔（flux tower）测得的地表与大气边界层之间的能量和物质交换数据。数据处理采用Isaac等人（2017）所述的PyFluxPro软件（v3.4.15）。PyFluxPro生成经间隙填补的最终产品，其中净生态系统交换量（Net Ecosystem Exchange, NEE）被划分为总初级生产力（Gross Primary Productivity, GPP）和生态系统呼吸（Ecosystem Respiration, ER）。

Arcturus温室气体（greenhouse gas, GHG）监测站于2010年7月建成，位于澳大利亚昆士兰州埃默拉尔德（Emerald, Queensland）东南方向48公里处。通量塔观测于2011年6月至2014年初开展。该站是澳大利亚地质科学局（Geoscience Australia, GA）与澳大利亚联邦科学与工业研究组织（CSIRO）海洋与大气研究所（Marine and Atmospheric Research, CMAR）合作项目的一部分。站点海拔约170米（asl），年平均降水量为572毫米。通量塔西侧毗邻轻度森林化的丛生草原，东侧为农田（含休耕期轮换）两种土地利用类型。仪器安装在方形格构塔上，配备可调滑轮杠杆系统以升降仪器臂。塔身高度5.6米，仪器桅杆再向上延伸1.1米，总高度达6.7米。采用开路涡度通量技术（open-path eddy flux technique）测量热量、水蒸气、甲烷及二氧化碳通量。冠层上方的补充观测包括温度、湿度、风速、风向、降雨量及净辐射的四个分量。此外，还采集了土壤热通量、土壤湿度和土壤温度数据。