Wombat State Forest Flux Data Release 2022_v1

This data release consists of flux tower measurements of the exchange of energy and mass between the surface and the atmospheric boundary-layer in semi-arid eucalypt woodland using eddy covariance techniques. It been processed using PyFluxPro (v3.3.3) as described in Isaac et al. (2017), https://doi.org/10.5194/bg-14-2903-2017. PyFluxPro takes data recorded at the flux tower and process this data to a final, gap-filled product with Net Ecosystem Exchange (NEE) partitioned into Gross Primary Productivity (GPP) and Ecosystem Respiration (ER). For more information about the processing levels, see https://github.com/OzFlux/PyFluxPro/wiki. The Wombat State Forest site is a secondary re-growth forest that was last harvested in 1980. Dominant tree species are Eucalyptus obliqua (messmate stringybark), Eucalyptus radiata (narrow leaf peppermint) and Eucalyptus rubida (candlebark) with an average canopy height of 25m. The understorey consists mainly of patchy grasses and the soil is a silty-clay overlying clay. The forest is managed by the Department of Sustainability and Environment and management includes selective harvesting and prescribed burning regimes. The climate of the study area is classified as cool-temperate to Mediterranean zone with cold and wet winters (May-Aug) and warm and dry summers (Dec-Feb) with a temperature range: 1-30 °C and mean annual air temperature (2001-2012): 12.1°C. Annual rainfall is approximately 871 mm (142 year long-term average). Coherent automated measurements of soil greenhouse gas fluxes (CO2, CH4 and N2O) were collected using a trailer-mounted mobile laboratory – Fourier transform infra-red (FTIR) spectrometer from 2010 to 2016. Measurement height was 30m but increased to 33m from January 2017本数据集发布内容为：采用涡度相关（eddy covariance）技术，针对半干旱桉树林地开展的地表与大气边界层间能量与物质交换的通量塔观测数据。该数据集已按照Isaac等人（2017）提出的处理方法，借助PyFluxPro（v3.3.3）完成处理，相关研究的DOI链接为https://doi.org/10.5194/bg-14-2903-2017。PyFluxPro可将通量塔采集的原始观测数据处理为完成间隙填补的最终数据集，并将生态系统净交换（Net Ecosystem Exchange, NEE）划分为总初级生产力（Gross Primary Productivity, GPP）与生态系统呼吸（Ecosystem Respiration, ER）两个组分。如需了解更多关于数据处理层级的详细信息，请访问https://github.com/OzFlux/PyFluxPro/wiki。 袋熊州立森林样地为次生再生林，最后一次采伐作业发生于1980年。该样地的优势树种为斜叶桉（Eucalyptus obliqua，又名messmate stringybark）、辐射桉（Eucalyptus radiata，又名窄叶薄荷桉）以及红桉（Eucalyptus rubida，又名烛皮桉），林分平均冠层高度达25米。林下植被以斑块状草本群落为主，土壤为粉质黏土覆于黏土层之上。该森林由可持续与环境部负责管理，管理措施涵盖选择性采伐与计划火烧制度。本研究区域的气候被划分为冷温带至地中海气候区，冬季寒冷湿润（5月至8月），夏季温暖干燥（12月至次年2月），气温区间为1~30℃；2001年至2012年的年平均气温为12.1℃。年降水量约为871毫米（对应142年的长期平均水平）。2010年至2016年期间，研究团队借助搭载于拖车的移动实验室——傅里叶变换红外（FTIR）光谱仪，采集了土壤温室气体通量（CO₂、CH₄及N₂O）的连续自动观测数据。观测初始高度为30米，自2017年1月起，观测高度提升至33米。