Howard Springs Flux Data Release 2024_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 (v3.4.17) 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 site is classified as an open woodland savanna. The overstory is co-dominated by tree species Eucalyptus miniata and Eucalyptus tentrodonata, and average tree height is 14-16 m. Elevation of the site is close to 64 m and mean annual precipitation is 1750 mm. Maximum temperatures range from 30.4 °C (in July) to 33.2 °C (in November), while minimum temperatures range from 19.3 °C (in July) to 25.4 °C (in November). Therefore, the maximum and minimum range varies from 7 °C (wet season) to 11 °C (dry season). The instrument mast is 23 m tall. Heat, water vapour and carbon dioxide measurements are taken using the open-path eddy flux technique. Temperature, humidity, wind speed, wind direction, rainfall, incoming and reflected shortwave radiation and net radiation are measured above the canopy. Soil heat fluxes are measured and soil moisture content is gathered using time domain reflectometry.本数据集包含采用涡度协方差（eddy covariance）技术获取的地表与大气边界层间能量和物质交换的通量塔观测数据。数据采用PyFluxPro（v3.4.17）进行处理，处理流程参照Isaac等人（2017）的研究方法。PyFluxPro可生成经过间隙填充的最终数据集，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）。 该观测站点被归类为开放林型稀树草原。林冠层由细叶桉（Eucalyptus miniata）与Eucalyptus tentrodonata作为共建优势种，平均树高为14-16米。站点海拔接近64米，年平均降水量为1750毫米。最高气温介于30.4℃（7月）至33.2℃（11月）之间，最低气温则介于19.3℃（7月）至25.4℃（11月）之间。由此可知，该区域气温日较差在湿季为7℃，干季可达11℃。 观测用仪器桅杆高度为23米。采用开路式涡度通量技术获取热量、水汽与二氧化碳的观测数据。冠层上方布设了温度、湿度、风速、风向、降雨量、入射与反射短波辐射以及净辐射的观测传感器。土壤热通量由传感器测定，土壤含水率则采用时域反射仪（time domain reflectometry, TDR）进行采集。